DOI: 10.1002/2017JD027463
Scopus记录号: 2-s2.0-85041742135
论文题名: Evaluation of Precipitation From EURO-CORDEX Regional Climate Simulations in a Small-Scale Mediterranean Site
作者: Mascaro G. ; Viola F. ; Deidda R.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2018
卷: 123, 期: 3 起始页码: 1604
结束页码: 1625
语种: 英语
英文关键词: Interannual variability
; Orographic Effect
; Precipitation
; Regional climate models
; Seasonal variability
; Trend
英文摘要: The evaluation of regional climate models' (RCMs') ability to reproduce the present-day climate is critical to support their utility in impact studies under future climatic scenarios. This study evaluates the skill of an ensemble of state-of-the-art regional climate simulations from the European Coordinated Regional Downscaling Experiment initiative in reproducing the precipitation (P) properties in Sardinia, a Mediterranean island of ~24,000 km2. The ensemble includes simulations at 0.44° and 0.11° grid spacing of the “Historical” experiment from 1950 to 2005. Precipitation records from a high-density network of gauges are used as reference data set. The interannual and seasonal climatology of P, presence of trend, and orographic effect are assessed at the original RCM grid spacings and different spatial scales of aggregation. Most models capture the observed positive relation between annual P and elevation, with better performance at 0.11° spacing. The simulated spatial patterns of the climatological annual and seasonal means are well correlated with the observation at both spacings, but their spatial variability is overestimated. Positive and negative bias of up to ±60% are found in the simulation of annual mean and interannual variability. While the majority of the models reproduce the phase of the seasonal cycle, they underestimate (overestimate) winter (summer) P. The RCMs exhibit different deficiencies in capturing the negative annual and seasonal observed trends. In general, models' skill degrades when analyses are conducted at smaller aggregation scales. Results of this study reveal insight on RCM performances in small-scale regions, which are often targeted by impact studies and have so far received less attention. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114478
Appears in Collections: 气候减缓与适应
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作者单位: School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, AZ, United States; Dipartimento di Ingegneria Civile, Ambientale ed Architettura Università degli Studi di Cagliari, Cagliari, Italy
Recommended Citation:
Mascaro G.,Viola F.,Deidda R.. Evaluation of Precipitation From EURO-CORDEX Regional Climate Simulations in a Small-Scale Mediterranean Site[J]. Journal of Geophysical Research: Atmospheres,2018-01-01,123(3)