[Eoas-seminar] EOAS Colloquium at 3:30 PM, Friday, Oct. 9

Fri Oct 9 10:06:50 EDT 2020

Hi all,

Just a reminder that there is an EOAS colloquium today.

The speaker, title and abstract of the talk are

Dr. Shineng Hu of the Columbia University / Duke University

Global climate impacts of Indian Ocean warming

The tropical Indian Ocean (TIO) has warmed by 1°C since the 1950s, at a faster rate than the other tropical oceans. In this talk, I will discuss how this warming can affect the Atlantic Ocean via atmospheric and oceanic teleconnections. Specifically, by reorganizing the atmospheric Walker circulation in the equatorial band, this warming can reduce precipitation in the tropical Atlantic, resulting in pronounced surface salinity anomalies. On multidecadal timescales, these anomalies are advected to northern high latitudes and strengthen the Atlantic meridional overturning circulation (AMOC). The resultant AMOC changes lead to a stronger hemispheric
asymmetry and a northward shifted intertropical convergence zone (ITCZ). On shorter timescales, Indian Ocean warming generates a train of atmospheric planetary waves, which reach the subpolar North Atlantic, strengthen surface westerly winds there, and cool the underlying ocean within a few months to years. This mechanism could potentially explain the suppressed warming in the subpolar North Atlantic (known as the "warming hole") seen in the observational record. Further, I will discuss the implications for past and future climate changes and ocean interbasin teleconnections.

The Zoom Link is

https://fsu.zoom.us/j/92556866443?pwd=bTFlc1Rnc0QrUG84UFlvN1MxdzdlUT09

You may meet the speaker at 3:00 PM through the same zoom link.

See you then.

Cheers,

Zhaohua

==========================

Zhaohua Wu is inviting you to a scheduled Zoom meeting.

Topic: EOAS Colloquium, Oct. 9
Time: Oct 9, 2020 03:00 PM Eastern Time (US and Canada)

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