气候变化领域集成服务门户(CCPortal): The South Asian monsoon circulation in moist isentropic coordinates

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DOI	10.1175/JCLI-D-19-0637.1
	The South Asian monsoon circulation in moist isentropic coordinates
	Sabin T.P.; Pauluis O.M.
发表日期	2020
ISSN	0894-8755
起始页码	5253
结束页码	5270
卷号	33 期号:12
英文摘要	The atmospheric circulation during the South Asian summer monsoon season is analyzed in moist isentropic coordinates. The horizontal mass transport is sorted in terms of its equivalent potential temperature and is separated into the upper- and lower-tropospheric contributions. This technique makes it possible to trace the transport of air parcels over long distances, identify regions of convective motion in the tropics, and assess the impacts of diabatic processes. The goal here is to assess the thermodynamic characteristics of the atmospheric overturning associated with the South Asian monsoon and to connect this thermodynamic structure to horizontal transport. The monsoon is associated with a low-level inflow of warm and moist air, compensated by an upper-tropospheric outflow at high potential temperature. The South Asian monsoon differs, however, from other monsoonal systems in two important ways. First, the ascending air exhibits an unusually high equivalent potential temperature, which results in global lifting of the tropopause during the boreal summer. Second, on a seasonal basis the main monsoon regions appear to be shielded from dry air intrusion from the extratropical regions. © 2020 American Meteorological Society.
英文关键词	Atmospheric movements; Atmospheric structure; Temperature; Troposphere; Asian summer monsoons; Atmospheric circulation; Convective motions; Dry-air intrusions; Horizontal transport; Potential temperature; Thermodynamic characteristics; Thermodynamic structures; Atmospheric thermodynamics; atmospheric circulation; extratropical environment; monsoon; regional climate; summer; temperature effect; thermodynamics; South Asia
语种	英语
来源期刊	Journal of Climate
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/171296
作者单位	Centre for Climate Change Research, Indian Institute of Tropical Meteorology, Pune, India, and Center for Prototype Climate Modeling, New York University, Abu Dhabi, United Arab Emirates; Center for Atmosphere Ocean Science, Courant Institute of Mathematical Sciences, New York University, New York, New York, and Center for Prototype Climate Modeling, New York University, Abu Dhabi, United Arab Emirates
推荐引用方式 GB/T 7714	Sabin T.P.,Pauluis O.M.. The South Asian monsoon circulation in moist isentropic coordinates[J],2020,33(12).
APA	Sabin T.P.,&Pauluis O.M..(2020).The South Asian monsoon circulation in moist isentropic coordinates.Journal of Climate,33(12).
MLA	Sabin T.P.,et al."The South Asian monsoon circulation in moist isentropic coordinates".Journal of Climate 33.12(2020).