气候变化领域集成服务门户(CCPortal): A new classification of large-scale climate regimes around the Tibetan Plateau based on seasonal circulation patterns

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DOI	10.1016/j.accre.2017.01.001
	A new classification of large-scale climate regimes around the Tibetan Plateau based on seasonal circulation patterns
	Dai X.-G.; Wang P.
发表日期	2017
ISSN	1674-9352
卷号	8 期号:1
英文摘要	This study aims to develop a large-scale climate classification for investigating the characteristics of the climate regimes around the Tibetan Plateau based on seasonal precipitation, moisture transport and moisture divergence using in situ observations and ERA40 reanalysis data. The results indicate that the climate can be attributed to four regimes around the Plateau. They situate in East Asia, South Asia, Central Asia and the semi-arid zone in northern Central Asia throughout the dryland of northwestern China, in addition to the Köppen climate classification. There are different collocations of seasonal temperature and precipitation: 1) in phase for the East and South Asia monsoon regimes, 2) anti-phase for the Central Asia regime, 3) out-of-phase for the westerly regime. The seasonal precipitation concentrations are coupled with moisture divergence, i.e., moisture convergence coincides with the Asian monsoon zone and divergence appears over the Mediterranean-like arid climate region and westerly controlled area in the warm season, while it reverses course in the cold season. In addition, moisture divergence is associated with meridional moisture transport. The northward/southward moisture transport corresponds to moisture convergence/divergence, indicating that the wet and dry seasons are, to a great extent, dominated by meridional moisture transport in these regions. The climate mean southward transport results in the dry-cold season of the Asian monsoon zone and the dry-warm season, leading to desertification or land degradation in Central Asia and the westerly regime zone. The mean-wind moisture transport (MMT) is the major contributor to total moisture transport, while persistent northward transient eddy moisture transport (TEMT) plays a key role in dry season precipitation, especially in the Asian monsoon zone. The persistent TEMT divergence is an additional mechanism of the out-of-phase collocation in the westerly regime zone. In addition, the climate-mean MMT and TEMT are associated with the atmospheric stationary wave and storm track, which results from the uplift of orography and land-sea thermal contrast. Therefore, the paleoclimate changes in mid-latitude arid-semi-arid regions are linked to the different phases of uplift of mountains and plate motion tied to the evolution of the Mediterranean. © 2017 National Climate Center (China Meteorological Administration)
英文关键词	Central Asia dryland; Large-scale climate classification; Mediterranean climate; Moisture transport; Tibetan Plateau; Westerly
语种	英语
来源期刊	Advances in Climate Change Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/89208
作者单位	RCE-TEA, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China; Institute of Air Condition, Chinese Academy of Meteorological Sciences, Beijing, 100081, China
推荐引用方式 GB/T 7714	Dai X.-G.,Wang P.. A new classification of large-scale climate regimes around the Tibetan Plateau based on seasonal circulation patterns[J],2017,8(1).
APA	Dai X.-G.,&Wang P..(2017).A new classification of large-scale climate regimes around the Tibetan Plateau based on seasonal circulation patterns.Advances in Climate Change Research,8(1).
MLA	Dai X.-G.,et al."A new classification of large-scale climate regimes around the Tibetan Plateau based on seasonal circulation patterns".Advances in Climate Change Research 8.1(2017).