气候变化领域集成服务门户(CCPortal): Weakening summer westerly circulation actuates greening of the Tibetan Plateau

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DOI	10.1016/j.gloplacha.2022.104027
	Weakening summer westerly circulation actuates greening of the Tibetan Plateau
	Wang, Zhipeng; Niu, Ben; He, Yongtao; Zhang, Jing; Wu, Jianshuang; Wang, Xiangtao; Zhang, Yangjian; Zhang, Xianzhou
发表日期	2023
ISSN	0921-8181
EISSN	1872-6364
卷号	221
英文摘要	Greening of the Earth is among the world's most important ecological changes in recent decades, but its effects and triggers are multifaceted and varied across the globe. Climate change is the primary driver for greening of the Tibetan Plateau (TP), where vegetation is of great significance for resident survival, carbon sequestration and climate feedbacks. However, the spatial variability of greening and its drivers are not well-understood on the TP. Here, we compiled multi-source vegetation indices, climate and atmospheric data to investigate the greenness spatiotemporal variability and its linkage with large-scale climate oscillations. We found that greening domi-nated the TP during 1980s-2010s and positive trends in satellite-based vegetation indices account for >70% of the TP. Specifically, the arid and semi-arid TP experienced a significant and higher greening rate due to the remarkable increase in precipitation. We further clarified the domains of the South Asian monsoon (SAMI1 and SAMI2), the westerly wind (WI) and the plateau monsoon (TPMI) on the TP, and realized that the wetness in-crease in the arid and semi-arid was correlated with a weakening WI. Detecting the linkage between WI with large-scale climate oscillations, we suggested that the decadal weakening WI was induced by a warmer North Atlantic SST (positive AMO phase), which triggered wave train anomalies and regulated zonal and meridional vapor transport across Eurasia. Generally, during the weak/negative WI phase, anticyclone anomalies centered over Mongolia may strongly reduce vapor output across the east boundaries, while cyclone anomalies centered over the northwest outside the TP likely enhance meridional vapor transport into the western TP from the south ocean. Eventually, precipitation over the arid and semi-arid TP increased significantly in the past four decades, that stimulated plant growth and greening pattern on the TP. Our results established the linkage among climate oscillations, regional climate alteration and vegetation greening, providing a more thorough understanding in terrestrial greening.
关键词	Greening Climate change Westerly wind South Asia monsoon Teleconnection Tibetan Plateau
英文关键词	SILK ROAD; TELECONNECTION PATTERN; MOISTURE SOURCE; CLIMATE-CHANGE; PRECIPITATION; TEMPERATURE; IMPACTS; MONSOON; JET; VARIABILITY
WOS研究方向	Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号	WOS:000975315000001
来源期刊	GLOBAL AND PLANETARY CHANGE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283748
作者单位	Chinese Academy of Sciences; Institute of Geographic Sciences & Natural Resources Research, CAS; Hebei University of Engineering; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; Beijing Normal University; Chinese Academy of Agricultural Sciences; Institute of Environment & Sustainable Development in Agriculture, CAAS; Tibet Agriculture & Animal Husbandry University
推荐引用方式 GB/T 7714	Wang, Zhipeng,Niu, Ben,He, Yongtao,et al. Weakening summer westerly circulation actuates greening of the Tibetan Plateau[J],2023,221.
APA	Wang, Zhipeng.,Niu, Ben.,He, Yongtao.,Zhang, Jing.,Wu, Jianshuang.,...&Zhang, Xianzhou.(2023).Weakening summer westerly circulation actuates greening of the Tibetan Plateau.GLOBAL AND PLANETARY CHANGE,221.
MLA	Wang, Zhipeng,et al."Weakening summer westerly circulation actuates greening of the Tibetan Plateau".GLOBAL AND PLANETARY CHANGE 221(2023).