A physical mechanism for North Atlantic SST influence on the Indian summer monsoon
A link between the Atlantic Multidecadal Oscillation (AMO) and multidecadal variability of the Indian summer monsoon rainfall is unraveled and a long sought physical mechanism linking Atlantic climate and monsoon has been identified. The AMO produces persistent weakening (strengthening) of the merid...
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ftiiscindia:oai:eprints.iisc.ernet.in:31886 2023-05-15T17:27:12+02:00 A physical mechanism for North Atlantic SST influence on the Indian summer monsoon Goswami, BN Madhusoodanan, MS Neema, CP Sengupta, Debasis 2006-01 application/pdf http://eprints.iisc.ernet.in/31886/ http://eprints.iisc.ernet.in/31886/1/bng_etal_GRL_2005.pdf http://www.agu.org/pubs/crossref/2006/2005GL024803.shtml unknown American Geophysical Union http://eprints.iisc.ernet.in/31886/1/bng_etal_GRL_2005.pdf Goswami, BN and Madhusoodanan, MS and Neema, CP and Sengupta, Debasis (2006) A physical mechanism for North Atlantic SST influence on the Indian summer monsoon. In: Geophysical Research Letters, 33 (2). pp. 1-4. Centre for Atmospheric & Oceanic Sciences Journal Article PeerReviewed 2006 ftiiscindia 2014-09-27T17:55:17Z A link between the Atlantic Multidecadal Oscillation (AMO) and multidecadal variability of the Indian summer monsoon rainfall is unraveled and a long sought physical mechanism linking Atlantic climate and monsoon has been identified. The AMO produces persistent weakening (strengthening) of the meridional gradient of tropospheric temperature (TT) by setting up negative (positive) TT anomaly over Eurasia during northern late summer/autumn resulting in early (late) withdrawal of the south west monsoon and persistent decrease (increase) of seasonal monsoon rainfall. On inter-annual time scales, strong North Atlantic Oscillation (NAO) or North Annular mode (NAM) influences the monsoon by producing similar TT anomaly over Eurasia. The AMO achieves the interdecadal modulation of the monsoon by modulating the frequency of occurrence of strong NAO/NAM events. This mechanism also provides a basis for explaining the observed teleconnection between North Atlantic temperature and the Asian monsoon in paleoclimatic proxies. Citation: Goswami, B. N., M. S. Madhusoodanan, C. P. Neema, and D. Sengupta (2006), A physical mechanism for North Atlantic SST influence on the Indian summer monsoon Article in Journal/Newspaper North Atlantic North Atlantic oscillation Indian Institute of Science, Bangalore: ePrints@IIsc Indian |
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Open Polar |
collection |
Indian Institute of Science, Bangalore: ePrints@IIsc |
op_collection_id |
ftiiscindia |
language |
unknown |
topic |
Centre for Atmospheric & Oceanic Sciences |
spellingShingle |
Centre for Atmospheric & Oceanic Sciences Goswami, BN Madhusoodanan, MS Neema, CP Sengupta, Debasis A physical mechanism for North Atlantic SST influence on the Indian summer monsoon |
topic_facet |
Centre for Atmospheric & Oceanic Sciences |
description |
A link between the Atlantic Multidecadal Oscillation (AMO) and multidecadal variability of the Indian summer monsoon rainfall is unraveled and a long sought physical mechanism linking Atlantic climate and monsoon has been identified. The AMO produces persistent weakening (strengthening) of the meridional gradient of tropospheric temperature (TT) by setting up negative (positive) TT anomaly over Eurasia during northern late summer/autumn resulting in early (late) withdrawal of the south west monsoon and persistent decrease (increase) of seasonal monsoon rainfall. On inter-annual time scales, strong North Atlantic Oscillation (NAO) or North Annular mode (NAM) influences the monsoon by producing similar TT anomaly over Eurasia. The AMO achieves the interdecadal modulation of the monsoon by modulating the frequency of occurrence of strong NAO/NAM events. This mechanism also provides a basis for explaining the observed teleconnection between North Atlantic temperature and the Asian monsoon in paleoclimatic proxies. Citation: Goswami, B. N., M. S. Madhusoodanan, C. P. Neema, and D. Sengupta (2006), A physical mechanism for North Atlantic SST influence on the Indian summer monsoon |
format |
Article in Journal/Newspaper |
author |
Goswami, BN Madhusoodanan, MS Neema, CP Sengupta, Debasis |
author_facet |
Goswami, BN Madhusoodanan, MS Neema, CP Sengupta, Debasis |
author_sort |
Goswami, BN |
title |
A physical mechanism for North Atlantic SST influence on the Indian summer monsoon |
title_short |
A physical mechanism for North Atlantic SST influence on the Indian summer monsoon |
title_full |
A physical mechanism for North Atlantic SST influence on the Indian summer monsoon |
title_fullStr |
A physical mechanism for North Atlantic SST influence on the Indian summer monsoon |
title_full_unstemmed |
A physical mechanism for North Atlantic SST influence on the Indian summer monsoon |
title_sort |
physical mechanism for north atlantic sst influence on the indian summer monsoon |
publisher |
American Geophysical Union |
publishDate |
2006 |
url |
http://eprints.iisc.ernet.in/31886/ http://eprints.iisc.ernet.in/31886/1/bng_etal_GRL_2005.pdf http://www.agu.org/pubs/crossref/2006/2005GL024803.shtml |
geographic |
Indian |
geographic_facet |
Indian |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_relation |
http://eprints.iisc.ernet.in/31886/1/bng_etal_GRL_2005.pdf Goswami, BN and Madhusoodanan, MS and Neema, CP and Sengupta, Debasis (2006) A physical mechanism for North Atlantic SST influence on the Indian summer monsoon. In: Geophysical Research Letters, 33 (2). pp. 1-4. |
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1766119154098634752 |