High frequency wind forcings and interior oxygen levels.

Duteil, Olaf and Böning, Claus W. (2018) High frequency wind forcings and interior oxygen levels. [Talk] In: Oxygen Deoxygenation Conference 2018. , 03.-07.09.2018, Kiel, Germany .

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Abstract

The near-surface atmosphere layer, and in particular the wind intensity, controls the ocean properties. The Ekman circulation depends of the wind stress, which strength also determines the amount of diffusion in the upper layer. The intensity of the latent and sensible fluxes at surface depend linearly of the wind speed. The wind also directly impacts the biogeochemical cycles as it modulates the kinetic of gases equilibrium such as oxygen. Using an ocean general circulation model we assess here the importance of the high frequency forcing in setting the ocean properties. We remove specifically the “weather frequencies” (<10 days) of the wind component in the forcing of the 1-momentum equation, 2-mixing length scale and 3-surface fluxes. These experiments are based on the normal year of the CORE forcing dataset (COREv2-NYF). We emphasize the importance of the “weather frequencies” in the modulation of the biogeochemical cycles and the oxygen concentration at centennial time scale.

Document Type: Conference or Workshop Item (Talk)
Research affiliation: OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-BM Biogeochemical Modeling
OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-TM Theory and Modeling
OceanRep > SFB 754
Projects: SFB754
Date Deposited: 08 Jan 2019 10:39
Last Modified: 08 Jan 2019 10:39
URI: http://oceanrep.geomar.de/id/eprint/45144

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