DOI: 10.1175/JCLI-D-16-0242.1
Scopus记录号: 2-s2.0-85001022135
论文题名: Northern Hemisphere atmospheric blocking representation in global climate models: Twenty years of improvements?
作者: Davini P. ; D'Andrea F.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2016
卷: 29, 期: 24 起始页码: 8823
结束页码: 8840
语种: 英语
Scopus关键词: Atmospheric temperature
; Earth atmosphere
; Numerical models
; Oceanography
; Surface waters
; Systematic errors
; Weather forecasting
; Atmospheric circulation
; Blocking
; Model comparison
; Planetary Waves
; Wavebreaking
; Climate models
英文摘要: The correct simulation of midlatitude atmospheric blocking has always been a main concern since the earliest days of numerical modeling of Earth's atmosphere. To this day blocking represents a considerable source of error for general circulation models from both a numerical weather prediction and a climate perspective. In the present work, 20 years of global climate model (GCM) developments are analyzed from the special point of view of Northern Hemisphere atmospheric blocking simulation. Making use of a series of equivalent metrics, three generations of GCMs are compared. This encompasses a total of 95 climate models, many of which are different-successive-versions of the same model. Results from model intercomparison projects AMIP1 (1992), CMIP3 (2007), and CMIP5 (2012) are taken into consideration. Although large improvements are seen over the Pacific Ocean, only minor advancements have been achieved over the Euro-Atlantic sector. Some of the most recent GCMs still exhibit the same negative bias as 20 years ago in this region, associated with large geopotential height systematic errors. Some individual models, nevertheless, have improved and do show good performances in both sectors. Negligible differences emerge among ocean-coupled or atmosphere-only simulations, suggesting weak relevance of sea surface temperature biases. Conversely, increased horizontal resolution seems to be able to alleviate the Euro-Atlantic blocking bias. © 2016 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50344
Appears in Collections: 气候变化事实与影响
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作者单位: Laboratoire de Météorologie Dynamique/IPSL, Ecole Normale Supérieure, PSL Research University, CNRS, Paris, France
Recommended Citation:
Davini P.,D'Andrea F.. Northern Hemisphere atmospheric blocking representation in global climate models: Twenty years of improvements?[J]. Journal of Climate,2016-01-01,29(24)