[Eoas-seminar] [Seminar-announce] Scientific Computing Colloquium with Eric Chassignet

[eoas-seminar at lists.fsu.edu]

"High-Resolution North Atlantic Ocean Modeling: Impact of bathymetry, tides, and atmospheric forcing"

Eric Chassignet
Director, Center for Ocean-Atmospheric Prediction Studies (COAPS)
Florida State University (FSU)

Please feel free to forward/share this invitation with other groups/disciplines that might be interested in this talk/topic. All are welcome to attend.

NOTE: In-person attendance is requested. Zoom access is intended for external (non-departmental) participants only.

https://fsu.zoom.us/j/94273595552
Meeting # 942 7359 5552

🎦 Colloquium recordings will be made available here, https://www.sc.fsu.edu/colloquium

Wednesday, Nov 29, 2023, Schedule:

* 3:00 to 3:30 PM Eastern Time (US and Canada)
☕ Nespresso & Teatime - 417 DSL Commons

* 3:30 to 4:30 PM Eastern Time (US and Canada)
🕟 Colloquium - 499 DSL Seminar Room

Abstract:
In Chassignet and Xu (2017), the authors argued that the next threshold for a significant improvement in western boundary currents representation (i.e., the Gulf Stream in the North Atlantic) is an increase in the horizontal resolution from an eddying 1/10° to a submesoscale enabled 1/50° grid spacing. They showed that, as the resolution is increased to 1/50° (~ 1.5 km at mid-latitudes) from 1/12°, the representation of Gulf Stream penetration and associated recirculating gyres shifts from unrealistic to realistic and that the penetration of eddy kinetic energy into the deep ocean is drastically different and closely resembles observations. They however noted several discrepancies between the high-resolution 1/50° numerical simulation and observations. The first one was no variability in the sea surface height spectra wavenumber spectral slope between high/mid-latitudes and the equator. The second one was an area of high sea surface height variability and surface EKE wider than observed near the New England seamount chain which suggests that interactions with the topography may be overemphasized in this model configuration. We will show that the inclusion of high-resolution bathymetry, tides, and atmospheric feedback significantly improve the model's abilities to represent the observed ocean variability and Gulf Stream pathway.

Additional colloquium details can be found here,
https://www.sc.fsu.edu/news-and-events/colloquium/1764-colloquium-with-eric-chassignet-2023-11-29
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