气候变化领域集成服务门户(CCPortal): Regionalization of seasonal precipitation over the Tibetan plateau and associated large-scale atmospheric systems

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DOI	10.1175/JCLI-D-20-0521.1
	Regionalization of seasonal precipitation over the Tibetan plateau and associated large-scale atmospheric systems
	Lai H.-W.; Chen H.W.; Kukulies J.; Ou T.; Chen D.
发表日期	2021
ISSN	08948755
起始页码	2635
结束页码	2651
卷号	34 期号:7
英文摘要	Precipitation over the Tibetan Plateau (TP) has major societal impacts in South and East Asia, but its spatiotemporal variations are not well understood, mainly because of the sparsely distributed in situ observation sites. With the help of the Global Precipitation Measurement satellite product IMERG and the ERA5 dataset, distinct precipitation seasonality features over the TP were objectively classified using a self-organizing map algorithm fed with 10-day averaged precipitation from 2000 to 2019. The classification reveals three main precipitation regimes with distinct seasonality of precipitation: the winter peak, centered at the western plateau; the early summer peak, found on the eastern plateau; and the late summer peak, mainly located on the southwestern plateau. On a year-to-year basis, the winter peak regime is relatively robust, whereas the early summer and late summer peak regimes tend to shift mainly between the central and northern TP but are robust in the eastern and southwestern TP. A composite analysis shows that the winter peak regime experiences larger amounts of precipitation in winter and early spring when the westerly jet is anomalously strong to the north of the TP. Precipitation variations in the late summer peak regime are associated with intensity changes in the South Asian high and Indian summer monsoon. The precipitation in the early summer peak regime is correlated with the Indian summer monsoon together with anticyclonic circulation over the western North Pacific. The results provide a basic understanding of precipitation seasonality variations over the TP and associated large-scale conditions. © 2021 American Meteorological Society.
英文关键词	Asia; Classification; Large-scale motions; Monsoons; Precipitation; Satellite observations
语种	英语
scopus关键词	Atmospheric thermodynamics; Conformal mapping; Precipitation (meteorology); Self organizing maps; Anticyclonic circulation; Global precipitation measurements; Large scale conditions; Precipitation regimes; Precipitation variation; Seasonal precipitations; Self Organizing Map algorithm; Spatio-temporal variation; Large scale systems; climate modeling; monsoon; precipitation (climatology); regional climate; satellite data; satellite imagery; seasonal variation; seasonality; spatiotemporal analysis; China; Qinghai-Xizang Plateau
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/178671
作者单位	Department of Earth Sciences, University of Gothenburg, Gothenburg, Sweden; Department of Physical Geography and Ecosystem Science, Lund University, Lund, Sweden
推荐引用方式 GB/T 7714	Lai H.-W.,Chen H.W.,Kukulies J.,et al. Regionalization of seasonal precipitation over the Tibetan plateau and associated large-scale atmospheric systems[J],2021,34(7).
APA	Lai H.-W.,Chen H.W.,Kukulies J.,Ou T.,&Chen D..(2021).Regionalization of seasonal precipitation over the Tibetan plateau and associated large-scale atmospheric systems.Journal of Climate,34(7).
MLA	Lai H.-W.,et al."Regionalization of seasonal precipitation over the Tibetan plateau and associated large-scale atmospheric systems".Journal of Climate 34.7(2021).