This article reviews recent climatically extreme periods in Great Britain and presents results from the latest general circulation model (GCM) experiments showing the possible spatial patterns and magnitude of future climate change for this region. During the last decade the British Isles has seen record-breaking periods of above-average temperatures, alongside periods with above and below-average precipitation, combined with an increase in winter precipitation and a decrease in summer precipitation. The impacts of these anomalies, coupled with the possibility that future climate change may increase their frequency and/or severity, have prompted the UK Department of the Environment, Transport and Regions and other organizations involved in environmental management, such as the Environment Agency, to commission a number of studies into their impacts. These have highlighted wide-ranging impacts on the natural environment of Great Britain and on human ativities to the extent of affecting the national economy.
The use of GCMs for the development of future climate change scenarios is reviewed. Results from recent ensemble GCM experiments with and without the effects of sulphate aerosols are presented. These show broadly similar changes in temperature and precipitation to previous climate change scenarios prepared for Great Britain. In summary, the scenarios suggest the following: a warming of about 3 8C (3.5 8C) over the region by 2100 with (without) the effects of sulphate aerosols; slight increases in annual precipitation over northern England and Scotland, more pronounced increases over the whole of the region in winter; and slight decreases in precipitation over Wales and central England in summer. These changes are synchronous with decreases in the number of wet-days and increases in the intensity of precipitation on wet-days. The high level of uncertainty associated with regional scenarios of temperature and precipitation is discussed and emphasized
Arnell, N. W., Jenkins, A. and George, D. G.1994: The implications of climate change for the National Rivers Authority. Final report (R&D report 12) to National Rivers Authority. London: HMSO.
2.
Arnell, N., Reynard, N., King, R., Prudhommme, C. and Branson, J.1997: Effects of climate change on river flows and groundwater recharge; guidelines for resource assessment. Environment Agency Technical Report W82. London: UK Water Industry Research Ltd.
3.
Barnett, T. P. and Schlesinger, M. E.1987: Detecting changes in global climate induced by greenhouse gases. Journal of Geophysical Research92, 14772-14780.
4.
Barrow, E. M. and Hulme, M.1996: Changing probabilities of daily temperature extremes in the UK related to future global warming and changes in climate variability. Climate Research6, 21-31.
5.
Cannell, M. G. R. and Pitcairn, C. E. R.1993: Impacts of the mild winters and hot summers in the United Kingdom in 1988-1990. London: HMSO.
6.
CCIRG (Climate Change Impacts Review Group)1991: The potential effects of climate change in the United Kingdom. London: Department of the Environment/HMSO.
7.
CCIRG (Climate Change Impacts Review Group)1996: Review of the potential effects of climate change in the United Kingdom. London: Department of the Environment/HMSO.
8.
Conway, D. and Jones, P. D.1996: POPSICLE -Production of Precipitation Scenarios for Climate Impacts in Europe. Final report (European Community Environment Research Programme, contract: EV5V-CT-94-0510). Norwich: Climatic Research Unit.
9.
Cubasch, U., Hasselmann, K., Hö ck, H., Maier-Reimer, E., Mikola-Jewicz, U., Santer, B. D. and Sausen, R.1992: Time-dependent greenhouse warming computations with a coupled ocean-atmosphere model. Climate Dynamics8, 55-69.
10.
Foster, M., Werrity, A. and Smith, K. 1997: The nature, causes and impacts of recent hydro-climatic variability in Scotland and Northern Ireland. In Proceedings of the 6th BHS National Hydrology Symposium, Salford.
11.
Hennessy, K. J., Gregory, J. M. and Mitchell, J. F. B.1997: Changes in daily precipitation under enhanced greenhouse conditions. Climate Dynamics13, 667-680.
12.
Houghton, J. R., Jenkins, G. J. and Ephraums, J. J., editors, 1990: Climate change: the IPCC scientific assessment. Cambridge: Cambridge University Press.
13.
Houghton, J. R., Meira Filho, L. G., Callander, B. A., Harris, N., Kattenberg, A. and Maskell, K., editors, 1996: Climate change 1996: the science of climate change. Cambridge: Cambridge University Press.
14.
Hulme, M.1996a: Global warming. Progress in Physical Geography20, 216-223.
15.
Hulme, M.1996b: Climate change and southern Africa: an exploration of some potential impacts and implications in the SADC region. Norwich: Climatic Research Unit and WWF International.
16.
Hulme, M.1997a: Global warming. Progress in Physical Geography21, 446-453.
17.
Hulme, M.1997b: The climate in the UK from November 1994 to October 1995. Weather53, 242-257.
18.
Hulme, M. and Barrow, E., editors, 1997: Climates of the British Isles, present, past and future. London: Routledge.
19.
Hulme, M., Barrow, E. M., Jenkins, G. J., New, M., Osborn, T. J. and Viner, D.1998: Climate change scenarios for the UK Climate Impacts Programme. UKCIP Technical Report. Norwich: Climatic Research Unit.
20.
Jones, P. D. and Conway, D.1997: Precipitation in the British Isles: an analysis of area-average data updated to 1995. International Journal of Climatology17, 427-438.
21.
Jones, P. D., Conway, D. and Briffa, K. R.1997: Precipitation variability and drought. In Hulme, M. and Barrow, E., editors, Climates of the British Isles, present, past and future, London: Routledge, 197-219.
22.
Jones, P. D. and Hulme, M.1997: The changing temperature of ‘central England'. In Hulme, M. and Barrow, E., editors, Climates of the British Isles, present, past and future, London: Routledge, 173-198.
