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South West Observatory






SW Observatory Environment module

Last update:

20th May 2008

Quick links

State of the South West 2008

State of the Env ironment in the South West

Regional strategy for the South West's environment

What is climate change?

Are humans responsible?

What is the UK doing?

SW community climate action

Climatic trends in the SW - temperature

Climatic trends in the SW - sea level

Climatic predictions for the SW

Detailed impacts of climate change in the South West

Impacts on the natural environment

Nature's Calendar

Impact on trees and woodland

Impact on water resources

Impacts on society

Impacts on the economy

Impacts on the marine environment

Impacts on seasons

Impacts on migratory species

A more local perspective - Plymouth

A more local perspective - Bristol

A more local perspective - Cheltenham

Changing climate - changing behaviour

Action to tackle climate change

Recent climate change publications

Carbon dioxide

Air Quality

Energy

Transport

Renewable energy

Useful links:

SW Climate Change Impacts Programme

Stop Climate Chaos

Animated guide to cilmate change - BBC

Defra action to takle climate change

Marine Climate Change Impacts

Inter-Governmental Panel on Climate Change

UK Climate Impacts Programme

Environment Agency - climate change pages

NASA's Earth Observatory

Climate change

Climate change is the greatest environmental challenge facing the world today.

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Visible pollution over Europe (source: Visible Earth)Records indicate that the world has warmed by about 0.6°C since the beginning of the twentieth century, with about 0.4°C of this warming occurring since the 1970s.

In the South West, 8 of the 10 warmest years have occurred since 1990, with the 1990s being the warmest decade on record.

What is climate change

The Earth would be about 33°C colder if it were not surrounded by gases such as water vapour, carbon dioxide and methane, which trap heat from the sun. However, if the amount of heat-trapping gases increases, less heat can escape back into space, the natural greenhouse effect is enhanced and the Earth gets warmer.

An animated guide to climate change is available from the BBC.

For about a thousand years before the Industrial Revolution, the amount of greenhouse gases in the atmosphere remained relatively constant. Since then, the concentration of various greenhouse gases, including carbon dioxide, methane, nitrous oxide and fluorinated gases, has increased. The amount of carbon dioxide, for example, has increased by more than 30% since pre-industrial times and is still increasing at an unprecedented average rate of 0.4% per year. This is mainly due to the combustion of fossil fuels and deforestation.

The Intergovernmental Panel on Climate Change (IPCC) reported in 2001 that this increase comes from human activities, because the changing isotopic composition of the atmospheric carbon dioxide is different from that of fossil origin.The climatic response to these increased greenhouse gas concentrations is complex, but can, to an extent, be predicted using atmosphere and ocean mathematical models. Predictions may also be carried out for possible future scenarios of economic development and anthropogenic (man-made) greenhouse gas emissions.

See sections on releases to air and air, energy and transport for more information on the impact of man's activities.

Humans are responsible for climate change

Global climate change is "very likely" to have a human cause, an influential group of scientists has concluded.

On 2 February 2007 the Intergovernmental Panel on Climate Change (IPCC) adopted the first volume, 'Climate Change 2007: the Physical Science Basis', one of three volumes that forms the IPCC’s Fourth Assessment Report.

Climate Change 2007: The Physical Science Basis assesses the current scientific knowledge of the natural and human drivers of climate change, observed changes in climate, the ability of science to attribute changes to different causes, and projections for future climate change. The report was produced by some 600 authors from 40 countries.

In 2001, the IPPC said that it was "likely" that human activities lay behind the trends observed at various parts of the planet - meaning between a 66% and 90% probability. Now, scientists are at least 90% certain that human emissions of greenhouse gases rather than natural variations are warming the planet's surface.

Global atmospheric concentrations of carbon dioxide (CO2), methane and nitrous oxide have increased markedly as a result of human activities since 1750 and now far exceed pre-industrial values determined from ice cores spanning many thousands of years. The global CO2 increase is primarily due to fossil fuel use and land-use change, while increases in methane and nitrous oxide are primarily due to agriculture.

Key highlights
  • Warming of the climate system is unequivocal. The Earth has warmed by 0.74°C over the last century and about 0.4°C of this warming has occurred since the 1970s. The rate of warming over the last 50 years, is nearly twice that for the last 100 years. Eleven of the last twelve years rank among the 12 warmest years in the instrumental record of global surface temperature. This warming is now evident throughout the climate in many other components of the climate system.
  • The role of human activities in the observed changes is now clearer than ever. The AR4 report concludes that most of the observed increase in globally averaged temperatures since the mid-20th century is very likely due to the increase in anthropogenic greenhouse gas concentrations.
  • Future warming is strongly dependent on our emissions. For a low emissions scenario, temperatures are projected to rise by 1.7°C, with a likely range of 1.1 to 2.9°C by 2090 - 2099, with respect to 1980 - 1999. For a high emissions scenario, this increases to 4.0°C, with a likely range of 2.4 to 6.4°C.
  • Globally-averaged sea level is projected to continue to rise, reaching 0.18 - 0.38 m above the 1980 – 1999 level for a low emissions scenario, and 0.26 - 0.59 m for a high emissions scenario, by the end of the 21st century.
  • The world’s oceans are expected to become more acidic as carbon dioxide concentrations continue to increase. This will have detrimental effects on ocean ecosystems.
  • Rising global mean temperatures are expected to be accompanied by many other changes in the climate system, including weakening of some large-scale ocean currents and shifts in rainfall patterns. In the high-latitudes, precipitation amounts are expected to increase, while decreases are expected in most subtropical land areas. In addition, snow cover and sea ice extent will continue to contract, rainfall and tropical cyclones (hurricanes and typhoons) will intensify and hot extremes will become even more frequent.

What are we doing about climate change?

The UK is acting now to adapt to climate change and to reduce the risk by reducing our contribution to the causes.

Under the Kyoto Protocol, the UK must reduce its greenhouse gas emissions by 12.5% below base year levels over the 2008 to 2012 commitment period.

In 1997, the UK committed itself beyond to go beyond our Kyoto Protocol target by setting a national goal to reduce carbon dioxide emissions by 20% below 1990 levels by 2010. In 2003, the Energy White Paper adopted a longer term goal to put the UK on a path to reduce carbon dioxide emissions by some 60% by 2050, with real progress by 2020.

While the UK is on track to meet its Kyoto Protocol target the UK government appreciates that we need to do more to meet our challenging domestic targets. The 2006 UK Climate Change Programme aims to put the UK back on track. Published in March 2006, this report details the policies and measures which the UK is using to cut its emissions of greenhouse gases. It also explains how the UK plans to adapt to the impacts of climate change.

Although the UK is on line for meeting greenhouse gas targets set by the Kyoto agreement by 2008–2012 (12.5% below 1990 levels), it is currently unlikely that it will meet its own domestically set target of 20% below 1990 levels by 2010. Despite making carbon dioxide cuts we still need to adapt to the changes in the climate system that are unavoidable, due to past emissions.

New Climate Bill& Strategy unveiled

Government's blueprint for tackling climate change was set out on the 15th March 2007 by Environment Secretary David Miliband.

The draft Climate Change Bill, the first of its kind in any country, and accompanying strategy, set out a framework for moving the UK to a low-carbon economy, demonstrating the UK's leadership as progress continues towards establishing a post-2012 global emissions agreement.

