[Eoas-seminar] Fw: Reminder EOAS Colloquium Friday Oct 14 at 3pm - TODAY

[eoas-seminar at lists.fsu.edu]

Hi all,

The following is the zoom link for Mark's colloquium today

 https://fsu.zoom.us/j/91292081924?pwd=dWtUWEV2QW1uRTVvVkxQREFmZlkzdz09.

in case you will not be able to attend in person. The colloquium room is the same as usual, EOA 1050.

Cheers,

Zhaohua

________________________________
From: Eoas-seminar <eoas-seminar-bounces at lists.fsu.edu> on behalf of eoas-seminar--- via Eoas-seminar <eoas-seminar at lists.fsu.edu>
Sent: Friday, October 14, 2022 7:26 AM
To: EOAS seminar <eoas-seminar at lists.fsu.edu>
Subject: [Eoas-seminar] Reminder EOAS Colloquium Friday Oct 14 at 3pm - TODAY

Please join us for our next EOAS Colloquium speaker, Dr. Mark Bourassa of EOAS, TODAY at 3pm:

Title:  Roles and Impacts of Current, Surface Stress and Wind Interactions in a Coupled Ocean/Atmosphere System

Interaction between the ocean and the atmosphere on ‘large’ scales is usually thought of as dominated by thermodynamic interactions influencing the atmosphere and both wind stress and thermodynamics influencing the ocean. For models with grid spacing exceeding 20 km the role of currents in modifying this coupling is quite small. As model resolution improves, currents have been shown to have a substantial impact on the ocean. Accounting for how currents modify stress causes has been explored for ocean impacts while assuming that the atmosphere is otherwise unchanged. This modified stress results in more vertical motion in the ocean’s mixed layer and excessively reduces ocean eddies. These ocean responses will be demonstrated with and without atmospheric responses and it well be shown that these responses are very important and that they are highly dependent on atmospheric resolution. At sufficiently high resolution the atmosphere is much more variable than with coarser grid spacing, and currents contribute to organizing some of this variability, further complicating the ocean response. Part of the atmospheric response to currents will be shown to be patterns of curl and divergence of surface wind and stress, with a vorticity structure that extends to the top of the atmospheric boundary-layer and extends horizontally well beyond the strong current gradients. For the region and season examined, this coupling process causes modest changes in the atmospheric mean state. The impacts are wind speed dependent with a greater response associated with higher wind speeds. Interactions with an atmospheric front will be used to demonstrate relatively extreme atmospheric changes associated with ocean surface currents.


If you need a zoom link, please contact Dr. Zhaohua Wu zwu at fsu.edu<mailto:zwu at fsu.edu>.

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