DOI: 10.1175/JCLI-D-13-00435.1
Scopus记录号: 2-s2.0-84902113314
论文题名: Madden-Julian oscillation and the winter rainfall in Taiwan
作者: Hung C.-W. ; Lin H.-J. ; Hsu H.-H.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2014
卷: 27, 期: 12 起始页码: 4521
结束页码: 4530
语种: 英语
Scopus关键词: Atmospheric pressure
; Atmospheric thermodynamics
; Climate change
; Moisture
; Atmospheric response
; Diabatic heating
; Intraseasonal variability
; Madden-Julian oscillation
; Maritime Continent
; South China sea
; Western Pacific Warm Pool
; Winter rainfall
; Rain
; anticyclone
; atmospheric moisture
; diabatic process
; Madden-Julian oscillation
; monsoon
; rainfall
; seasonal variation
; wave propagation
; winter
; Arabian Sea
; Greater Sunda Islands
; Indian Ocean
; Java
; Pacific Ocean
; South China Sea
; Sumatra
; Sunda Isles
; Taiwan
英文摘要: This study discusses major impacts of the Madden-Julian oscillation (MJO) on the winter (November- April) rainfall in Taiwan. The results show that Taiwan has more rainfall in MJO phases 3 and 4 (MJO convectively active phase in the Indian Ocean and the western part of the Maritime Continent), and less rainfall in phases 7 and 8 (the western Pacific warm pool area). Mechanisms associated with the MJO are suggested as follows. 1) The tropics to midlatitude wave train: when the MJO moves to the middle Indian Ocean, a Matsuno-Gill-type pattern is induced. The feature of this tropical atmospheric response to the MJO diabatic heating is a pair of upper-level anomalous anticyclones symmetric about the equator to the west of the heating. The northern anomalous anticyclone over the Arabian Sea and northern India induces a northeastward-propagating wave train to the midlatitudes. The wave pattern consists of a cyclonic anomaly centered at East Asia that enhances the winter rainfall in Taiwan. 2) Increase of moisture supply from the South China Sea: when the MJO convection approaches Sumatra and Java of the Maritime Continent, the eastward penetration of equatorial convection enhances a low-level southerly flow that transports the moisture northward to Taiwan and southern China. As a consequence, with the increase of moisture supply from the south, more winter monsoon rainfall is observed in Taiwan. © 2014 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51450
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Geography, National Taiwan Normal University, 162 HePing East Rd., Section 1, Taipei 10610, Taiwan; Research Center for Environmental Change, Academia Sinica, Taipei, Taiwan
Recommended Citation:
Hung C.-W.,Lin H.-J.,Hsu H.-H.. Madden-Julian oscillation and the winter rainfall in Taiwan[J]. Journal of Climate,2014-01-01,27(12)