Key points of the draft bill, published today, include:

  • A series of clear targets for reducing carbon dioxide emissions - including making the UK's targets for a 60% reduction by 2050 and a 26 to 32% reduction by 2020 legally binding.
  • A new system of legally binding five year “carbon budgets”, set at least 15 years ahead, to provide clarity on the UK's pathway towards its key targets and increase the certainty that businesses and individuals need to invest in low-carbon technologies.
  • A new statutory body, the Committee on Climate Change , to provide independent expert advice and guidance to Government on achieving its targets and staying within its carbon budgets.
  • New powers to enable the Government to more easily implement policies to cut emissions.
  • A new system of annual open and transparent reporting to Parliament. The Committee on Climate Change will provide an independent progress report to which the Government must respond. This will ensure the Government is held to account every year on its progress towards each five year carbon budget and the 2020 and 2050 targets.
  • A requirement for Government to report at least every five years on current and predicted impacts of climate change and on its proposals and policy for adapting to climate change.

The draft bill will be subject to a full public consultation alongside pre-legislative scrutiny in Parliament.

The strategy paper sets out how the Climate Change Bill fits into the Government's wider international strategy and a range of future domestic policies to achieve its aims. It argues that all sectors of society will have to contribute to the transition to a low-carbon economy, but that this does not mean a reduction in standards of living.

It sets out a vision for how the UK can move to a low carbon economy including:

  • Investment in low-carbon fuels and technologies, such as carbon capture and storage, wind, wave and solar power.
  • Significantly more efficient use of energy.
  • A step change in the way energy suppliers operate so that they focus on reducing demand rather than just supplying as much energy as possible.
  • Consumers becoming producers as well as consumers of energy.

South West Climate Change Declaration

Download the South West Climate Change Declaration here.

Climate change in the UK and South West

The following information aims to draw together the evidence of climate change in the South West, where possible, with UK comparisons. The South West Climate Change Impacts Partnership is the definitive resource for news, evidence and information about climate change in the region.

South West climate change profile data

There is a growing amount of information now freely available that can help to pull together a picture of how climate change is affecting an area and to help support local climate change action plans.

An example has been pulled together for Cornwall, which could be used as a template for other areas.

The Cornwall example currently contains the following data:

  • Maximum temperature at St Mawgan (1957 - 2007)
  • Minimum temperature at St Mawgan (1957 - 2007)
  • Number of days of air frost at St Mawgan 1957 - 2007
  • Rainfall (mm) at St Mawgan 1957 - 2007
  • Cornwall rainfall data
  • Total rainfall (mm) at St Mawgan 1957 - 2007
  • Total sunshine duration (hours) at St Mawgan 1955 - 2007
  • Sea level rise at Newlyn 1916 - 2006
  • Monthly mean sea temperature at Newlyn 1984 - 1994
  • Newlyn highest and lowest tide surges
  • St Marys highest and lowest tide surges
  • % basking shark sightings in the South West and Scotland 1988 - 2005
  • Fish & shellfish landings into major ports in the South West 2006
  • Planning applications objected to by the Environment Agency on flood risk grounds 2006/2007
  • No. of decisions where application was approved by Local Planning Authorities contrary to Environment Agency advice 2006/2007
  • Cornwall local authority total eco footprint
  • Cornwall local authority eco footprint - CO2 per capita
  • Electricity consumption (2006)
  • Gas consumption (2006)
  • South West installed renewable electricity capacity (MW) April 2007
  • Installed renewable electricity capacity by local authority area April 2007
  • South West renewable heat capacity (MW) April 2007
  • Installed renewable heat capacity by local authority area April 2007
  • Bracken, ticks and heather indicators of climate change in the South West uplands (Bodmin, Dartmoor & Exmoor)
  • Mortality from malignant melanoma in Cornwall's local authority areas 1993 - 2006

All data is sourced, so easily to find for another county or area. Any comments on this collection of data is welcome, email Annette Carr

Temperature

Records indicate that the world is warming. The UK Climate Impacts Programme in 2002 identified that global temperature has risen by about 0.6°C since the beginning of the twentieth century, with about 0.4°C of this warming occurring since the 1970s. The latest research has indicated that because of a rapid warming trend over the past 30 years, the earth is now at its warmest in 12,000 years (Hansen et al., 2006).

Preliminary temperature figures for 2006, released today by the Met Office and the University of East Anglia (UEA's Climatic Research Unit), show the mean surface air temperature has continued to demonstrate a warming climate, both around the globe and especially here in the UK.

Worldwide, the provisional figures for 2006 using data from January to November, place the year as the sixth warmest year. This is on a record that stretches back to 1850 (the top 10 warmest years have all occurred in the last 12 years) and it could have been warmer but for a cool start due to La Nina.

In the UK, the year has been remarkable, with the Central England Temperature series setting a succession of records. Not only have individual months set new records, but more significantly, extended periods have also done so:

  • Warmest month on record set this July, with a mean temperature of 19.7°C
  • Warmest ever September (16.8°C)
  • Warmest ever April to October having a mean temperature of 14.6°C
  • Warmest ever autumn with a mean temperature of 12.6°C

2006 is very likely to be the warmest year in terms of Central England Temperatures. The joint warmest years currently are 1990 and 1999, which recorded a mean temperature of 10.63°C and with just over two weeks to the end of the year, the current mean temperature anomaly to 12 December is equivalent to an annual temperature of 10.84°C.

Top 10 warmest years: Mean Central England Temperatures and difference from 1961-90 average Top ten warmest years
Year
Mean (°C)
Difference from 1961-90 (°C)

2006 (to 12th December)

10.84

+1.37

1999

10.63

+1.16

1990

10.63

+1.16

1949

10.62

+1.15

2002

10.60

+1.13

1997

10.53

+1.06

1995

10.52

+1.05

2003

10.50

+1.03

1989

10.50

+1.03

2004

10.48

+1.01

Source: Met Office (2006)

In the South West, Met Office records for Exmouth exist from 1930, which show that the last decade (1995- 2004) is the warmest on record, followed by the 1980s and the 1970s.

Trend in mean annual temperature for Exmouth (1860 - 2003) as a departure from the 1961 - 1990 average (10.5C)

Graph showing trends in mean annual temperature 1860 - 2003 in Exmouth click to enlarge

Source: Met Office, 2003

Sea level

Rising or falling sea level can reshape the world’s coastlines and affect some of the most densely populated areas on Earth. Not surprisingly, scientists want to understand sea level as thoroughly as possible. They have discovered that the ocean’s behavior is not uniform all over the world, neither are the factors that affect sea level. When sea level rises, it can do so for a few reasons. It can rise due to thermal expansion—the tendency of warm water to take up more space than cooler water. It can rise due to the addition of water, for instance from melting glaciers. It can also rise due to changes in salinity; fresh water is less dense than salt water and therefore takes up slightly more space than an equal mass of salt water (NASA, 2006)

Information on global sea level rise was published by NASA in June 2006. According to this new research, sea level rose, on average, 3 millimeters (0.1 inches) per year between 1993 and 2005. Researchers attributed about half of that increase to melting ice and the other half to thermal expansion as the ocean absorbs excess energy.

Mean global sea level rise 1993 - 2005

Mean global sea level rise 1993 - 2005 click to enlarge

Source: NASA (2006)

Global mean sea level is projected to rise by 0.09 to 0.88 metres between 1990 and 2100, primarily as a result of thermal expansion of the oceans, with a secondary but significant input from glacial melt water (SWCCIP, 2003).

