DOI: 10.1007/s00382-012-1376-2
Scopus记录号: 2-s2.0-84871922235
论文题名: Influence of the Pacific quasi-decadal oscillation on the monsoon precipitation in Nepal
作者: Wang S.-Y. ; Gillies R.R.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2013
卷: 40, 期: 2017-01-02 起始页码: 95
结束页码: 107
语种: 英语
英文关键词: APHRODITE
; Indo-Gangetic plain
; Nepal climate
; Pacific quasi-decadal oscillation
; Prediction
; South Asian monsoon
英文摘要: Nepal's precipitation is uncorrelated with the all-India monsoon precipitation. However, the quasi-decadal variability of precipitation is significant in the Nepal Himalayas but its mechanism has received little attention. Using a set of century-long reanalysis and observations of precipitation, spectral and empirical orthogonal function analyses were conducted to determine the role of the Pacific Quasi-Decadal Oscillation (QDO) in Nepal's precipitation regime. The dynamical and moisture processes involved in the Pacific QDO of the monsoon precipitation in Nepal were also examined. The monsoon precipitation in Nepal is enhanced when southeasterly moisture fluxes, originated from the Bay of Bengal, divert towards the north and subsequently interact with the southern Himalayan foothills. The redirected moisture fluxes are modulated through the Pacific QDO and are embedded in a propagating global wave 1-2 circulation pattern. However, the modulation exhibits a phase shift of 2 years between the precipitation anomalies in Nepal and the extreme phases of the Pacific QDO. A phase shift of this nature ascribes to the low correlation skill between the Nepal precipitation and traditional monsoon indices, such as those of the El Niño-Southern Oscillation and the all-India precipitation. The lagged relationship between the monsoon precipitation and the Pacific QDO is unique to Nepal, the inclusion of which should improve the predictive ability for the Nepal monsoon. © 2012 Springer-Verlag. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54957
Appears in Collections: 过去全球变化的重建
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作者单位: Utah Climate Center, Utah State University, 4820 Old Main Hill, Logan, UT, 84322-4820, United States; Department of Plants, Soils, and Climate, Utah State University, Logan, UT, United States
Recommended Citation:
Wang S.-Y.,Gillies R.R.. Influence of the Pacific quasi-decadal oscillation on the monsoon precipitation in Nepal[J]. Climate Dynamics,2013-01-01,40(2017-01-02)