气候变化领域集成服务门户(CCPortal): Atmospheric Meridional Circulation Between South Asia and Tibetan Plateau Caused by the Change of Planetary Boundary Layer Depth

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DOI	10.1029/2023JD039506
	Atmospheric Meridional Circulation Between South Asia and Tibetan Plateau Caused by the Change of Planetary Boundary Layer Depth
	Zhao, Ping; Li, Yilin; Jia, Chunhui; Che, Junhui
发表日期	2023
ISSN	2169-897X
EISSN	2169-8996
卷号	128 期号:21
英文摘要	Planetary boundary layer (PBL) influences the vertical exchanges of momentum, heat, water vapor, atmospheric pollutants, and the efficacy of climate forcing between land surface and atmosphere. Over the western Tibetan Plateau (TP), PBL can stretch into the middle-upper troposphere. In this study, we investigate an effect of the PBL depth change on atmospheric circulations between South Asia and the TP through the formula derivation, the observation, and the model data set. The derivation first gives the PBL depth-generalized pressure equation. It reveals an effect of PBL depth on the pressure change with time. The data analysis further shows that an increase of PBL depth in the western TP can cause the subsequent development of the PBL low (high) pressure anomalies in the northwestern TP (northern South Asia) and the upper-tropospheric high (low) pressure anomalies over the TP (South Asia), with an anticlockwise meridional-vertical circulation (MVC) anomaly from South Asia to the TP. In this process, the peak of PBL depth may be ahead of that of the low-pressure occurrence, which may cause the MVC development to lag behind surface heating. The anticlockwise MVC anomaly strengthens the transport of water vapor from the lower troposphere over South Asia to the TP PBL, producing convective precipitation in the TP.
关键词	planetary boundary layer depth Tibetan Plateau atmospheric circulation
英文关键词	MONSOON; MECHANISM
WOS研究方向	Meteorology & Atmospheric Sciences
WOS记录号	WOS:001093848700001
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/283750
作者单位	China Meteorological Administration; Chinese Academy of Meteorological Sciences (CAMS); Fudan University; Fudan University; Nanjing University of Information Science & Technology
推荐引用方式 GB/T 7714	Zhao, Ping,Li, Yilin,Jia, Chunhui,et al. Atmospheric Meridional Circulation Between South Asia and Tibetan Plateau Caused by the Change of Planetary Boundary Layer Depth[J],2023,128(21).
APA	Zhao, Ping,Li, Yilin,Jia, Chunhui,&Che, Junhui.(2023).Atmospheric Meridional Circulation Between South Asia and Tibetan Plateau Caused by the Change of Planetary Boundary Layer Depth.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,128(21).
MLA	Zhao, Ping,et al."Atmospheric Meridional Circulation Between South Asia and Tibetan Plateau Caused by the Change of Planetary Boundary Layer Depth".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 128.21(2023).