Sea-level rise in the South West could be the highest in Great Britain, with a rise between 20-80cm by the 2080s, depending on emissions scenarios (UKCIP, 2005). Newlyn (Cornwall) has one of the longest sea level records in the UK and, although fluctuations occur year on year, sea level here was 161mm higher in 2006 than when records began in 1916.

Mean wave height from trough to crest has also increased, from 1.8m in 1962 to 2.3m today (Seven Stones Light-vessel). Such changes may adversely affect sea defences, harbours, homes, businesses, infrastructure, maritime heritage as well as natural assets and biodiversity (Proudman Oceanographic Laboratory, 2006).

Sea level change at England monitoring sites 1834 - 2004

Sea level rise at monitoring stations in the England 1834 0 2004 click to enlarge

Source: Proudman Oceanographic Laboratory, 2006

Sea level change in Newlyn (Cornwall), 1915 - 2006

Sea level rise in Newlyn 1916 - 2006click to enlarge

Source: Proudman Oceanographic Laboratory, 2007

Sea level rise and climate change will increase the scale and pace of coastal erosion. Research has shown that 779km of National Trust owned land in the region is at risk from coastal erosion over the next 100 years and 852 hectares at risk of increased flooding. Trust owned land in the South West is the most at risk of coastal erosion in England and Wales and is second only to the East in terms of increased flooding (National Trust, 2005).

National Trust-owned coast at risk from erosion and flooding over the next 100 years
Region
Kilometres of National Trust coast affected by erosion
Hectares of National Trust land at risk of flooding

South West

279

852

South East

44

467

East

45

1,837

London

-

1

North West

9

70

Yorkshire

12

1

North East

52

26

Wales

167

786

Total

608

4,040

Source: National Trust, 2005

See also impacts of climate change on the marine environment

Detailed impacts of climate change in the South West

In terms of rainfall and sunshine, Met Office records show that 2003 was the 4th driest and the 4th sunniest in series for the South West. There is also evidence that UK rainfall patterns are changing.

Although there are no long-term trends in total annual precipitation, there is a trend in seasonality. According to the UK Climate Impacts Programme (UKCIP) in 2002, over the last 30 years winters have been getting warmer and summers drier. During this period the contribution of the most intense rainstorms to total winter precipitation has also increased.

The UKCIP in 2002 identified that sea-surface temperatures of UK waters have shown an increase in annual average of approximately 0.6°C over the last 70 to 100 years. This is consistent with the warming observed over land. During the twentieth century global sea level rose by about 1.5 mm per year, due to a number of factors including thermal expansion and melting of land glaciers. The present estimated rate of vertical land movement (the natural ‘see-saw’ effect caused by the compression of land under the weight of ice 20-30,000 years ago) for the South West is 0.6mm per year, giving a regional relative sea level rise of 2.1 mm per year.

Warming to the Idea report coverThe South West Region Climate Change Impacts Scoping Study - Warming to the Idea (2003), details the impacts of climate change on the region as described below. Reaction to climate change and its impacts will be through two methods: adaptation and mitigation. People will need to learn how to live with unavoidable changes in the weather (adaptation) as well as ensure future developments reduce or eliminate anthropogenic climate change (mitigation).

 

Future seasonal climate in the South West

Seasonal climate (the range of figures indicates Low and High emissions scenario results)
Season
2050s
2080s
Spring
  • Warmer by 1.0 to 2.0°C
  • Precipitation totals similar to now
  • Warmer by 1.5 to 3.5°C
  • Precipitation totals similar to now
Summer
  • Warmer by 1.5 to 3.5°C
  • Drier by 15 to 30%
  • Warmer by 2.0 to 5.5°C
  • Drier by 25 to 55%
Autumn
  • Warmer by 1.5 to 3.0°C
  • Drier by 0 to 10%
  • Warmer by 2.0 to 5.0°C
  • Drier by 5 to 15%
Winter
  • Milder by 1.0 to 2.0°C
  • Wetter by 5 to 15%
  • Milder by 1.5 to 3.5°C
  • Wetter by 10 to 30%
  • Snowfall will decrease by 70% to 90%

Source: UK Climate Impacts Programme, 2002

Summary of climate changes for the South West by the 2050s

Likely change (the range of figures indicates Low and High emissions scenario results)
Temperature
  • Annual warming of 1.0 to 2.5°C (annual warming of 1.5 to 4.5°C in the 2080s)
  • Greater warming in summer and autumn than in winter and spring
  • Greater night-time than day-time warming in winter
  • Greater day-time than night-time warming in summer
  • Years as warm as 1999 (+1.2°C hotter than average) more common
Precipitation
  • Winters 5 to 15% wetter (winters 10 to 30% wetter by the 2080s)
  • Summers 15 to 30% drier (summers 25 to 50% drier by the 2080s)
  • Heavy rainfall in winter becomes more common
  • Greater contrast between summer (drier) and winter (wetter) seasons
  • Summers as dry as 1995 (37% drier than average) become more common
  • Winter and spring precipitation becomes more variable
  • Snowfall totals decrease significantly
Cloud cover
  • Reduction in summer and autumn cloud and increase in radiation
  • Small increase in winter cloud cover
Humidity
  • Specific humidity increases throughout the year
  • Relative humidity decreases in summer
Soil moisture
  • Decreases in summer
  • Slight increase in winter soil moisture
Storm tracks
  • Winter depressions become more frequent including deepest ones
North Atlantic Oscillation
  • North Atlantic Oscillation may become more positive in the future, bringing more wet, windy and mild winters

Source: UK Climate Impacts Programme, 2002

Impact on the Natural Environment

The impact of climate change will have a significant impact on the natural environment. Habitats will change and many species will not be able to adapt quickly enough. Native species of flora and fauna could be under real threat. Water resources will also be under increased pressure as demands increase and summers become drier.

Nature's calendar - Mapping how biodiversity is responding to a changing climate

Climate change will affect not just our woods and forests but all natural environments, and is the biggest threat that the whole human race has yet to face.

The Nature's Calendar website is a fantastic resource that not only helps you to understand how climate change is directly affecting our biodiversity, it also allows you to become directly involved in improving our knowledge of what is happening locally. Run by the Woodland Trust and the Centre for Ecology and Hydrology, this website collects in phenological records (such as timings of flowers, leaves, bird arrivals) that entered by the general public, schools and other organisations based on sightings in gardens or local area.

Phenology is the study of the times of recurring natural phenomena especially in relation to climate. It is recording when you heard the first cuckoo or saw the blackthorn blossom, which can then be compared with other records such as temperature to help track how our biodiversity is changing over time. Phenology already provides some of the longest written biological records in Britain.

Live maps, trends and data is all available online to help track nature's calendar, such as the first signs of spring or species distribution.

Over 15,000 people across the UK are now actively involved with the UK Phenology Network, collecting valuable information on seasonal occurrences in order to help to demonstrate how climate change is affecting our wildlife and habitats.

Get involved and register to enter your own records or simply visit the website to find out how biodiversity in your area may be changing.

Smooth snake
Smooth Snake (Centre for Ecology & Hydrology)

Golden Plover
Golden Plover (RSPB)

Habitats and landscapes

The threat to biodiversity from climate change is high. The region is home to national rarities such as Cornish heather, the smooth snake (Britain’s rarest reptile) and other species which are confined to areas such as Dorset heath.

