干旱区生态环境知识资源中心(Arid): Diverging monthly rainfall trends in south peninsular India and their association with global climate indices

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DOI	10.1007/s00477-022-02272-5
	Diverging monthly rainfall trends in south peninsular India and their association with global climate indices
	Mathew, Micky; Sreelash, K.; Jacob, Amala Anie; Mathew, Merin Mariam; Padmalal, D.
通讯作者	Sreelash, K
来源期刊	STOCHASTIC ENVIRONMENTAL RESEARCH AND RISK ASSESSMENT
ISSN	1436-3240
EISSN	1436-3259
出版年	2023
卷号	37 期号:1 页码:27-48
英文摘要	With the frequent recurrence of hydroclimatic hazards, such as rainfall-induced floods and landslides, it is essential to look at the spatio-temporal evolution of rainfall trends and teleconnections of regional rainfall with global climatic indices. The present study is carried out in two climatologically contrasting terrains, the humid regions in the western side of South-Peninsular India (SPI-W) and semi-arid to arid regions in the eastern side of South-Peninsular India (SPI-E). Trends in the rainfall were studied over a long-term (1901-2020) gridded rainfall data, and change points were detected using the Pettitt's test. An expanding-sliding window trend analysis based on Kendall's Taub was carried out to decode the time evolution of rainfall trends and to differentiate consistent gradual monotonic trends from step changes. Two distinct change points were observed in the rainfall, the first in the 1960s and second in 1990s. SPI-E manifested a strong positive trend in the monsoon rainfall after 1990's while SPI-W demonstrated a weakening in rainfall after 1960's. The regionally diverse trends during the recent epochs are evaluated along with IOD (Indian Ocean Dipole) and it was observed that there is a significant increase in co-occurrence of positive rainfall anomaly, positive IOD and positive ENSO (El Nino Southern Oscillation) events after 1990. Increase in positive IOD events could be associated with the changes in the regional rainfall during these recent epochs. The trends in monthly and annual rainfall showed high sensitivity to data periods and data lengths, highlighting the need to perform such comprehensive analysis for the planning of reservoir operations, water management and agricultural activities.
英文关键词	South Indian rainfall Monthly trend analysis Expanding sliding window trend analysis
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000830259100001
WOS关键词	SUMMER MONSOON RAINFALL ; OCEAN DIPOLE ; PRECIPITATION
WOS类目	Engineering, Environmental ; Engineering, Civil ; Environmental Sciences ; Statistics & Probability ; Water Resources
WOS研究方向	Engineering ; Environmental Sciences & Ecology ; Mathematics ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/398722
推荐引用方式 GB/T 7714	Mathew, Micky,Sreelash, K.,Jacob, Amala Anie,et al. Diverging monthly rainfall trends in south peninsular India and their association with global climate indices[J],2023,37(1):27-48.
APA	Mathew, Micky,Sreelash, K.,Jacob, Amala Anie,Mathew, Merin Mariam,&Padmalal, D..(2023).Diverging monthly rainfall trends in south peninsular India and their association with global climate indices.STOCHASTIC ENVIRONMENTAL RESEARCH AND RISK ASSESSMENT,37(1),27-48.
MLA	Mathew, Micky,et al."Diverging monthly rainfall trends in south peninsular India and their association with global climate indices".STOCHASTIC ENVIRONMENTAL RESEARCH AND RISK ASSESSMENT 37.1(2023):27-48.