Regional climate‐model predictions of extreme rainfall for a changing climate

Quarterly Journal of the Royal Meteorological Society - Tập 129 Số 590 - Trang 1607-1621 - 2003
Chris Huntingford1, Richard Jones2, Christel Prudhomme1, Rob Lamb1, J. H. C. Gash1, David Jones1
1Centre for Ecology and Hydrology, Wallingford, UK
2Met Office, Hadley Centre for Climate Prediction and Research, Bracknell, UK

Tóm tắt

AbstractMajor floods occurred in the United Kingdom during autumn 2000. These were caused by a rapid sequence of heavy rainfall events that occurred over a period of many weeks leading to record‐breaking monthly‐to‐seasonal rainfall totals. The question was raised as to whether such rainfall events may be related to human‐induced climate change.Climate‐model predictions of future changes in mean precipitation behaviour are well established. However, to understand flooding requires an examination of predictions of extreme rainfall behaviour at a relatively small spatial scale. For three areas within the United Kingdom, output from a Hadley Centre regional climate model, ‘nested’ within one of its general‐circulation models, is compared with raingauge data averaged over these areas for the period 1961–1990. This shows that the modelling system is good at predicting the statistical likelihood of extreme rainfall events seen in historical data. This result holds for extreme rainfall totals over daily to monthly timescales.When the modelling system is used to predict changes in these extreme events resulting from atmospheric CO2 concentrations that may be representative of the period 2080–2100, significant reductions in the return periods of such events are seen. For example, 30‐day rainfall totals, which happened in the recent past on average once in 20 years, are predicted to happen once in 3–5 years. An interpolation method based upon climate‐model output and incorporating raingauge data is used to estimate how rainfall extremes may have changed between the middle of the 19th century, and for a period centred on the year 2000. This also predicts that increased greenhouse gases have led to reduced return periods of extreme rainfall events for three sites of interest, though in this case the changes are not statistically significant. © Royal Meteorological Society, 2003. R. G. Jones's contribution is Crown copyright

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Tài liệu tham khảo

Cubasch U., 2001, Climate change 2001: The scientific basis. Contribution of Working Group I to the Third Assessment Report of the Intergovernmental Panel on Climate Change, 525

10.1002/qj.49712757316

Folland C. K., 2001, Climate change 2001: The scientific basis. Contribution of Working Group I to the Third Assessment Report of the Intergovernmental Panel on Climate Change, 525

Giorgi F., 2001, Climate change 2001: The scientific basis. Contribution of Working Group I to the Third Assessment Report of the Intergovernmental Panel on Climate Change, 525

10.1029/2001GL013150

10.1007/s003820050189

Hulme M.andJenkins G. J.1998‘Climate‐change scenarios for the UK: Scientific report’. UKCIP Technical Report 1 Climatic Research Unit School of Environmental Sciences University of East Anglia Norwich UK

Hulme M., 2002, ‘Climate‐change scenarios for the UK: The UKCIP02 scientific report’

10.1007/s003820000067

IPCC, 2000, Special report on emissions scenarios

JCHMR2001‘To what degree can the October/November 2000 flood events be attributed to climate change?’. FD2304 Technical Report Commissioned research report to Ministry for Agriculture Fisheries and Food (Available from the Centre for Ecology and Hydrology Wallingford Oxfordshire OX10 8BB UK)

10.1007/s003820050155

10.1002/joc.677

10.1002/qj.49712152610

Jones R. G., 1997, Simulation of climate change over Europe using a nested regional‐climate model. 2. Comparison of driving and regional model responses to a doubling of carbon dioxide, Q. J. R. Meteorol. Soc., 123, 265

Jones S. B.1983‘The estimation of catchment average point rainfall profiles’. Report 87 Institute of Hydrology Wallingford Oxfordshire OX10 8BB UK

Levitus S.1982‘Climatological atlas of the world ocean’. Professional paper 13 National Oceanic and Atmospheric Administration Rockville Maryland USA

10.1002/j.1477-8696.2001.tb06503.x

10.1175/1520-0442(1999)012<2256:AEOSAD>2.0.CO;2

10.1038/415512a

10.1002/hyp.1054

Reynard N. S., 1999, Final report to MAFF, Project FD0424‐C

Robson A., 1999, ‘Statistical procedures for flood frequency estimation’

Santer B. D. Wigley T. M. L. Schlesinger M. E.andMitchell J. F. B.1990‘Developing climate scenarios from equilibrium GCM results’. Report 47 Max‐Planck Institut für Meteorologie Hamburg Germany

10.1029/2000JD000028

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Quarterly Journal of the Royal Meteorological Society

Tập 129 Số 590

1607-1621

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