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Summer monsoon rainfall variability over North East regions of India and its association with Eurasian snow, Atlantic Sea Surface temperature and Arctic Oscillation

Prabhu, A and Oh, J and Kim, I-W and Kripalani, RH and Mitra, AK and Pandithurai, G (2017) Summer monsoon rainfall variability over North East regions of India and its association with Eurasian snow, Atlantic Sea Surface temperature and Arctic Oscillation. Climate Dynamics, 49 (7-8). pp. 2545-2256.

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Abstract

This observational study during the 29-year period from 1979 to 2007 evaluates the potential role of Eurasian snow in modulating the North East-Indian Summer Monsoon Rainfall with a lead time of almost 6 months. This link is manifested by the changes in high-latitude atmospheric winter snow variability over Eurasia associated with Arctic Oscillation (AO). Excessive wintertime Eurasian snow leads to an anomalous cooling of the overlying atmosphere and is associated with the negative mode of AO, inducing a meridional wave-train descending over the tropical north Atlantic and is associated with cooling of this region. Once the cold anomalies are established over the tropical Atlantic, it persists up to the following summer leading to an anomalous zonal wave-train further inducing a descending branch over NE-India resulting in weak summer monsoon rainfall.

Item Type: Article
Additional Information: Copyright of this article belongs to Springer International Publishing
Uncontrolled Keywords: Summer Monsoon; Snow Water Equivalent; Boreal Winter; Summer Monsoon Rainfall; Arctic Oscillation
Subjects: Meteorology and Climatology
Depositing User: IITM Library
Date Deposited: 17 Apr 2018 04:04
Last Modified: 17 Apr 2018 04:04
URI: http://moeseprints.incois.gov.in/id/eprint/4502

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