Modelling daily temperature extremes: recent climate and future changes over Europe

Probability distributions of daily maximum and minimum temperatures in a suite of ten RCMs are investigated for (1) biases compared to observations in the present day climate and (2) climate change signals compared to the simulated present day climate. The simulated inter-model differences and climate changes are also compared to the observed natural variability as reflected in some very long instrumental records. All models have been forced with driving conditions from the same global model and run for both a control period and a future scenario period following the A2 emission scenario from IPCC. We find that the bias in the fifth percentile of daily minimum temperatures in winter and at the 95th percentile of daily maximum temperature during summer is smaller than 3 (±5°C) when averaged over most (all) European sub-regions. The simulated changes in extreme temperatures both in summer and winter are larger than changes in the median for large areas. Differences between models are larger for the extremes than for mean temperatures. A comparison with historical data shows that the spread in model predicted changes in extreme temperatures is larger than the natural variability during the last centuries.

[1]  A. K. Tank,et al.  Trends in Indices of Daily Temperature and Precipitation Extremes in Europe, 1946–99 , 2003 .

[2]  Richard G. Jones,et al.  An inter-comparison of regional climate models for Europe: model performance in present-day climate , 2007 .

[3]  U. Willén,et al.  GCM driven simulations of recent and future climate with the Rossby Centre coupled atmosphere - Baltic Sea regional climate model RCAO , 2003 .

[4]  D. Camuffo,et al.  Trends of Extreme Temperatures in Europe and China Based on Daily Observations , 2002 .

[5]  E. Kjellström.  Recent and Future Signatures of Climate Change in Europe , 2004, Ambio.

[6]  Ole Einar Tveito,et al.  Temperature and precipitation scenarios for Norway: comparison of results from dynamical and empirical downscaling , 2003 .

[7]  The Regional climate , 2004 .

[8]  D. Lüthi,et al.  The role of increasing temperature variability in European summer heatwaves , 2004, Nature.

[9]  E. Kjellström.  Recent and future signatures of climate change in Europe. , 2004 .

[10]  U. Willén,et al.  The Rossby Centre Regional Atmospheric Climate Model part II: application to the Arctic climate. , 2004, Ambio.

[11]  J. Murphy,et al.  Sources of systematic errors in the climatology of a regional climate model over Europe , 1998 .

[12]  P. Jones,et al.  Regional climate model simulations of daily maximum and minimum near-surface temperatures across Europe compared with observed station data 1961–1990 , 2004 .

[13]  A. M. G. Klein,et al.  Trends in Indices of Daily Temperature and Precipitation Extremes in Europe, 1946-99 , 2003 .

[14]  David P. Rowell,et al.  A scenario of European climate change for the late twenty-first century: seasonal means and interannual variability , 2005 .

[15]  F. Giorgi,et al.  An intercomparison of regional climate simulations for Europe: assessing uncertainties in model projections , 2007 .

[16]  Raquel V. Francisco,et al.  Regional Climate Information—Evaluation and Projections , 2001 .

[17]  D. Stephenson,et al.  Future extreme events in European climate: an exploration of regional climate model projections , 2007 .

[18]  M. Noguer,et al.  Climate change 2001: The scientific basis. Contribution of Working Group I to the Third Assessment Report of the Intergovernmental Panel on Climate Change , 2002 .

[19]  Jean-François Mahfouf,et al.  The representation of soil moisture freezing and its impact on the stable boundary layer , 1999 .

[20]  E. van Meijgaard,et al.  Summertime inter-annual temperature variability in an ensemble of regional model simulations: analysis of the surface energy budget , 2007 .

[21]  M. Rummukainen,et al.  Evaluating the performance and utility of regional climate models: the PRUDENCE project , 2007 .

[22]  Dario Camuffo,et al.  Improved Understanding of Past Climatic Variability from Early Daily European Instrumental Sources , 2002 .

[23]  B. Hurk,et al.  Circulation statistics and climate change in Central Europe: PRUDENCE simulations and observations , 2007 .

[24]  Anders Moberg,et al.  Daily dataset of 20th‐century surface air temperature and precipitation series for the European Climate Assessment , 2002 .

[25]  C. Schär,et al.  Soil Control on Runoff Response to Climate Change in Regional Climate Model Simulations , 2005 .

[26]  D. Lüthi,et al.  European summer climate variability in a heterogeneous multi-model ensemble , 2007 .

[27]  R. Jones,et al.  On the robustness of changes in extreme precipitation over Europe from two high resolution climate change simulations , 2007 .

[28]  David B. Stephenson,et al.  Simple nonparametric techniques for exploring changing probability distributions of weather , 2005 .

[29]  J. Houghton,et al.  Climate change 2001 : the scientific basis , 2001 .