干旱区生态环境知识资源中心(Arid): Impact of Southern Oscillation and Indian Ocean Dipole on rainfall variability over India: trends and interlinkages during 1871-2017

Arid

DOI	10.1007/s00703-022-00936-z
	Impact of Southern Oscillation and Indian Ocean Dipole on rainfall variability over India: trends and interlinkages during 1871-2017
	Todmal, Rahul S.; Rao, K. Koteswara; Ingle, Sandip; Korade, Mahendra S.
通讯作者	Todmal, RS
来源期刊	METEOROLOGY AND ATMOSPHERIC PHYSICS
ISSN	0177-7971
EISSN	1436-5065
出版年	2022
卷号	134 期号:6
英文摘要	This investigation highlights changes and various facets of inter-connections between rainfall over India and its prominent drivers such as Southern Oscillation (SO) and Indian Ocean Dipole (IOD). As the monsoon rainfall over majority of sub-divisions from Northeast India (NEI) and Central Northeast India regions (53% area) exhibits declining trend, which are reflected in annual rainfall (AR) as well. On the contrary, during the post-1971 period, the post-monsoon rainfall is observed to be decreasing over all the regions, except Peninsular India (PI). Moreover, the contradictory trends in monsoon and post-monsoon rainfall are registered over the PI, Northwest India (NWI) and West Central India regions. The significant increase in IOD (warming over Arabian Sea) is observed with a swift rise after 1960. Under changing climate conditions, a decline in rainfall and an increase in IOD Index (IODI) may aggravate the water scarcity challenge in semi-arid regions. More than 70% of sub-divisions has positive and negative relationship of SO with monsoon and post-monsoon rainfall, respectively. This contradiction is particularly observed over PI Region, which led to weaker SO-AR relationship. As compared to SO-rainfall relationship, almost opposite picture is observed in the case of sub-divisional and regional rainfall (monsoon and post-monsoon)-IOD relationship. The SO-AR relationship displays epochs of weak (1941-1970 and 1995-2016) and strong (1871-1941 and 1970-1995) connections. Interestingly, the strengthening of the IOD-AR relationship is responsible for the weakening of SO-AR and vice-versa, especially during the post-1970 period. It is evident that the strengthening of SO-IOD relationship results in good rainfall over India, as it shows a significant positive relationship and explains about 6 to 38% variations in regional and All-India annual rainfall.
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000879762300001
WOS关键词	NORTHEAST MONSOON RAINFALL ; ASIAN SUMMER MONSOON ; EL-NINO ; INTERANNUAL VARIABILITY ; PENINSULAR INDIA ; RIVER-BASINS ; ENSO ; DROUGHT ; EVENTS ; IOD
WOS类目	Meteorology & Atmospheric Sciences
WOS研究方向	Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/393782
推荐引用方式 GB/T 7714	Todmal, Rahul S.,Rao, K. Koteswara,Ingle, Sandip,et al. Impact of Southern Oscillation and Indian Ocean Dipole on rainfall variability over India: trends and interlinkages during 1871-2017[J],2022,134(6).
APA	Todmal, Rahul S.,Rao, K. Koteswara,Ingle, Sandip,&Korade, Mahendra S..(2022).Impact of Southern Oscillation and Indian Ocean Dipole on rainfall variability over India: trends and interlinkages during 1871-2017.METEOROLOGY AND ATMOSPHERIC PHYSICS,134(6).
MLA	Todmal, Rahul S.,et al."Impact of Southern Oscillation and Indian Ocean Dipole on rainfall variability over India: trends and interlinkages during 1871-2017".METEOROLOGY AND ATMOSPHERIC PHYSICS 134.6(2022).