DOI: 10.1007/s00382-015-2807-7
Scopus记录号: 2-s2.0-84949560963
论文题名: Evaluation of extreme rainfall and temperature over North America in CanRCM4 and CRCM5
作者: Whan K. ; Zwiers F.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2016
卷: 46, 期: 2017-11-12 起始页码: 3821
结束页码: 3843
语种: 英语
英文关键词: CORDEX
; ETCCDI
; Extremes
; Model evaluation
; Regional climate model
英文摘要: We assess the ability of two Canadian regional climate models (RCMs), CanRCM4 and CRCM5, to simulate North American climate extremes over the period 1989–2009. Both RCMs use lateral boundary conditions derived from the ERA-Interim reanalysis and share the same dynamical core but use different nesting strategies, land-surface and physics schemes. The annual cycle and spatial patterns of extreme temperature indices are generally well reproduced in both models but the magnitude varies. In central and southern North America, maximum temperature extremes are up to 7 °C warmer in CanRCM4. There is a cool bias in minimum temperature extremes in both RCMs. The shape of the annual cycle of extreme rainfall varies between simulations. There is a wet bias in CRCM5 extreme rainfall on the west coast throughout the year and in winter rainfall elsewhere. In summer both RCMs have precipitation biases in the south-east. These rainfall and temperature biases are likely associated with differences in the physical parameterisation of rainfall. CanRCM4 simulates too little convective rainfall, while over-estimating large-scale rainfall; nevertheless, cloud cover is well simulated. CRCM5 simulates more large-scale rainfall throughout the year on the west coast and in winter in other regions. The spatial extent, intensity and location of atmospheric river (AR) landfall are well reproduced by the RCMs, as is the fraction of winter rainfall from AR days. Spectral nudging improves agreement on landfall latitude between the RCM and the driving model without greatly diminishing the intensity of the rainfall extreme. © 2015, The Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/53701
Appears in Collections: 过去全球变化的重建
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作者单位: Pacific Climate Impacts Consortium, University of Victoria, PO Box 1700 Stn CSC, Victoria, BC, Canada
Recommended Citation:
Whan K.,Zwiers F.. Evaluation of extreme rainfall and temperature over North America in CanRCM4 and CRCM5[J]. Climate Dynamics,2016-01-01,46(2017-11-12)