DOI: 10.1007/s00382-012-1494-x
Scopus记录号: 2-s2.0-84878107251
论文题名: Long-term variability in the date of monsoon onset over western India
作者: Adamson G.C.D. ; Nash D.J.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2013
卷: 40, 期: 2017-11-12 起始页码: 2589
结束页码: 2603
语种: 英语
英文关键词: Documentary evidence
; ENSO
; Summer monsoon
; Western India
英文摘要: The date of onset of the southwest monsoon in western India is critical for farmers as it influences the timing of crop plantation and the duration of the summer rainy season. Identifying long-term variability in the date of monsoon onset is difficult, however, as onset dates derived from the reanalysis of instrumental rainfall data are only available for the region from 1879. This study uses documentary evidence and newly uncovered instrumental data to reconstruct annual monsoon onset dates for western India for the period 1781-1878, extending the existing record by 97 years. The mean date of monsoon onset over the Mumbai (Bombay) area during the reconstruction period was 10 June with a standard deviation of 6.9 days. This is similar to the mean and standard deviation of the date of monsoon onset derived from instrumental data for the twentieth century. The earliest identified onset date was 23 May (in 1802 and 1839) and the latest 22 June (in 1825). The longer-term perspective provided by this study suggests that the climatic regime that governs monsoon advance over western India did not change substantially from 1781 to 1955. Monsoon onset over Mumbai has occurred at a generally later date since this time. Our results indicate that this change is unprecedented during the last 230 years. Following a discussion of the results, the nature of the relationship between the date of monsoon onset and the El Niño-Southern Oscillation is discussed. This relationship is shown to have been stable since 1781. © 2012 Springer-Verlag. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54885
Appears in Collections: 过去全球变化的重建
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作者单位: School of Environment and Technology, University of Brighton, Lewes Road, Brighton, BN2 4GJ, United Kingdom; School of Geography, Archaeology and Environmental Studies, University of the Witwatersrand, Private Bag 3, Wits, 2050, South Africa
Recommended Citation:
Adamson G.C.D.,Nash D.J.. Long-term variability in the date of monsoon onset over western India[J]. Climate Dynamics,2013-01-01,40(2017-11-12)