What is it about?

Sea surface temperatures (SST) in the North Atlantic Ocean exhibit multidecadal fluctuations and known to influence Asian climate. We explored the relation between summer climate over South and East Asia and its dependence on the SST patterns associated with positive and negative phases of Atlantic multidecadal oscillation using sets of idealized model experiments.

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Why is it important?

Our findings shows that the Atlantic multidecadal oscillation (AMO) influences the summer climate of East Asia through an extratropical atmospheric circulation pathway (i.e. Rossby wave train), whereas South Asian summer monsoon precipitation is linked to the AMO partly via a tropical pathway (i.e. Intertropical Convergence Zone). These tropical and extratropical pathways that cause a response of the South and East Asia summer climate to the AMO are sensitive to the pattern of AMO SST anomalies, and to whether they are confined to the North Atlantic/Arctic or outside the North Atlantic that are still associated with the AMO. The results obtained in this study help in understanding further the potential for the AMO to generate multidecadal variability in South and East Asian climate.

Perspectives

Writing this paper with my co-authors was a great pleasure as it gave more understanding about the climate variability and teleconnections as well as the Asian summer monsoon which have been remained my prime focus of research. I hope you will find this article interesting.

Dr. Satyaban B Ratna
University of East Anglia

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This page is a summary of: The Influence of Atlantic Variability on Asian Summer Climate Is Sensitive to the Pattern of the Sea Surface Temperature Anomaly, Journal of Climate, July 2020, American Meteorological Society, DOI: 10.1175/jcli-d-20-0039.1.
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