Many such species could be lost as they may not be able to migrate or adapt quickly enough to survive. Nearly 20% of England’s ancient woodland is in the South West; this is particularly vulnerable, as many of its characteristic species have poor dispersal and will be unable to migrate.

Warmer winters could adversely affect species suited to harsher winter weather, such as the large heath butterfly, which might disappear from the region altogether. Others may be eclipsed locally by new species colonizing the area.

Those species at the southern breeding limit of their range are probably most at risk of loss from the region. For example, the golden plover is no longer breeding in the South West due to milder winter temperatures. Many habitats in the South West are fragmented and in effect islands surrounded by farmland, through which many native plant and animal species will be unable to migrate as conditions change.

Heritage landscapes, including much of the coast and the region’s archaeological remains, are also vulnerable to increased storm events, changes in soil moisture and flooding.

Trees and woodland

A report on the impact of climate change on South West trees and woodland (2004) has been published by Forest Research (an Agency of the Forestry Commission).

Key issues raised in this report include:

Rising atmospheric carbon dioxide (which fertlises photosynthesis):
  • Productivity may increase by of 2-4 yield classes (m3 ha-1 yr-1)
  • An increase in leaf area and a possible reduction in timber density and quality.
  • A reduced risk of insect and herbivore damage may also be experienced as a result of the decline in nutritional quality of foliage
Species suitability for commercial forestry:
  • Sitka spruce will become less suitable at lower altitude, and particularly in the East. However, high productivity is maintained across much of the Peninsula (Devon and Cornwall)
  • Productivity of Scots pine will fall significantly across the whole of the region, but particularly in the East.
  • Corsican pine will become more productive in the East.
  • Douglas fir will become more suitable in the timber production areas of Devon, but will become less suitable to both the East and West.
  • Ash will replace beech Wiltshire, Somerset and Devon (under the 2050s Low scenario) and will be replaced by pedunculate oak under the 2050s High scenario.
  • Sycamore will suffer in the east of the region, but will maintain productivity in the West
Woodland fires
  • The predictions of an increase in the frequency and severity of summer droughts would be expected to result in a large increase in the number of fires and affected areas
Biodiversity
  • There are unlikely to be major changes in woodland type as a result of climate change. However, a range of responses will be evident across the range of native species associated with woodland, with some winners and some losers.
  • It is likely that management intervention will be required to aid the migration of plant, mammal and invertebrate species.
Insect pests
  • Of the current insect pests, the effects of climate change on populations of the green spruce aphid are probably of most concern because of the link between winter temperatures and the prevalence of the insect. Significant losses to Sitka spruce are likely as a result
  • Bark beetles are also likely to benefit from climatic warming, especially if this leads to stressed trees that are more vulnerable to attack.
Diseases
  • There is some evidence that the activity of Fomes root and butt rot, an economically important disease of conifers, may be enhanced at higher
    temperatures. However, the risk of infection is considered to be low in wet soils in high rainfall areas; thus a change to drier conditions, at least in summer, might warrant reassessment of some currently low risk areas. However, the predominantly acidic soils in the south west lower the risk of Fomes infection.
  • However, red-band needle blight which affects Corsican pine has now been identified in the South West, and its rapid spread has been linked to climatic warming. This disease may limit the suitability of Corsican pine in the future.
  • The current serious problem in the South West of Phytophthora infections of alder in riparian woodland would be expected to become more serious if winter rainfall increases as flooding episodes, which allow the build-up of debris around the root collar, appear to promote infection
Woodland mammals
  • Most mammalian pests of woodland will benefit from the milder winters that are predicted. In addition, earlier growth of ground vegetation will provide forage for herbivores, which is currently one limitation to population expansion. Populations of fallow, muntjac roe and red deer have all been expanding their range in recent
    years, and they are now becoming a serious pest in some areas.
  • Populations of grey squirrels will benefit from climatic warming as it is susceptible to winter cold. Control of their numbers is likely to be an ongoing problem for woodland management, particularly in view of the damage caused to beech and sycamore.

More information and details about the impacts of climate change on the South West's trees and woodland are available in the report.

Coastal areas and sea fisheries

As relative sea levels continue to rise, increased wave heights and potential storminess will become more frequent, bringing further risks of coastal flooding and erosion. This may adversely affect sea defences, harbours, homes, businesses, infrastructure, maritime heritage as well as natural assets and biodiversity. The costs of maintaining and building new coastal defences are likely to be significant. Protecting many coastal assets from erosion may therefore be too costly: in some cases relocation or managed retreat will be the best option. Natural assets such as valued landscapes, archaeological remains, beaches, wetlands, mudflats, salt marshes and dunes may also be lost, together with their flora and fauna.

The coastal waters of the South West mark a boundary between the warm southern and cool northern seas. Such conditions create an abundance of species. Fish are particularly sensitive to small changes in temperature, causing changes in distribution at the extremities of their ranges. The ocean’s overall productivity may also be reduced by globally rising temperatures, affecting species across the entire marine food chain. These changes could result in increased pressure on fish stocks with serious consequences for fisheries in the region. The warming of the ocean could result in significant losses of indigenous species to the north and cause the colder water cod populations to fall. There is already evidence that new warmer water southern species are being caught in Cornish waters.

Climate change and the marine environment

The biodiversity and productivity of seas around the UK could already be suffering the consequences of climate change, according to the Marine Climate Change Impacts Partnership's 2nd Annual Report Card 2007 - 2008

The Marine Climate Change Impacts Partnership (including government departments, academics and NGOs) hope that the report will give more people better access to the research, and help them understand the issues surrounding the topic.

The 2007 - 2008 Annual Report Card builds upon the evidence base presented in 2006, highlighting key developments and exploring new subject areas (coastal erosion, coastal habitats and air–sea exchanges of heat and water). It brings together scientific understanding from a wider range of research institutes, providing an even more comprehensive assessment of UK marine climate change impacts and highlighting regional variations where possible.

As the evidence base continues to build, it is clear that marine climate change is having important impacts on the marine environment and the goods and services it provides. The information presented this year demonstrates the important knock-on effects that climate change can have through the food chain. For example, at the bottom, warming has led to plankton shifts, which have had an impact upon predators such as fish, which then affects seabirds.

Key findings include:

  • 2006 was the second-warmest year in UK coastal waters since records began in 1870; seven of the 10 warmest years have occurred in the last decade.
  • Models predict fewer storms but there will be a greater number of more severe storms.
  • Coastal erosion is expected to increase. Currently, it affects 17% of the UK coastline.
  • Warmer winters have been strongly linked to reduced breeding success and survival in some seabird populations.

Below is a summary of how climate change is already impacting on the marine environment (with varying levels of confidence). More information about future impacts is also available in the Annual Report Card 2007 - 2008.

Climate change in the marine environment

Ocean climate is largely defined by its temperature, salinity, ocean circulation and the exchange of heat, water and gases (including CO2) with the atmosphere. The functioning of our marine ecosystem is highly dependent on changes to both ocean climate and acidification, whilst storms and waves, sea-level rise and coastal erosion pose clear threats to human life, built structures and shipping.

