East Asian summer monsoon precipitation response to variations in upstream westerly wind SCIE SCOPUS

Cited 0 time in WEB OF SCIENCE Cited 0 time in Scopus
Title
East Asian summer monsoon precipitation response to variations in upstream westerly wind
Author(s)
Son, Jun Hyeok; Seo, Kyong-Hwan
KIOST Author(s)
Son, Jun Hyeok(손준혁)
Alternative Author(s)
손준혁
Publication Year
2022-07
Abstract
From spring to summer, the East Asian summer monsoon (EASM) rainband migrates northwestward. During summer, East Asian countries experience extensive precipitation due to the EASM rainband, but the springtime monsoon rainband lies over the Pacific. The seasonal evolution of the EASM rainband is influenced by the mechanical effect of the Tibetan Plateau, and seasonal changes in the westerly wind speeds impinging on the Tibetan Plateau are a key driver of this process. In this study, using interannual variability of the upstream zonal wind speed, the dynamical mechanism for the interannual variations of the EASM precipitation is revealed based on the topographically forced stationary Rossby wave theory. The dynamical mechanism regulating interannual variability in the EASM rainband is essentially the same mechanism that drives the seasonal evolution of the climatological EASM rainband. If the westerly winds impinging on the Tibetan Plateau are stronger (weaker) than average, then the EASM rainband shifts eastward (westward). Large variations in the upstream westerly wind during May induced considerable interannual variation in the zonal location of the rainband (up to a 20°–30° shift). The westerly wind speed exhibited less variations in June and July, resulting in a smaller zonal shift of approximately 10°.
ISSN
0930-7575
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/42340
DOI
10.1007/s00382-021-06117-9
Bibliographic Citation
Climate Dynamics, v.59, no.1-2, pp.77 - 84, 2022
Publisher
Springer Verlag
Keywords
East Asian summer monsoon; Rainband; Precipitation; Interannual variability; Tibetan Plateau
Type
Article
Language
English
Document Type
Article; Early Access
Publisher
Springer Verlag
Files in This Item:
There are no files associated with this item.

qrcode

Items in ScienceWatch@KIOST are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse