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DOI10.1002/joc.5903
Decadal variability in summer precipitation over eastern China and its response to sensible heat over the Tibetan Plateau since the early 2000s
Wang, Huan1,2; Li, Dongliang1,2
2019-03-15
发表期刊INTERNATIONAL JOURNAL OF CLIMATOLOGY
ISSN0899-8418
EISSN1097-0088
出版年2019
卷号39期号:3页码:1604-1617
文章类型Article
语种英语
国家Peoples R China
英文摘要

This study investigates the decadal variations in summer precipitation over eastern China (SPEC) and its response to the decadal change of sensible heat (SH) flux over the Tibetan Plateau (TP). The results show that SPEC experiences a significant decadal change in approximate 2003, demonstrating positive rainfall anomalies over central China and negative anomalies over northeast, north, and south China. Meanwhile, a noticeable increase in SH over the TP occurs in the early 2000s at the decadal time scale. Further analysis reveals that when spring SH over the TP is abnormally strong, there will be a stronger atmospheric heat source and development of deep convection over the TP in the forthcoming summer. The positive thermal forcing induces an abnormal anticyclonic circulation and airflow divergence in the upper layer and cyclonic circulation and airflow convergence in the mid-layer over the TP. And the negative vorticity and positive geopotential height anomalies in the upper layer over the TP and south China leads to the strengthening of the South Asian High (SAH) and the northwestern Pacific subtropical high (NWPSH). As a result, cold and dry air from higher latitudes and warm and humid air from the tropics converge over central China and diverge over north and south China. In addition, there exist a strong ascending motion over central China and an anomalous descending motion over south China due to the positive diabatic heating and horizontal temperature advection anomalies over central China and negative anomalies over south China. On the other hand, the circulation conditions strengthen the East Asian summer monsoon and weaken the South China Sea summer monsoon. Ultimately, more moisture is transported into central China, but less into south China, which give rise to positive and negative rainfall amounts in the corresponding areas, respectively.


英文关键词atmospheric circulation decadal variations since the early 2000s sensible heat over the Tibetan Plateau summer precipitation over eastern China thermal forcing
领域气候变化
收录类别SCI-E
WOS记录号WOS:000461606600031
WOS关键词TROPICAL PACIFIC SSTS ; INTERDECADAL VARIATIONS ; PART I ; MONSOON RAINFALL ; NORTH CHINA ; ASSOCIATION ; TRENDS ; OCEAN ; SHIFT ; CIRCULATION
WOS类目Meteorology & Atmospheric Sciences
WOS研究方向Meteorology & Atmospheric Sciences
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/36997
专题气候变化
作者单位1.Nanjing Univ Informat Sci & Technol, Coll Atmospher Sci, Collaborat Innovat Ctr Forecast & Evaluat Meteoro, Key Lab Meteorol Disaster,Minist Educ, Nanjing 210044, Jiangsu, Peoples R China;
2.NUIST, Int Joint Res Lab Climate & Environm Change ILCEC, Nanjing, Jiangsu, Peoples R China
推荐引用方式
GB/T 7714
Wang, Huan,Li, Dongliang. Decadal variability in summer precipitation over eastern China and its response to sensible heat over the Tibetan Plateau since the early 2000s[J]. INTERNATIONAL JOURNAL OF CLIMATOLOGY,2019,39(3):1604-1617.
APA Wang, Huan,&Li, Dongliang.(2019).Decadal variability in summer precipitation over eastern China and its response to sensible heat over the Tibetan Plateau since the early 2000s.INTERNATIONAL JOURNAL OF CLIMATOLOGY,39(3),1604-1617.
MLA Wang, Huan,et al."Decadal variability in summer precipitation over eastern China and its response to sensible heat over the Tibetan Plateau since the early 2000s".INTERNATIONAL JOURNAL OF CLIMATOLOGY 39.3(2019):1604-1617.
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