作者
Can Zhao, Zhihong Jiang, Xiaojuan Sun, Wei Li, Laurent Li
发表日期
2019/7/3
期刊
International Journal of Climatology
简介
Abstract 19 This study presents a comprehensive and quantitative evaluation of the mean state of 20 summer atmospheric circulation over East Asia. Attention is paid to the South Asian high 21 (SAH), western North Pacific subtropical high (WNPSH) and Indian low (IL) at the upper, 22 middle and lower troposphere, respectively. A total of 31 state‐of‐the‐art climate models 23 from phase 5 of the Coupled Model Intercomparison Project (CMIP5) are used as examples 24 for the analysis. Most models can basically simulate the three closed‐circulation systems 25 (CCSs), although there is a certain inter‐model spread and an underestimation of their 26 intensity. In terms of geographic location, models demonstrated the best performance for 27 SAH and the poorest performance for WNPSH. The latter shows a generally south‐28 westward shift compared to the National Centers for Environmental Prediction (NCEP) 29 reanalysis. Five atmospheric fields (zonal and meridional wind at 850 hPa, geopotential 30 height at 500 and 100 hPa and sea level pressure) are inspected and generally well 31 reproduced in models, with Taylor‐S indices all larger than 0.84 for 90% of the models. 32 The best performance is for the geopotential height of 500 hPa with an average Taylor‐S 33 index of 0.98. Models’ skill in simulating the sea level pressure is the lowest. However, a 34 significant positive correlation with models' resolution is observed. Almost all models 35 underestimate the 100 hPa geopotential height over East Asia, mainly due to the common 36 cold bias in the troposphere. As a whole, CCSM4, CNRM‐CM5, CESM1‐CAM5 and 37 NorESM1‐M are …
引用总数
2020202120222023202424575
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