DOI: 10.1002/jgrd.50779
论文题名: Decadal changes of Meiyu rainfall around 1991 and its relationship with two types of ENSO
作者: Zhu J. ; Huang D.-Q. ; Zhang Y.-C. ; Huang A.-N. ; Kuang X.-Y. ; Huang Y.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 17 起始页码: 9766
结束页码: 9777
语种: 英语
英文关键词: conventional ENSO
; decadal climate shift
; ENSO Modoki
; Meiyu
Scopus关键词: Atmospheric pressure
; Oceanography
; Production platforms
; Rain
; Storms
; Sun
; Water vapor
; Climate shifts
; conventional ENSO
; Eastern equatorial Pacific
; ENSO Modoki
; Meiyu
; Possible mechanisms
; Sea surface temperature (SST)
; Western North Pacific
; Climatology
; anticyclone
; decadal variation
; El Nino-Southern Oscillation
; rainfall
; sea surface temperature
; China
; Huai River
; Pacific Ocean
; Pacific Ocean (North)
; Yangtze Valley
英文摘要: This study investigates Meiyu (June-July) rainfall from 1980 to 2000 over Yangtze-Huaihe River valley (YHRV) and reveals a decadal change around 1991 with a seesaw-like distribution. This decadal change is closely associated with negative phase of preceding winter El Niño-Southern Oscillation (ENSO) Modoki (EM) in the pre-1991 epoch and positive phase of conventional ENSO (CE) in the post-1991 epoch. In response to negative EM (pre-1991 epoch), the source of water vapor is western North Pacific, associated with the eastward retreat of western Pacific subtropical high (WPSH) and the northward shift of East Asian westerly jet (EAWJ). On the other hand, in response to positive CE (post-1991 epoch), water vapor generally comes from the South China Sea, associated with the enhancement and westward advance of the WPSH and southward shift of the EAWJ. Two possible mechanisms are proposed to explain the relationship between preceding winter sea surface temperature (SST) and Meiyu rainfall over YHRV in the two epochs. In the pre-1991 epoch, due to enhanced precipitation, solar radiation decreases, resulting in SST cooling over western North Pacific in Meiyu period. An anomalous anticyclone associated with the SST cooling suppresses precipitation over northern part of YHRV. Meanwhile, an anomalous cyclone accompanied with the anticyclone locates over East China Sea and brings more precipitation to the southern part of YHRV. In the post-1991 epoch, the persistent simultaneous warming in eastern equatorial Pacific and Indian Ocean leads to abundant moisture brought to southern China. Further analysis suggests that the two types of ENSO have asymmetric features with respect to the impact of their positive and negative phases on the seesaw-like Meiyu rainfall, which is closely related with EM La Niña (CE El Niño) in the pre-1991 epoch (post-1991 epoch). Key Points Decadal change of Meiyu rainfall around 1991ENSO Modoki and Conventional ENSOAsymmetric response of ENSO ©2013. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63330
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing, China; School of Atmospheric Sciences, Nanjing University, Nanjing Jiangsu 210093, China
Recommended Citation:
Zhu J.,Huang D.-Q.,Zhang Y.-C.,et al. Decadal changes of Meiyu rainfall around 1991 and its relationship with two types of ENSO[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(17)