Inter-annual relationship between Atlantic sea surface temperature anomalies and Indian summer monsoon

Details Inter-annual relationship between Atlantic sea surface temperature anomalies and Indian summer monsoon Inter-annual relationship between Atlantic sea surface temperature anomalies and Indian summer monsoon

Nov 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008georl..3521704r&link_type=abstract

Geophysical Research Letters, Volume 35, Issue 21, CiteID L21704

Physics

6

Global Change: Climate Variability (1635, 3305, 3309, 4215, 4513), Atmospheric Processes: Climatology (1616, 1620, 3305, 4215, 8408), Atmospheric Processes: General Circulation (1223), Biogeosciences: Climate Dynamics (1620), Global Change: Climate Dynamics (0429, 3309)

Scientific paper

In this study, the simultaneous inter-annual relationships between SST anomalies over the Northwest Atlantic Ocean and southwest monsoon rainfall over the monsoon core region have been examined using monthly SST and atmospheric data for the period 1951-2005. Statistical analyses reveal significant inter-annual simultaneous relationship between the SST anomalies over North Atlantic and rainfall over the monsoon core region, but with significant epochal variations. The relationship has become stronger after mid-1970s when the El Nino-Indian monsoon relationship has weakened. Positive SST anomalies over the North Atlantic Ocean shift the North Atlantic Jet northwards and the associated circulation changes in the upper troposphere influence Indian monsoon through the circumglobal teleconnection across central Asia. The present study, thus highlights the important role of North Atlantic Ocean as an important source of inter-annual variability of the Indian summer monsoon.

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