气候变化领域集成服务门户(CCPortal): Contrasting the Role of Regional and Remote Circulation in Driving Asian Monsoon Biases in MetUM GA7.1

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DOI	10.1029/2020JD034342
	Contrasting the Role of Regional and Remote Circulation in Driving Asian Monsoon Biases in MetUM GA7.1
	Liu Z.; Bollasina M.A.; Wilcox L.J.; Rodríguez J.M.; Regayre L.A.
发表日期	2021
ISSN	2169-897X
卷号	126 期号:14
英文摘要	Monsoon precipitation affects nearly half of the world's population, but monsoon biases are a long-standing problem in climate simulations. We apply dynamical nudging either globally or regionally to demonstrate the role of regional and remote circulation in generating Asian monsoon biases in an atmospheric general circulation model. Monsoon precipitation biases are substantially reduced in response to global nudging but may also be exacerbated over the warm oceanic equatorial areas because of unconstrained sub-grid convection. Regional nudging over Asia appears to be more efficient than nudging outside Asia in reducing seasonal precipitation biases over eastern China and India. This suggests a predominant role of local circulation anomalies in generating monsoon precipitation errors in these regions. An exception is the summer precipitation bias over eastern China, which is more strongly controlled by remote circulation. Besides seasonal mean rainfall, nudging can also improve the simulated interannual and intraseasonal precipitation variability over the subtropics. This results in a better skill in reproducing the observed El Niño teleconnections to India and China and the monsoon onset date. Improved understanding of the origin of Asian monsoon biases and the contribution from regional and remote circulation advances our knowledge of the interplay between the Asian monsoon and large-scale circulation, which can be beneficial to the simulation and interpretation of monsoon projections. © 2021. The Authors.
英文关键词	monsoon biases; nudging; regional circulation; remote circulation
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/237129
作者单位	School of GeoSciences, University of Edinburgh, Edinburgh, United Kingdom; National Centre for Atmospheric Science, Leeds, United Kingdom; Department of Meteorology, University of Reading, Reading, United Kingdom; Met Office, Exeter, United Kingdom; School of Earth and Environment, Institute for Climate and Atmospheric Science, University of Leeds, Leeds, United Kingdom
推荐引用方式 GB/T 7714	Liu Z.,Bollasina M.A.,Wilcox L.J.,et al. Contrasting the Role of Regional and Remote Circulation in Driving Asian Monsoon Biases in MetUM GA7.1[J],2021,126(14).
APA	Liu Z.,Bollasina M.A.,Wilcox L.J.,Rodríguez J.M.,&Regayre L.A..(2021).Contrasting the Role of Regional and Remote Circulation in Driving Asian Monsoon Biases in MetUM GA7.1.Journal of Geophysical Research: Atmospheres,126(14).
MLA	Liu Z.,et al."Contrasting the Role of Regional and Remote Circulation in Driving Asian Monsoon Biases in MetUM GA7.1".Journal of Geophysical Research: Atmospheres 126.14(2021).