Element of the marine environment

What's already happening

Temperature (air & sea)

  • Marine air and sea surface temperatures (SST) have been rising at a similar rate to land air temperature, but with strong regional variations. Since the 1980s the rate of rise has been about 0.2–0.6 ºC per decade.
  • Warming has been faster in the English Channel and southern North Sea than within Scottish continental shelf waters.
  • 2006 was the second-warmest year in UK coastal waters since records began in 1870; seven of the 10 warmest years have occurred in the last decade.
  • Recent warming is also evident in waters of the upper 1,000 m of the North Atlantic.

Coastal erosion

  • Coastal erosion is occurring along 17% of the UK coastline (30% of England’s coastline; 23% Wales; 20% Northern Ireland; 12% Scotland).
  • Almost two-thirds of the intertidal profiles in England and Wales have steepened over the past 100 years.
  • Steepening of the intertidal profile is particularly prevalent on coasts protected by hard engineering structures (this represents 46% of England’s coastline; 28% Wales; 20% Northern Ireland and 7% Scotland).

Ocean salinity

  • Surface waters to the north and west of the UK have become relatively more saline since the 1970s. There are no clear trends in the shallow coastal waters of the Irish Sea, southern North Sea and western Scotland.
  • Deep waters of the North Atlantic have freshened over the past 40 years.

Storms & waves

  • A greater incidence of severe winds and larger mean wave heights in western and northern UK waters are being observed.

Large scale oceanic processes

  • The Atlantic Meridional Overturning Circulation (MOC) helps to maintain relatively mild temperatures in north-west Europe. Some observations suggest that the MOC has reduced in strength by up to 30% since the early 1990s. However, other studies disagree with this interpretation.

Sea level

  • Global average sea level has risen during the 20th century by between 1 and 2 mm per year. The latest published satellite measurements suggest the rise was around 3 mm per year between 1993 and 2003.
  • Smaller rates of rise are seen in Scotland compared to the south of England.
  • Extreme water levels have also increased in the UK, most likely as a consequence of mean sea-level rise.

Acidification

  • The ocean is becoming more acidic as increasing atmospheric carbon dioxide (CO2) is absorbed at the sea surface. Models and measurements suggest that surface pH has decreased by 0.1 pH unit since 1750.
  • The surface ocean has absorbed nearly half of the increased CO2 emissions due to burning of fossil fuels over the last 250 years, thus reducing the amount remaining in the atmosphere.

Shelf-sea stratification

  • There is evidence to suggest a recent trend towards stratification (layers of less dense water above more dense water) earlier in the year, resulting in earlier spring blooms of plankton – largely in response to warming air temperatures.

Gulf Stream and Atlantic Heat Conveyor

  • The Atlantic Heat Conveyor (within which the Gulf Stream plays a role) helps to maintain relatively mild temperatures in north-west Europe. Some observations suggest that the Atlantic Heat Conveyor has reduced in strength by up to 30% since the early 1990s. More data are needed to distinguish this trend from natural variability, which has recently been shown to be large on a day-to-day basis.

Air-sea flux of heat and water

  • The exchange of heat and water between the ocean and the atmosphere plays an important role in driving the circulations of both the atmosphere and ocean.
  • There is little evidence for major changes in air–sea fluxes of heat and water around the UK.
Climate change impacts on marine biodiversity

As the marine ecosystem is highly interconnected through predator–prey relations, the direct impacts of ocean climate change have ‘knock-on’ effects through the food chain. For example, recent warmer conditions and associated shifts in plankton abundance and geographical distribution have led to reduced availability of prey fish for some seabirds, which has been strongly linked to recent poor breeding success and reduced survival rates.

Species

What's already happening

Plankton

  • A 1,000-km northward shift of warmer-water plankton, with a similar retreat of colder-water plankton, has been observed in the north-east Atlantic over the past 50 years, as the seas around the UK have become warmer.
  • In the North Sea, the population of the previously dominant and important cold-water zooplankton species Calanus finmarchicus has declined in biomass by 70%
    since the 1960s.
  • The seasonal timing of plankton production has altered in response to recent climate changes. Some species are occurring up to four to six weeks earlier than 20 years ago, affecting predators, including fish.

Fish

  • Abundances of warm-water fish species (e.g. red mullet, John Dory, triggerfish) have increased in UK waters during recent decades, while many cold-water species have experienced declines.
  • There has been a notable influx of snake pipefish to UK waters since 2004, and research is under way to explain this.
  • Poor ‘recruitment’ of juvenile cod may be associated with a climate-related shift in the composition of zooplankton, but also by a reduction of the adult, parental population by fishing.
  • In some parts of the southern North Sea, cold-water species, such as cod and eelpout, have been shown to experience metabolic stress during warm years, as
    evidenced by slower growth rates and difficulties in supplying oxygen to body tissues.

Marine mammals

  • The impact of climate change on marine mammals (i.e. seals and cetaceans) remains poorly understood.
  • Range shifts have been observed in a number of cetacean species, but at present it is not possible to differentiate between short-term responses to regional resource variability and longer-term ones driven by climate change

Sea birds

  • Poor breeding success and reduced survival of black-legged kittiwakes in recent years have been strongly linked to warmer winters and changes to their fish prey populations (e.g. smaller, less-nutritious sand eels, increased snake pipefish abundance). Other seabird species may have been similarly affected.

Non-native species

  • Distributions of non-native species are currently limited by water temperature.
  • Non-native marine organisms (e.g. japweed and Chinese mitten crab) are spreading and becoming established in our waters through a combination of climate change, migration and human introduction. These can cause major ecological changes.

Intertidal species

  • Some warm-water invertebrates and algae show continued increases in abundance and have extended their ranges around northern Scotland and eastwards along the English Channel over the last 20 years.
  • The warm-water seaweed Bifurcaria bifurcata has established a new range boundary at Portland Headland in the last five years, 150 km east of previous records.
  • Cold-water species (e.g. the acorn barnacle and dabberlocks alga) have continued to decrease in abundance throughout the period 2001–2007.

Seabed ecology

  • Climatic processes influence the abundance and species composition of seabed communities, directly affecting the availability of food for bottom-feeding fish.
  • Localised effects of fishing, causing habitat modification, and of contaminants are also important and make it difficult to fully assess the scale of the influence of climate change.

Coastal habitats

  • Coastal habitats are being lost around the UK. In England, it is estimated that at least 40–100 hectares of saltmarsh is being lost every year; projects are under way to estimate rates of loss in other regions.
Impact of climate change on marine cleanliness & safety

Sea-level rise will lead to more coastal flooding with impacts on coastal erosion, coastal habitats, built structures and possible threats to human life. Links between land and sea are also strongly expressed in contaminant transport (nutrients and other pollutants), as their seaward transport will be highly dependent on future climate change on land (e.g. drier summers with episodic downpours; a greater number of more severe storms).

Issue

What's already happening

Coastal flooding

  • Increased flood risk, from both rivers and the sea, is one of the most significant predicted impacts of climate change in the UK.
  • An increasing trend in extreme water levels has been observed and is most likely to be a consequence of the rise in average sea level.

Nutrient enrichment

  • Drier summers may be contributing to a decrease in nutrient inputs in European seas.
  • It is difficult to discriminate between the effects of human inputs (e.g. agricultural run-off) and those that may be due to climate change through rainfall and ocean transport.

