气候变化领域集成服务门户(CCPortal): Monsoon low pressure system–like variability in an idealized moist model

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DOI	10.1175/JCLI-D-19-0289.1
	Monsoon low pressure system–like variability in an idealized moist model
	Clark S.K.; Ming Y.; Adames Á.F.
发表日期	2020
ISSN	0894-8755
起始页码	2051
结束页码	2074
卷号	33 期号:6
英文摘要	In this paper, it is shown that westward-propagating monsoon low pressure system–like disturbances in the South Asian monsoon region can be simulated in an idealized moist general circulation model through the addition of a simplified parameterization of land. Land is parameterized as having one-tenth the heat capacity of the surrounding slab ocean, with evaporation limited by a bucket hydrology model. In this model, the prominent topography of the Tibetan Plateau does not appear to be necessary for these storm systems to form or propagate; therefore, focus is placed on the simulation with land but no topography. The properties of the simulated storms are elucidated using regression analysis and compared to results from composites of storms from comprehensive GCMs in prior literature and reanalysis. The storms share a similar vertical profile in anomalous Ertel potential vorticity to those in reanalysis. Propagation, however, does not seem to be strongly dictated by beta drift. Rather, it seems to be more closely consistent with linear moisture vortex instability theory, with the exception of the importance of the vertical advection term in the Ertel potential vorticity budget toward the growth and maintenance of disturbances. The results presented here suggest that a simplified GCM configuration might be able to be used to gain a clearer understanding of the sensitivity of monsoon low pressure systems to changes in the mean state climate. © 2020 American Meteorological Society.
英文关键词	Budget control; Regression analysis; Specific heat; Storms; Topography; Vortex flow; Vorticity; Ertel potential vorticity; General circulation model; Hydrology modeling; Low pressure systems; Simulated storms; Vertical advection; Vertical profile; Vortex instability; Atmospheric thermodynamics; atmospheric dynamics; hydrological modeling; low pressure system; monsoon; plateau; potential vorticity; spatial variation; topographic effect; China; Qinghai-Xizang Plateau; 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/171411
作者单位	Program in Atmospheric and Oceanic Sciences, Princeton University, Princeton, NJ, United States; NOAA/Geophysical Fluid Dynamics Laboratory, Princeton, NJ, United States; Department of Climate and Space Science and Engineering, University of Michigan, Ann Arbor, MI, United States
推荐引用方式 GB/T 7714	Clark S.K.,Ming Y.,Adames Á.F.. Monsoon low pressure system–like variability in an idealized moist model[J],2020,33(6).
APA	Clark S.K.,Ming Y.,&Adames Á.F..(2020).Monsoon low pressure system–like variability in an idealized moist model.Journal of Climate,33(6).
MLA	Clark S.K.,et al."Monsoon low pressure system–like variability in an idealized moist model".Journal of Climate 33.6(2020).