气候变化领域集成服务门户(CCPortal): Development and eastward movement mechanisms of the Tibetan Plateau vortices moving off the Tibetan Plateau

CCPortal

DOI	10.1007/s00382-018-4420-z
	Development and eastward movement mechanisms of the Tibetan Plateau vortices moving off the Tibetan Plateau
	Li L.; Zhang R.; Wen M.; Duan J.
发表日期	2019
ISSN	0930-7575
起始页码	4849
结束页码	4859
卷号	52 期号:2020-07-08
英文摘要	Based on the Final operational global analysis data from the Global Forecasting System of the National Centers for Environment Prediction and the radiosonde data, the development and eastward movement mechanisms of 15 Tibetan Plateau vortices (TPVs) after they move off the plateau are investigated. The results show that the convergence to the east of the TPVs at 500 hPa, the divergence associated with the westerly jet stream at 200 hPa, as well as the corresponding ascending motion provide favorable conditions for the development and eastward movement of the TPVs. The spatial structures of the atmospheric apparent heat source (Q 1 ) and the apparent moisture sink (Q 2 ) are studied, showing that the heating centers of Q 1 at 400 hPa mainly sourced from the condensation latent heat are beneficial to the eastward movement of the TPVs, while the horizontal distribution of Q 1 at 500 hPa goes against that. The development and eastward movement mechanisms of the TPVs after they move off the plateau are further discussed through diagnosing the potential vorticity (PV) tendency equation. It is revealed that the horizontal PV flux convergence to the east of the TPVs related to the convergence at 500 hPa plays as the dominant role, exerting positive contribution to the PV tendency. Meanwhile, the heating fields induce feeble PV tendency, indicating more important effect of the dynamic factor. The development and eastward movement mechanisms of the TPVs after they move off the plateau are different from those before the TPVs move off, and the dynamic effect is vital in the former stage while the effect of Q 1 is revealed as the dominant influencing factor in the latter. © 2018, Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	Development and eastward movement mechanisms; Dynamic effect; PV tendency equation; Thermodynamic effect; Tibetan Plateau vortices
语种	英语
scopus关键词	equation; jet stream; potential vorticity; thermodynamics; vortex; westerly; China; Qinghai-Xizang Plateau
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/146385
作者单位	State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, #46, Zhong-Guan-Cun South Avenue, Beijing, 100081, China; Institute of Atmospheric Sciences, Fudan University, Shanghai, China; CAS Center for Excellence in Tibetan Plateau Earth Sciences, Beijing, China; Institute of Atmospheric Physics, Chinese Academy Science, Beijing, China
推荐引用方式 GB/T 7714	Li L.,Zhang R.,Wen M.,et al. Development and eastward movement mechanisms of the Tibetan Plateau vortices moving off the Tibetan Plateau[J],2019,52(2020-07-08).
APA	Li L.,Zhang R.,Wen M.,&Duan J..(2019).Development and eastward movement mechanisms of the Tibetan Plateau vortices moving off the Tibetan Plateau.Climate Dynamics,52(2020-07-08).
MLA	Li L.,et al."Development and eastward movement mechanisms of the Tibetan Plateau vortices moving off the Tibetan Plateau".Climate Dynamics 52.2020-07-08(2019).