DOI: 10.1007/s00382-013-1796-7
Scopus记录号: 2-s2.0-84899928222
论文题名: How well are daily intense rainfall events captured by current climate models over Africa?
作者: Crétat J. ; Vizy E.K. ; Cook K.H.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2014
卷: 42, 期: 2017-09-10 起始页码: 2691
结束页码: 2711
语种: 英语
英文关键词: Africa
; CMIP5 AGCMs/AOGCMs
; Daily intense rainfall
; Regional climate model
英文摘要: The ability of state-of-the-art climate models to capture the mean spatial and temporal characteristics of daily intense rainfall events over Africa is evaluated by analyzing regional climate model (RCM) simulations at 90- and 30-km along with output from four atmospheric general circulation models (AGCMs) and coupled atmosphere-ocean general circulation models (AOGCMs) of the Climate Model Intercomparison Project 5. Daily intense rainfall events are extracted at grid point scale using a 95th percentile threshold approach applied to all rainy days (i.e., daily rainfall ≥1 mm day-1) over the 1998-2008 period for which two satellite-derived precipitation products are available. Both RCM simulations provide similar results. They accurately capture the spatial and temporal characteristics of intense events, while they tend to overestimate their number and underestimate their intensity. The skill of AGCMs and AOGCMs is generally similar over the African continent and similar to previous global climate model generations. The majority of the AGCMs and AOGCMs greatly overestimate the frequency of intense events, particularly in the tropics, generally fail at simulating the observed intensity, and systematically overestimate their spatial coverage. The RCM performs at least as well as the most accurate global climate model, demonstrating a clear added value to general circulation model simulations and the usefulness of regional modeling for investigating the physics leading to intense events and their change under global warming. © 2013 Springer-Verlag Berlin Heidelberg. 资助项目: DOE, U.S. Department of Energy
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54421
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Geological Sciences, Jackson School of Geosciences, The University of Texas at Austin, 1 University Station C1100, Austin, TX, 78712, United States
Recommended Citation:
Crétat J.,Vizy E.K.,Cook K.H.. How well are daily intense rainfall events captured by current climate models over Africa?[J]. Climate Dynamics,2014-01-01,42(2017-09-10)