loading page

Trapped Heterogeneous Waters in Eddies Cores from In Situ Data
  • Yan Barabinot,
  • Sabrina Speich,
  • Xavier J. Carton
Yan Barabinot
Ecole Normale Supérieure

Corresponding Author:[email protected]

Author Profile
Sabrina Speich
Ecole Normale Supérieure
Author Profile
Xavier J. Carton
Universite de Bretagne Occidentale
Author Profile


In this paper we analyze the effect of material coherence on the transport properties of 9 eddies sampled during research cruises. We check the accuracy of our data and, after reviewing different definitions of coherence, we assess whether these eddies have retained a heterogeneous water mass in their cores. T, S anomalies on isopycnal surfaces are computed to highlight the different thermohaline properties between the eddy core and its surroundings. The maximum of the tracer anomaly is often located below the pycnocline. We find that while some of these eddies are not coherent according to surface data only, they are when their entire 3D structure is considered. We then present two methods for extrapolating eddy volumes from a single hydrographic section. The volume obtained from T,S anomalies on isopycnical surfaces is compared with that obtained by other criteria. Our results show that the outermost closed contour of the Brunt-Väisäla frequency is a good approximation for the eddy boundary when calculating its volume.
05 Mar 2024Submitted to ESS Open Archive
07 Mar 2024Published in ESS Open Archive