DOI: 10.1175/JCLI-D-14-00337.1
Scopus记录号: 2-s2.0-84922962824
论文题名: Extreme precipitation in an atmosphere general circulation model: Impact of horizontal and vertical model resolutions
作者: Volosciuk C. ; Maraun D. ; Semenov V.A. ; Park W.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2015
卷: 28, 期: 3 起始页码: 1184
结束页码: 1205
语种: 英语
Scopus关键词: Atmospheric temperature
; Earth atmosphere
; Oceanography
; Precipitation (meteorology)
; Rain
; Sea ice
; Surface waters
; Atmosphere general circulation models
; Atmospheric general circulation models
; Extreme precipitation
; Generalized extreme value distribution
; Horizontal resolution
; Large scale weather system
; Sea ice concentration
; Sea surface temperature (SST)
; Tropics
; atmospheric general circulation model
; extreme event
; Northern Hemisphere
; precipitation intensity
; sea ice
; sea surface temperature
英文摘要: To investigate the influence of atmospheric model resolution on the representation of daily precipitation extremes, ensemble simulations with the atmospheric general circulation model ECHAM5 at different horizontal (from T213 to T31 spectral truncation) and vertical (from L31 to L19) resolutions and forced with observed sea surface temperatures and sea ice concentrations have been carried out for January 1982-September 2010.All results have been comparedwith the highest resolution,which has been validated against observations. Resolution affects both the representation of physical processes and the averaging of precipitation across grid boxes. The latter, in particular, smooths out localized extreme events. These effects have been disentangled by averaging precipitation simulated at the highest resolution to the corresponding coarser grid. Extremes are represented by seasonal maxima, modeled by the generalized extreme value distribution. Effects of averaging and representation of physical processes vary with region and season. In the tropical summer hemisphere, extreme precipitation is reduced by up to 30% due to the averaging effect, and a further 65%owing to a coarser representation of physical processes. Toward middle to high latitudes, the latter effect reduces to 20%; in the winter hemisphere it vanishes toward the poles.Astrong drop is found between T106 and T63 in the convection-dominated tropics. At the lowest resolution, Northern Hemisphere winter precipitation extremes, mainly caused by large-scale weather systems, are in general represented reasonably well. Coarser vertical resolution causes an equatorward shift of maximum extreme precipitation in the tropics. The impact of vertical resolution on mean precipitation is less pronounced; for horizontal resolution it is negligible. © 2015 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50725
Appears in Collections: 气候变化事实与影响
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作者单位: GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany; A. M. Obukhov Institute of Atmospheric Physics, P. P. Shirshov Institute of Oceanology, and Institute of Geography, Russian Academy of Sciences, Moscow, Russian Federation
Recommended Citation:
Volosciuk C.,Maraun D.,Semenov V.A.,et al. Extreme precipitation in an atmosphere general circulation model: Impact of horizontal and vertical model resolutions[J]. Journal of Climate,2015-01-01,28(3)