23.
Kelly, P. M. K., Jones, P. D. and Briffa, K. R.1997: Classifying the winds and weather. In Hulme, M. and Barrow, E., editors, Climates of the British Isles, present, past and future, London: Routledge, 153-172.
24.
Klein Tank, A. M. G. and Kö nnen, G. P.1997: Simple temperature scenario for a Gulf Stream induced climate change. Climatic Change37, 505-512.
25.
Leggett, J., Pepper, W. J. and Swart, R. J.1992: Emissions scenarios for the IPCC: an update. In Houghton, J. T., Callander, B. A. and Varney, S. K., editors, Climate change 1992: the supplementary report to the IPCC scientific assessment, Cambridge: Cambridge University Press, 75-95.
26.
Marsh, T. J. and Turton, P. S.1996: The 1995 drought -a water resources perspective. Weather51, 46-53.
27.
Mitchell, J. F. B. and Johns, T. C.1997: On the modification of global warming by sulphate aerosols. Journal of Climate10, 245-267.
28.
Mitchell, J. F. B., Johns, T. C. and Davis, R. A.1998: Towards the construction of climate change scenarios. Climatic Change (in press).
29.
Mitchell, J. F. B., Johns, T. C., Gregory, J. M. and Tett, S. F. B.1995: Climate response to increasing levels of greenhouse gases and sulphate aerosols. Nature376, 501-504.
30.
Osborn, J. T.1997: Areal and point precipitation changes: implications for the application of climate models. Geophysical Research Letters24, 2829-2832.
31.
Palutikof, J., Holt, T. and Skellern, A.1997a: Wind: resource and hazard. In Hulme, M. and Barrow, E., editors, Climates of the British Isles, present, past and future, London: Routledge, 220-242.
32.
Palutikof, J. P., Subak, S. and Agnew, M. D., editors, 1997b: Economic impacts of the hot summer and unusually warm year of 1995. Report for the Department of the Environment. Norwich: University of East Anglia.
33.
Parry, M. L., Carter, T. R. and Hulme, M.1996: What is a dangerous climate change?Global Environmental Change6, 1-6.
34.
Parry, M. L., Hossell, J. E., Jones, P. J., Rehman, T., Tranter, R. B., Marsh, J. S., Rosenzweig, C., Fischer, G., Carson, I. G. and Bunce, R. G. H.1996: Integrating global and regional analyses of the effects of climate change: a case study of land use in England and Wales. Climatic Change32, 185-198.
35.
Perry, A.1996: IPCC second assessment and beyond. Progress in Physical Geography20, 477-481.
36.
Raper, S. C., Viner, D., Hulme, M. and Barrow, E.1997: Global warming and the British Isles. In Hulme, M. and Barrow, E., editors, Climates of the British Isles, present, past and future, London: Routledge, 326-339.
37.
Santer, B. D., Taylor, K. E., Penner, J. E., Wigley, T. M. L., Jones, P. D. and Cubasch, U.1995: Towards the detection and attribution of an anthropogenic effect on climate. Climate Dynamics12, 77-100.
38.
Santer, B. D., Taylor, K. E., Wigley, T. M. L., Johns, T. C., Jones, P. D., Karoly, D. J., Mitchell, J. F. B., Oort, A. H., Penner, J. E., Ramaswamy, V., Schwarzkopf, M. D., Stouffer, R. J. and Tetts, S.1996: A search for human influences on the thermal structure of the atmosphere. Nature382, 39-46.
39.
Santer, B. D., Wigley, T. M. L. and Jones, P. D.1993: Correlation methods in fingerprint detection studies. Climate Dynamics9, 267-285.
40.
Smith, K.1995: Precipitation over Scotland, 1757-1992: some aspects of variability. Journal of Climatology15, 543-556.
41.
Subak, S.1997: Conclusions. In Palutikof, J. P., Subak, S. and Agnew, M. D., editors, Economic impacts of the hot summer and unusually warm year of 1995. Report for the Department of the Environment, Norwich: University of East Anglia, 171-178.
42.
Subak, S., Palutikof, J. P., Agnew, M. D., Watson, S. J., Bentham, C. G., Cannell, M. G. R., Crowards, T., Hulme, M., McNally, S., Sparks, T. H., Thomes, J. F., Turner, R. K., Waughray, D. and Woods, J. C.1998: The impact of the anomalous weather of 1995 on the UK economy. Climatic Change (in press).
43.
Watson, R. T., Zinyowera, M. C. and Moss, R. H., editors, 1996: Climate change 1995: impacts, adaptations and mitigation of climate change. Scientific and technical analyses. Contribution of Working Group II to the second assessment report of the IPCC. Cambridge: Cambridge University Press.
44.
Watson, R. T., Zinyowera, M. C., Moss, R. H. and Dokken, D. J., editors, 1998: The regional impacts of climate change: an assessment of vulnerability. A special report of Working Group II of the IPCC. Cambridge: Cambridge University Press.
45.
Wigley, T. M. L.1998: The Kyoto Protocol: CO2, CH4 and climate. Geophysical Research Letters (in press).
46.
Wilby, R. L.1995: Greenhouse hydrology. Progress in Physical Geography19, 351-369.
47.
Wilby, R. L. and Wigley, T. M. L.1997: Downscaling general circulation model output: a review of methods and limitations. Progress in Physical Geography21, 530-548.
