3-7 September 2018
Audimax | Kiel University
Europe/Berlin timezone

Driving mechanisms for maintaining the equatorial deep jets and the quasi-steady flanking jets and the implications for the equatorial oxygen budget

3 Sep 2018, 16:45
Audimax-Hörsaal-D (Kiel University)


Kiel University

Oral 03 Ventilation and Oxygen Supply 03 Ventilation and Oxygen Supply


Prof. Martin Claus (GEOMAR)


The equatorial deep jets and the quasi-steady flanking jets are part of the zonal jet system in the equatorial ocean and play a role in setting the equatorial maximum in oxygen that has been known since the Meteor cruises from the 1920’s. Nevertheless, these zonal jets are missing from the models we use for ocean/climate studies, even ocean models with high horizontal resolution. Here we present a new perspective on the dynamics of the equatorial ocean and show, using mooring data and idealized model simulations, that the equatorial deep jets are maintained by the convergence of meridional flux of zonal momentum on the equator associated with intraseasonal waves, analogous to the maintenance of the atmospheric jet stream by mid-latitude storm systems. The main driving mechanism for the quasi-steady flanking jets might be related to the existence of equatorial deep jets producing a zonal flux of zonal momentum thus maintaining a nearly depth independent westward flow at the equator embedded in eastward flow at 2° latitude on both sides of the equator. The implications for modelling the oxygen distribution in the equatorial ocean will be discussed

Position Professor
Affiliation GEOMAR Helmholtz Centre for Ocean Research Kiel and Kiel University
Are you a SFB 754 / Future Ocean member? Yes
Email Address rgreatbatch@geomar.de

Primary author

Prof. Martin Claus (GEOMAR)


Prof. Richard Greatbatch (GEOMAR) Prof. Peter Brandt (GEOMAR)

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