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DOI	10.5194/hess-22-3933-2018
	Mean and extreme precipitation over European river basins better simulated in a 25 km AGCM
	Schiemann R.; Luigi Vidale P.; Shaffrey L.C.; Johnson S.J.; Roberts M.J.; Demory M.-E.; Mizielinski M.S.; Strachan J.
发表日期	2018
ISSN	1027-5606
起始页码	3933
结束页码	3950
卷号	22 期号:7
英文摘要	Limited spatial resolution is one of the factors that may hamper applications of global climate models (GCMs), in particular over Europe with its complex coastline and orography. In this study, the representation of European mean and extreme precipitation is evaluated in simulations with an atmospheric GCM (AGCM) at different resolutions between about 135 and 25 km grid spacing in the mid-latitudes. The continent-wide root-mean-square error in mean precipitation in the 25 km model is about 25 % smaller than in the 135 km model in winter. Clear improvements are also seen in autumn and spring, whereas the model's sensitivity to resolution is very small in summer. Extreme precipitation is evaluated by estimating generalised extreme value distributions (GEVs) of daily precipitation aggregated over river basins whose surface area is greater than 50 000 km2. GEV location and scale parameters are measures of the typical magnitude and of the interannual variability of extremes, respectively. Median model biases in both these parameters are around 10 % in summer and around 20 % in the other seasons. For some river basins, however, these biases can be much larger and take values between 50 % and 100 %. Extreme precipitation is better simulated in the 25 km model, especially during autumn when the median GEV parameter biases are more than halved, and in the North European Plains, from the Loire in the west to the Vistula in the east. A sensitivity experiment is conducted showing that these resolution sensitivities in both mean and extreme precipitation are in many areas primarily due to the increase in resolution of the model orography. The findings of this study illustrate the improved capability of a global high-resolution model in simulating European mean and extreme precipitation. © Author(s) 2018.
语种	英语
scopus关键词	Estimation; Mean square error; Precipitation (meteorology); Rivers; Watersheds; Daily precipitations; Different resolutions; Extreme precipitation; Generalised extreme value distributions; High-resolution models; Interannual variability; Location and scale parameters; Root mean square errors; Climate models; atmospheric general circulation model; climate modeling; experimental study; extreme event; global climate; precipitation (climatology); precipitation assessment; river basin; simulation; spatial resolution; Auvergne-Rhone-Alpes; Europe; France; Loire; Poland [Central Europe]; Vistula Basin
来源期刊	Hydrology and Earth System Sciences
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/159965
作者单位	Schiemann, R., National Centre for Atmospheric Science, Department of Meteorology, University of Reading, Reading, United Kingdom; Luigi Vidale, P., National Centre for Atmospheric Science, Department of Meteorology, University of Reading, Reading, United Kingdom; Shaffrey, L.C., National Centre for Atmospheric Science, Department of Meteorology, University of Reading, Reading, United Kingdom; Johnson, S.J., National Centre for Atmospheric Science, Department of Meteorology, University of Reading, Reading, United Kingdom, European Centre for Medium-Range Weather Forecasts, Reading, United Kingdom; Roberts, M.J., Met Office Hadley Centre, Exeter, United Kingdom; Demory, M.-E., National Centre for Atmospheric Science, Department of Meteorology, University of Reading, Reading, United Kingdom, Center for Space and Habitability, University of Bern, Bern, Switzerland; Mizielinski, M.S., Met Office Hadley Centre, Exeter, United Kingdom; Strachan, J., National Centre for Atmospheric Science, Department of Meteoro...
推荐引用方式 GB/T 7714	Schiemann R.,Luigi Vidale P.,Shaffrey L.C.,et al. Mean and extreme precipitation over European river basins better simulated in a 25 km AGCM[J],2018,22(7).
APA	Schiemann R..,Luigi Vidale P..,Shaffrey L.C..,Johnson S.J..,Roberts M.J..,...&Strachan J..(2018).Mean and extreme precipitation over European river basins better simulated in a 25 km AGCM.Hydrology and Earth System Sciences,22(7).
MLA	Schiemann R.,et al."Mean and extreme precipitation over European river basins better simulated in a 25 km AGCM".Hydrology and Earth System Sciences 22.7(2018).