Harmful algal blooms (HABs)

  • Harmful Algal Blooms (HABs) – harmful due to the release of toxins and sometimes by oxygen depletion – are now thought to be driven largely by ocean climate forcing, with nutrient enrichment only relevant to some cases.
  • HABs have increased in some areas of the north-east Atlantic over the past 50 years, as the seas around Great Britain and Ireland have become warmer, especially since the mid-1980s.
  • There is regional variability within this trend and some places, such as the east coast of Britain, have experienced reduced incidences of HABs.

Pollution

  • Unknown. Pollutant monitoring is currently inadequate for identifying climate change related impacts.
Impact of climate change on marine commercial productivity

The impacts of climate change on the commercial services provided by our seas will be significant. Sea-level rise, coastal flooding and storms and waves will affect ports, shipping and built structures. Fishing and fish farming will be affected by temperature change and plankton availability. Rising temperatures should have positive impacts on tourism, whilst retreating Arctic sea-ice may open up new (seasonal) shipping routes.

Issue

What's already happening

Shipping

  • There are no academic studies available on the direct impacts of climate change on shipping, although numerous industry and media reports have been published in the past year.
  • Climate change mitigation measures are having an indirect impact; in the short term, regulation of greenhouse emissions will arise through international agreement and a Greenhouse Gas Indexing Scheme for ships is being developed.
  • Fuel efficiency and reduction of greenhouse gas emissions are driving a push for new propulsion and hull technology.

Tourism

  • Climate change is increasing the frequency of months when conditions are more comfortable for tourists in north-west Europe than in the Mediterranean.

Built structures

  • Allowances for annual rates of sea-level rise are made in the planning of coastal structures. l Increases in wave heights over the period 1973–1998 are part of the statistical measures that set the design criteria for oil and gas rigs.

Fisheries

  • Excessive fishing pressure over many decades may have resulted in fish populations less able to ‘buffer’ against occasional poor year classes and the impacts of natural climate variability.
  • Distribution shifts and modifications of fish behaviour as a result of temperature changes, may be affecting the vulnerability of certain fish stocks to fishing fleets.

Aquaculture (fish & shellfish farming)

  • In the short term, climate change is unlikely to have a significant effect on UK-farmed marine fish (over 99% of which are cultivated in Scotland) and shellfish (39% in England and Wales; 43% in Northern Ireland; 18% in Scotland for 2006).

Find out more.....Marine Climate Change Impacts website

The Marine Climate Change Impacts Partnership is an interactive website, bringing together the accumulating body of evidence to suggest that many marine ecosystems are responding both physically and biologically to changes in regional climate.

The United Kingdom Marine Climate Change Impacts Partnership (MCCIP) brings together scientists, government, its agencies and NGOs to provide co-ordinated advice on climate change impacts around our coast and in our seas.

Community climate action in the South West

Community climate action in the South West 2007 A movement of the people - community climate action in the South West (Friends of the Earth, 2007) reports on the findings of a survey of community action on climate change in the region carried out by Friends of the Earth during September 2007.

The impetus of this survey was the South West Regional Assembly declaration on climate change in March 2007 and the decision to draw up a South West Climate Change Action Plan.

Key findings include:

  • 267 community groups completed the survey - over 250 of which are involved in activities around climate change
  • Between them they involve over 25,000 people, who give their time almost entirely voluntarily
  • Over 100 community groups have started since 2005
  • The nature of these community groups is diverse, ranging from local groups of established 'green' organisations to scouts, schools, church congregations, Transition Towns and organic farmers
  • 59% of these community groups identify themselves as 'independent'
  • 60% consider climate change to be part of their core concern
  • Climate change related issues being worked on include environmental education (56%), waste & recycling (49%) and energy use & efficiency (48%)
  • Ways of working include awareness events (68%), personal behaviour change (60%) and influencing local policy (42%)

The scale and breadth of this activity shows how great is the public’s appetite for positive action on climate change. It should encourage all South West politicians to show leadership and put their weight behind a strong Climate Bill.

Climate change and marine predators: some warning signals

The impact of climate change on marine predators has been highlighted by the Whale & Dolphin Conservation Society at the UN Convention for Migratory Species, in Nairobi (23rd - 25th November 2005).

The WDCS has presented a report on the impact of climate change on whales, dolphins and porpoises at a special workshop in migratory species and climate change. This report draws attention to the fact that predicting the consequences of climate change on highly mobile marine predators is extremely difficult and are only just being explored.

The vulnerability of certain species was highlighted, including:

  • The highly endangered North Atlantic right whales and the cetaceans with limited habitat such as the river dolphins and the vaquita (found exclusively in the Gulf of Mexico), which will not be able to move away as local conditions change. Little is also known about the situation of many species out on the high seas and that this made initiating conservation plans for them especially difficult.
  • Species that have a relationship to sea ice are especially vulnerable – including seal species that haul-out to rest and breed on ice, polar bears that hunt these seals on the ice, and arctic whale species (belugas, narwhals and bowhead whales) for which the ice forms an important part of their habitat. Changes in Antarctica are especially important because of the high biodiversity there, for example 90% of the world’s great whales feed in Antarctic waters.

Mark Simmonds from the WDCS comments: ‘Whilst we may not know precisely how climate change may impact a vulnerable species, it makes it all the more important that other threats are addressed. In most cases climate change will only make things worse and the North Atlantic Right whale provides an important example of this. Since commercial takes on this species ended, the North Atlantic population has been struggling to survive. Ship strikes and entanglement in nets are the primary causes but loss of prey caused by climate change has now been linked to reduced reproductive success in the population and this is likely to push it more swiftly towards extinction.

Generally speaking, larger populations of animals will be better able to endure climate change, making it all the more imperative that other negative impacts, including commercial takes are ended and species are encouraged to return to historical levels.’

Water resources

Abstractions have increased since the 1970s and water resources are already under great strain in the region, particularly in the east. Over the coming century this will increase as summers become drier. As summer temperatures rise there will be a potential increase in demand for household, irrigation and industrial uses, coinciding with a potential decrease in water supply as rainfall decreases.

Reduced summer rainfall will also mean that there is less water in rivers to dilute pollutants, whilst wetter winters will cause an increase in flushing of nitrates and harmful organisms into groundwater and watercourses, with consequent impacts on water treatment requirements and water quality. Wetter winters will also increase the risk of river and urban flooding: the region saw its worst floods for 60 years in 2001/02. Flooding could also increase soil erosion, sediment mobilization and land slipping as well as cause the over-stressing and backing up of sewer networks.

Impact on Society and Infrastructure

A changing climate will have a major impact on the way we live, the buildings we live in, how we spend our leisure time, where we holiday and how we travel.Built environmentThe built environment, including buildings, bridges, power lines, roads and railways, is already under threat in parts of the region from flooding, extreme winds and storms. Changing rainfall patterns and drier soils will lead to increased flash flooding events and more subsidence. Climatic changes will require building and development design to adapt. New buildings will need to be designed to withstand more frequent clay soil shrinkage, increased rainfall, higher temperatures and stronger winds. Increased use of water efficiency technologies will be needed to reduce water consumption, especially in summer. Milder winters will mean a reduced demand for conventional space heating. Increased solar radiation will make solar heating in winter and cooling in summer possible, but higher temperatures may lead to increased demand for cooling of buildings.Outdoor activities are likely to increase as summer seasons get longer and winters milder. This will influence holiday destinations and timings, increase walking and cycling opportunities as well as use of urban open spaces.

