DOI: 10.1007/s00382-012-1396-y
Scopus记录号: 2-s2.0-84871853374
论文题名: Evaluation of the antarctic surface wind climate from ERA reanalyses and RACMO2/ANT simulations based on automatic weather stations
作者: Sanz Rodrigo J. ; Buchlin J.-M. ; van Beeck J. ; Lenaerts J.T.M. ; van den Broeke M.R.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2013
卷: 40, 期: 2017-01-02 起始页码: 353
结束页码: 376
语种: 英语
英文关键词: Antarctica
; ERA-40
; ERA-Interim
; Katabatic
; RACMO2/ANT
; Weibull
英文摘要: A continental scale evaluation of Antarctic surface winds is presented from global ERA-40 and ERA-Interim reanalyses and RACMO2/ANT regional climate model at 55 and 27 km horizontal resolution, based on a comparison with observational data from 115 automatic weather stations (AWS). The Antarctic surface wind climate can be classified based on the Weibull shape factor kw. Very high values (kw > 3) are found in the interior plateaus, typical of very uniform katabatic-dominated winds with high directional constancy. In the coast and all over the Antarctic Peninsula the shape factors are similar to the ones found in mid-latitudes (kw < 3) typical of synoptically dominated wind climates. The Weibull shape parameter is systematically overpredicted by ERA reanalyses. This is partly corrected by RACMO2/ANT simulations which introduce more wind speed variability in complex terrain areas. A significant improvement is observed in the performance of ERA-Interim over ERA-40, with an overall decrease of 14 % in normalized mean absolute error. In escarpment and coastal areas, where the terrain gets rugged and katabatic winds are further intensified in confluence zones, ERA-Interim bias can be as high as 10 m s-1. These large deviations are partly corrected by the regional climate model. Given that RACMO2/ANT is an independent simulation of the near-surface wind speed climate, as it is not driven by observations, it compares very well to the ERA-Interim and AWS-115 datasets. © 2012 Springer-Verlag. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54973
Appears in Collections: 过去全球变化的重建
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作者单位: von Karman Institute for Fluid Dynamics (VKI), Sint-Genesius-Rode, Belgium; Institute for Marine and Atmospheric Research (IMAU), Utrecht University, Utrecht, Netherlands; National Renewable Energy Centre of Spain (CENER), Sarriguren, Spain
Recommended Citation:
Sanz Rodrigo J.,Buchlin J.-M.,van Beeck J.,et al. Evaluation of the antarctic surface wind climate from ERA reanalyses and RACMO2/ANT simulations based on automatic weather stations[J]. Climate Dynamics,2013-01-01,40(2017-01-02)