Japan Geoscience Union Meeting 2023

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[E] Oral

A (Atmospheric and Hydrospheric Sciences ) » A-CG Complex & General

[A-CG30] Extratropical oceans and atmosphere

Sun. May 21, 2023 10:45 AM - 12:00 PM 201A (International Conference Hall, Makuhari Messe)

convener:Shion Sekizawa(Research Center for Advanced Science and Technology, University of Tokyo), Shota Katsura(Atmosphere and Ocean Research Institute, The University of Tokyo), Yuta Ando(Kyushu University), Shoichiro Kido(JAMSTEC Application Lab), Chairperson:Shota Katsura(Scripps Institution of Oceanography, University of California, San Diego), Shion Sekizawa(Research Center for Advanced Science and Technology, University of Tokyo)


10:45 AM - 11:00 AM

[ACG30-01] Ocean Mesoscale Air-Sea Interactions: Physics, Impacts, and Role of Surface Waves

★Invited Papers

*Hyodae Seo1 (1.Woods Hole Oceanographic Institution)

Keywords:air-sea interaction, western boundary current, surface waves, bulk formula

Recent observations and coupled modeling studies have identified a widespread regime of ocean-atmosphere coupling mediated by mesoscale and submesoscale variability of sea surface temperature and ocean surface currents and their interaction with surface waves. This presentation will provide a broad overview of the current scientific understanding of the physics and the impacts of ocean mesoscale air-sea interaction, as documented in a recent comprehensive review paper by the US CLIVAR Working Group (Seo et al. 2023). I will then discuss the impacts of wave-wind and wave-current interactions on air-sea momentum fluxes. Notable deficiencies are identified in advanced wave-based bulk flux algorithms, such as the COARE v3.5, representing the surface wave impact on the surface drag, especially in mixed sea conditions where swell and short-wind waves co-exist, and the waves are strongly misaligned with the wind and currents. By exploiting the high-resolution coupled model simulations and the analyses of direct covariance flux measurements, various approaches will be attempted to mitigate the deficiencies in COARE, offering a path forward to the improved regime-based understanding and representation of the air-sea-wave interaction physics in high-resolution Earth System models.