Health

Climate change is already impacting on health. Warmer, sunnier summers are likely to encourage more outdoor leisure and lighter clothing, increasing exposure to the sun and so risks such as skin cancer. Warmer temperatures may increase the incidence of food poisoning and summer heatwaves may increase accidents for workers and cause short-term increases in mortality and ill health in the sick and in older people. Milder winters, however, are likely to reduce winter mortality and injury rates, such as falls on ice, will be reduced.

Cases of malignant melanoma, the most aggressive of skin cancers, is a particular problem in the region with high mortality rates compared to England and Wales. Incidences of this cancer are high in all local authority areas in the region (with the exception of South Gloucestershire, Gloucester and the Forest of Dean), and have increased by 3-7% since the 1960s (Department of Health, 2005).

Tourism and leisure

Tourism is vital to the South West and longer, more reliable summers and warmer winters are likely to extend the tourist season and encourage more UK tourists to holiday at home. At the same time the Mediterranean region may become less hospitable. This will have a positive impact on the economy but could result in unsustainable pressure on the local environment. Rising sea levels and flooding could threaten the existence of some beaches, coastal and riverside amenities.

The region’s heritage, including gardens and historic buildings, could be threatened by both increased visitor pressure and the direct impacts of climate change. More frequent storms, subsidence, light-degradation, rain, fungal and beetle attack and even the failure of historic planting schemes, would diminish attractiveness. Archaeology in uplands could also deteriorate due to drying out in summer, whilst coastal remains could be lost with rising sea levels.

Transport

Damage to railway lineThe main environmental focus for the transport sector has been to reduce the carbon emissions that reduce air quality and contribute to climate change. Less has been done so far in terms of adaptation to protect roads and rail infrastructures from the effects of climate change. Some towns and cities are susceptible to periodic flooding which could increase, causing major disruption to the transport infrastructure. Severe flooding may again sever the main rail link near Exeter, causing major disruption to rail transport. Railways along the coast - such as near Dawlish in Devon - remain vulnerable to storm surges, high tides and cliff instability while tunnels are vulnerable to flooding. Traffic congestion along the region’s roads and motorway could also worsen if tourism increases with warmer summers.

Impact on the Economy

Climate change affects all aspects of life including the region’s economy. If the environment is damaged by climate change the region becomes a less attractive location in which to live and work. If transport links are congested, people will be deterred from coming to the area. Traditional businesses in food and farming may also be threatened. However, climate change may also signal new economic opportunities.

Agriculture, horticulture, forestry and fisheries

Agriculture remains an important economic activity in the region, covering 80% of the land area. It is likely that land management techniques will have to change significantly. For arable farming, warmer and drier summers will lead to longer growing seasons which, with associated higher carbon dioxide levels, could result in increased growth rates and productivity. There may be greater opportunity to grow crops such as sunflowers, navy beans, sweetcorn, grapes and bio-fuels, including vegetable oils in more places, but growing, managing and marketing these will require new skills. However, reduced summer rainfall will increase the need for irrigation at a time when water is more scarce.

Warmer, wetter weather in the winter could potentially increase pests and diseases that would otherwise have been killed off by a harsh winter. This may increase susceptibility to fungal diseases such as Phytopthera, more damage by green spruce aphid, and the prospect of new imported diseases taking hold. Increased winter rainfall also may exacerbate soil erosion leading to increased pollution, blocked drains and damage to rural roads. Waterlogged fields will reduce the number of days when the land can be worked - for example when manure can be spread on fields - and pollution incidences may increase.

Inland fisheries are heavily dependent on salmon and trout in the region. Climate change is likely to have an adverse impact on these species, with repercussions on their contribution to the regional economy. Some coarse fisheries may also be detrimentally affected. Conversely, however, some coarse fisheries may benefit from temperature changes and there may be additional opportunities for developing specialist fisheries for those species dependent on higher temperatures.

Financial services

The financial services industry could find its stability threatened in a number of ways. For example, insurance companies are highly vulnerable to large losses from storms, droughts and floods: warmer winters may reduce cold weather-related claims but there could be more subsidence claims in drier summers. Properties in high-risk areas, primarily floodplains and along unstable coasts, will lose value and may become uninsurable or unsaleable, resulting in losses for lending institutions.

Food and drink

Both raw materials and distribution of food and drink could be adversely affected by climate change. Cooling methods will need to be enhanced to avoid damage to produce and reduce bacterial build-up at higher temperatures. Food and drink consumption patterns will change, for example increased consumption of ice creams, cold drinks and salads in summertime. Increased visitor numbers to the region also means a larger market, particularly for local specialities.

A more local perspective

Climate change in Devon

Devon County Council are currently developing a climate change strategy and welcome your feedback.

Over the past six months a draft climate change strategy has been produced to identify how the Council will deliver on this important commitment. The strategy entitled "A Warm Response – Our Climate Change Challenge” is now available for public comment in a consultation that will end on Friday 27th May 2005.

Click on the link for more information on how you can comment. You can also contact:

Climate Change Officer
Devon County Council
Lucombe House
County Hall
Exeter
EX2 4QW

climatechange@devon.gov.uk

Climate change in Plymouth

A report published in September 2004, found that:

Temperature
  • Temperature records kept at Plymouth since 1874 show a warming trend of 0.5° C over the last 125 years.
  • Four of the ten warmest years within this period have happened since 1989 – these are 1989, 1990, 1995 and 1999.
  • From 1874 to the 1940s there was a warming of 0.8° C, followed by a cooling until the 1960s.
  • The last two decades have shown a rapid return to the temperatures experienced in the 1940s.
Rainfall
  • Plymouth’s rainfall records are also available and show an increased trend since the drought of 1975/76, although there were also periods of increasing rainfall at the start of the last Century (1900) and in the 1920’s.

The impacts and implications of climate change for Plymouth

Climate change in Cheltenham

The Climate Change Strategy for Cheltenham (2004) identified the potential impacts on the area as:

Higher temperatures
  • Less demand for winter heating, which may reduce fuel bills and fuel poverty
  • Longer growing season for crops, lawns and flowers, less hardy species will survive better, but so will weeds, pests and diseases
  • Increased potential for outdoor activities, encouraging the ‘café culture’, but could lead to more intensive use of parks and green spaces
  • Could attract more visitors to Cheltenham, benefiting tourism sector, but increasing pressure on infrastructure
  • Increasing demand for electricity in the summer to cool buildings
  • More deaths from higher temperatures, higher risk of food poisoning and tropical diseases
  • Working conditions could be uncomfortable in summer
Wetter winters
  • Increased flooding risk, especially in floodplain areas, and difficulties in getting insurance cover
  • Increased risk of damp in older buildings
More storms and weather extremes
  • More building damage from storms and subsidence, increasing insurance premiums
  • Disruption to telecommunications and transport from weather extremes
  • Road surfaces requiring more frequent repairs
Drier summers
  • Water shortages in summer, which will impact on vegetation and wildlife
  • Traditional species of trees could suffer from drought, which could threaten existing habitats
General impact
  • New business opportunities likely in renewable energy, new building and environmental technology

Climate change in Bristol

The Bristol Climate Protection and Sustainable Energy Strategy (2004) identifies the impacts of climate change on the area as being:

Flooding and Storm Damage
  • Many of the rivers in the city are at risk from flooding, as is the harbour, and the sea defences at Avonmouth will need to be reviewed as sea levels rise.
Health
  • Summer death rates and hospital admissions could rise as the frequency of very hot spells increase but winter cold related deaths should reduce.
  • Stomach upsets and food poisoning may also increase and an increase in the rat population may have health impacts.
Tourism and Leisure
  • A warmer summer season is likely to lead to an increase in visitor numbers, which is good for the economy but will put pressure on the city’s services and utilities including transport, water supplies, waste management, emergency services and health care.
Ecological Impacts
  • As sea level rises more flood defences will be needed, changes in the water table will affect habitats, plant growth rates will increase with warmer temperatures, and soil erosion and storm damage could increase.
Industry and Commerce
  • Extreme weather events could affect supply chains.
  • Building design will need to meet the demand for more energy efficient buildings as well as cooling during the summer months.
  • Insurance claims for storms, floods and subsidence are all likely to rise.
Utilities and Infrastructure
  • Flooding and storm damage will affect transport infrastructure and changes in water supplies will lead to higher costs in meeting demand.

