DOI: 10.1016/j.atmosres.2018.12.018
Scopus记录号: 2-s2.0-85058977493
论文题名: Effect of Tibetan Plateau heating on summer extreme precipitation in eastern China
作者: Ge J. ; You Q. ; Zhang Y.
刊名: Atmospheric Research
ISSN: 1698095
出版年: 2019
卷: 218 起始页码: 364
结束页码: 371
语种: 英语
英文关键词: Diabatic heating
; Extreme precipitation
; South Asian High
; Tibetan Plateau
Scopus关键词: Moisture
; Precipitation (meteorology)
; Troposphere
; Vorticity
; Diabatic heating
; Extreme precipitation
; Inhomogeneous distribution
; Middle and lower reaches of the yangtze rivers
; Moisture convergence
; Possible mechanisms
; South Asian High
; Tibetan Plateau
; Heating
; diabatic process
; extreme event
; heating
; precipitation (climatology)
; summer
; troposphere
; vorticity
; China
; Pacific Ocean
; Pacific Ocean (West)
; Qinghai-Xizang Plateau
; South China Sea
; Yangtze River
英文摘要: The relationship between the Tibetan Plateau (TP) heating and summer extreme precipitation in eastern China is still unclear. This study shows that when the TP heating is stronger (weaker) than normal, summer extreme precipitation tends to be more (less) over the middle and lower reaches of the Yangtze River valley. The possible mechanisms responsible for the relationship between the TP heating and summer extreme precipitation in eastern China are revealed by investigating the effects of the upper-level South Asian High (SAH). It is found that positive and negative vorticity anomalies accompanied by an ascending motion anomaly occur over the TP regions in the lower and upper troposphere, respectively, when the TP heating is stronger, resulting in the strengthening and eastward extension of the SAH. As a result, an anomalous high-level convergence and downward movement occur over the southeastern portion of the SAH, which then diverge in the mid-lower troposphere, resulting in the formation of an anomalous negative vorticity from South China to the northern part of the South China Sea. Subsequently, the western Pacific subtropical high (WPSH) intensifies and stretches westward. Consequently, the southwestern moisture transport and moisture convergence increase over the middle and lower reaches of the Yangtze River valley, resulting in more extreme precipitation. The eastward extension of the SAH and westward stretching of the WPSH are maintained by the vertically inhomogeneous distribution of precipitation heating. © 2018 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122330
Appears in Collections: 气候变化事实与影响
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作者单位: Key Laboratory of Meteorological Disaster, Ministry of Education (KLME)/Joint International Research Laboratory of Climate and Environment Change (ILCEC)/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters (CIC-FEMD), Nanjing University of Information Science and Technology (NUIST), Nanjing, 210044, China; Department of Atmospheric and Oceanic Sciences & Institute of Atmospheric Sciences, Fudan University, Shanghai, 200438, China; School of Urban and Environmental Sciences, Huaiyin Normal University, Huai'an223300, China
Recommended Citation:
Ge J.,You Q.,Zhang Y.. Effect of Tibetan Plateau heating on summer extreme precipitation in eastern China[J]. Atmospheric Research,2019-01-01,218