DOI: 10.1002/joc.5903
Scopus记录号: 2-s2.0-85056622787
论文题名: Decadal variability in summer precipitation over eastern China and its response to sensible heat over the Tibetan Plateau since the early 2000s
作者: Wang H. ; Li D.
刊名: International Journal of Climatology
ISSN: 8998418
出版年: 2019
卷: 39, 期: 3 起始页码: 1604
结束页码: 1617
语种: 英语
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
Scopus关键词: Atmospheric thermodynamics
; Tropics
; Atmospheric circulation
; Decadal variations
; Eastern China
; Thermal forcing
; Tibetan Plateau
; Rain
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. © 2018 Royal Meteorological Society Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/116530
Appears in Collections: 全球变化的国际研究计划
There are no files associated with this item.
作者单位: College of Atmospheric Science, Nanjing University of Information Science & Technology, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Key Laboratory of Meteorological Disaster, Ministry of Education, Nanjing, China; International Joint Research Laboratory on Climate and Environment Change (ILCEC), NUIST, Nanjing, China
Recommended Citation:
Wang H.,Li D.. 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,2019-01-01,39(3)