Survival of UK plants & animals in a changing climate

The MONARCH reportAction is needed now to prevent the loss of some of the UK's most valued plants and wildlife as a result of climate change, according to a new report launched on the 22nd May 2007 by Natural England.

The MONARCH report illustrates potential impacts of climate change on some of our most rare or threatened species, under different projected levels of greenhouse gas emissions to the 2080s.

The report is the result of a seven-year research programme, led by Natural England in partnership with conservation bodies throughout the UK. It has been written in response to climate change - the most serious threat to biodiversity in the 21st Century. The MONARCH report highlights the need to consider biodiversity issues in all adaptation planning across the UK. Successful adaptation measures for nature conservation need decades to become effective.

Key findings of the MONARCH report:

The MONARCH programme studied the projected change in suitable climate for 120 rare or threatened species that are currently being conserved through the UK Biodiversity Action Plan. 32 of these were explored in detail and it was found that a majority are likely to experience changes in the location and/or extent of areas where the climate will meet their requirements:

  • The areas of suitable climate may become much reduced across much of Britain and Ireland, for eight of them, including birds (common scoter, song thrush, black grouse, capercaillie) and plants (twinflower and oblong woodsia) that may as a result become increasingly, and potentially seriously, threatened.
  • Six may have to move northwards if they are to survive; stag beetle, Barbastelle bat, tower mustard, cornflower, cut-grass and floating water plantain.
  • Fifteen may be able to extend their range as the climate becomes more suitable for them across a wider area, including turtle dove, pearl-bordered fritillary butterfly, greater horseshoe bat, red hemp-nettle, and small-flowered catchfly.

This illustrates the urgent need to reduce habitat fragmentation and so ensure that species are able to disperse and establish in new locations as the climate changes.

Changes to where species may find the climate suitable will be more severe unless greenhouse gas emissions are cut. If emissions can be reduced, the risk of extinction is reduced for those at risk of losing climatically suitable areas in Britain and Ireland.

Case studies

Song Thrush - projected loss of areas where it will find suitable climate

The song thrush is present throughout Britain and Ireland. Hotter, drier summers are thought to have contributed to the decline of the song thrush in the south east of its UK range because drought reduced the numbers of snails, slugs and earthworms, that it feeds on. Significant loss of suitable climate space in southern England is projected to occur later this century. Under the 2080s High greenhouse gas emission scenario the impact may be dramatic, affecting most of England, Wales and Ireland.

Stag Beetle - shift in areas where it will find suitable climate

This beetle is confined to southern England in the UK as it is at the northern edge of its range. However, it has historically been recorded across England as far north as Cumbria. An expansion of suitable climate space is projected across most of Britain and Ireland under the High greenhouse gas emissions scenario. Some of the existing distribution, including strongholds of the species in south east England, are projected to be lost as a hotter and drier climate develops.

Greater horseshoe bat - projected gain in areas where it will find suitable climate

Within Britain, the greater horseshoe bat is confined to southwest England and south and west Wales, while being absent from Ireland. Individuals have been recorded as travelling up to 180 km. Recent records show that individual bats from south Wales colonies are overwintering in north Wales so there is likely to be potential for establishment of new breeding colonies at distance. The projected extension of climate space across Britain and Ireland contrasts with the distinctly south-western distribution at present.

Impact of climate change on our seasons

A Europe-wide study has provided "conclusive proof" that climate change is responsible for spring arriving earlier each year.

Scientists from 17 nations examined 125,000 studies involving 561 species between 1971 and 2000, in what has been described as the world's largest study of changes in recurring natural events, such as when plants flowered.

The study, published in the journal Global Change Biology, provided conclusive proof that changes to the continent's climate were affecting the timing of the seasons, the scientists said.

The report does not go as far as pointing the finger of blame at human-induced climate change but it does show that there is a direct link between rising temperatures and changes to plant & animal behaviour.

The results show that 78% of all leafing, flowering and fruiting records were happening earlier in the year, while only 3% were significantly delayed.

Horse chestnut trees, which grow all over the continent, were particularly good indicators, as they are easy to identify and have distinctive phases of leafing, flowering and producing conkers.

It is now hoped that the findings will focus attention on the potential consequences of changes to the behaviour of plants and animals - such as the impacts on the food chain. Caterpillars, for example, feed on oak trees, and birds feed on the caterpillars. Unless these species remain synchronised, there could be problems for any one or more of those elements of the food web.

The full paper is available to download from the journal Global Change Biology (charge applicable).

Google Earth: new vision of climate change

Millions of Google Earth users around the world will be able to see how climate change could affect the planet and its people over the next century, along with viewing the loss of Antarctic ice shelves over the last 50 years.

Climate Change in Our World, launched by Prime Minister Gordon Brown at the Google Zeitgeist conference today, is the product of a collaboration between Google, the UK Government, the Met Office Hadley Centre and the British Antarctic Survey. It provides two new ‘layers’, or animations, available to all users of Google Earth.

One animation uses leading climate science from the UK’s Met Office Hadley Centre to show world temperatures throughout the next hundred years under medium projections of greenhouse gas emissions. It also shows stories of how people in the UK and in some of the world’s poorest countries are already being affected by changing weather patterns.

The animation contains information on action that can be taken by individuals, communities, businesses and governments to tackle climate change, and highlights good work already underway.

Another animation, developed by the British Antarctic Survey, shows the retreat of Antarctic ice caps since the 1950s, and features facts about climate change science and impacts in the Antarctic.

The project currently provides a snapshot of some of the recent scientific information about climate change and its impacts. The partners in the project will be looking to develop these ideas further in the future, preferably with additional partners.

 

Climate Challenge website

Climate Challenge is a new website that highlights the importance of talking about climate change.

Climate change is one of the biggest challenges we face today. The first step towards tackling the problem is to make sure everyone understands exactly what the challenge is and the difference they could make. That's why talking about climate change is so important. We need to educate, excite and inspire others so that we can start working together to tackle climate change. The information on this site can help you understand, and tell the climate change story.

It is part of the Climate Change Communication Initiative led by Defra, in partnership with the Environment Agency, the Carbon Trust, the Energy Saving Trust, the UK Climate Impacts Programme, the Department for Transport and the Department of Trade and Industry.

Facilities on this website include:

Understand climate change
  • Learn more about the facts and effects of climate change
Communicate climate change
  • Discover the best ways to communicate climate change
Get involved
  • Gather the information and tools you need

An interactive map also currently highlights