Flux de chaleur vertical océanique : importance des sous méso-échelles en profondeur

– Lia SIEGELMAN – Scripps Institution of Oceanography, University of California, San Diego, USA –

Abstract: This talk investigates how oceanic vertical heat transport is impacted by deep-reaching submesoscale fronts (down to 1000 m). Based on a combination of satellite observations, in situ data and high-resolution numerical models, we show that submesoscale fronts drive an anomalous upward heat transport from the ocean interior back to the surface that could help close the spurious temperature drift present in climate models. This effect can potentially alter oceanic heat uptake and will be strongest in eddy-rich regions such as the Antarctic Circumpolar Current, the Kuroshio Extension, and the Gulf Stream, all of which are key players in the climate system. As such, submesoscale fronts provide an important, yet unexplored, pathway for the transport of heat, chemical and biological tracers, between the ocean interior and the surface, with potential major implications for the biogeochemical and climate systems. We then explore the possibility to monitor these fluxes from space.

Lien webinaire : https://cnrs.zoom.us/j/99120328723?pwd=OVZkUmZTVFVEVFI2Rkx1dlVNTmtBZz09

ID de réunion : 991 2032 8723
Code secret : cfAWV0