干旱区生态环境知识资源中心(Arid): Impact of Dust-Cloud-Radiation-Precipitation Dynamical Feedback on Subseasonal-to-Seasonal Variability of the Asian Summer Monsoon in Global Variable-Resolution Simulations With MPAS-CAM5

Arid

DOI	10.3389/feart.2020.00226
	Impact of Dust-Cloud-Radiation-Precipitation Dynamical Feedback on Subseasonal-to-Seasonal Variability of the Asian Summer Monsoon in Global Variable-Resolution Simulations With MPAS-CAM5
	Lau, William K. M.1; Kim, Kyu-Myong 2; Zhao, Chun 3,4; Leung, L. Ruby 5; Park, Sang-Hun 6
通讯作者	Lau, William K. M.
来源期刊	FRONTIERS IN EARTH SCIENCE
EISSN	2296-6463
出版年	2020
卷号	8
英文摘要	In this study, we investigate the effects of increased dust emission from the Middle East deserts on subseasonal-to-seasonal (S2S) variability of the Asian summer monsoon (ASM). Numerical experiments are performed using the Model for Prediction Across Scales (MPAS) coupled with the Community Atmosphere Model (CAM5) physics, with regional refinement at 30 km grid resolution over South Asia and the surrounding regions. Result shows that increased dust emission and transport from the Middle East/West Asia region induces a strong dust-cloud-radiation-precipitation-circulation feedback, resulting in a colder surface over the desert regions and the western Tibetan Plateau, but warmer and moister troposphere with enhanced cloudiness and precipitation over the Pakistan/Northwest India (PNWI) region. The latter changes are amplified by the dust aerosol induced Elevated Heat Pump (EHP) mechanism along the West Himalayas/Iranian Plateau foothill regions, most pronounced during May-June. During July-August, cloud radiation feedback further enhances the warming of the upper troposphere, and cooling of the land surface over the PNWI and adjacent regions over West Asia. The upper tropospheric heating and increased precipitation over PNWI spur a large-scale anomalous Rossby wavetrain and a northward displacement of the subtropical jetstream, manifesting in a contraction of the South Asian High and westward shift of the Western Pacific Subtropical High. As a result, the entire ASM precipitation-cloud system is displaced westward. Precipitation and cloudiness are intensified over northwest and western India and west Asia, but suppressed over southern and central East Asia. Analyses of the S2S variability of the upper level vorticity balance suggests that heating by Middle East dust plays an important role in exciting, and anchoring a teleconnection pattern through interactions among dust-cloud radiation, precipitation heating over the PNWI, the development of an upper level Rossby wavetrain, and the northward shift of the boreal summer jetstream over Eurasia.
英文关键词	Asian summer monsoon Middle East dust Tibetan Plateau aerosol-cloud radiative feedback elevated heat pump Rossby wavetrain jetstream displacement subseasonal-to-seasonal variability
类型	Article
语种	英语
国家	USA ; Peoples R China ; South Korea
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000548401700001
WOS关键词	COMMUNITY ATMOSPHERE MODEL ; INTERANNUAL VARIABILITY ; TELECONNECTION PATTERNS ; ANTHROPOGENIC AEROSOLS ; MIDDLE-EAST ; CLIMATE ; RAINFALL ; PARAMETERIZATION ; CIRCULATION ; REPRESENTATION
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/319536
作者单位	1.Univ Maryland, Earth Syst Sci Interdisciplinary Ctr, College Pk, MD 20742 USA; 2.NASA, Lab Atmospher Sci, Goddard Space Flight Ctr, Greenbelt, MD USA; 3.Univ Sci & Technol China, Sch Earth & Space Sci, Hefei, Peoples R China; 4.Univ Sci & Technol China, CAS Ctr Excellence Comparat Planetol, Hefei, Peoples R China; 5.Pacific Northwest Natl Lab, Richland, WA 99352 USA; 6.Yonsei Univ, Dept Atmospher Sci, Seoul, South Korea
推荐引用方式 GB/T 7714	Lau, William K. M.,Kim, Kyu-Myong,Zhao, Chun,et al. Impact of Dust-Cloud-Radiation-Precipitation Dynamical Feedback on Subseasonal-to-Seasonal Variability of the Asian Summer Monsoon in Global Variable-Resolution Simulations With MPAS-CAM5[J],2020,8.
APA	Lau, William K. M.,Kim, Kyu-Myong,Zhao, Chun,Leung, L. Ruby,&Park, Sang-Hun.(2020).Impact of Dust-Cloud-Radiation-Precipitation Dynamical Feedback on Subseasonal-to-Seasonal Variability of the Asian Summer Monsoon in Global Variable-Resolution Simulations With MPAS-CAM5.FRONTIERS IN EARTH SCIENCE,8.
MLA	Lau, William K. M.,et al."Impact of Dust-Cloud-Radiation-Precipitation Dynamical Feedback on Subseasonal-to-Seasonal Variability of the Asian Summer Monsoon in Global Variable-Resolution Simulations With MPAS-CAM5".FRONTIERS IN EARTH SCIENCE 8(2020).