Intercomparing drifts from eddy-resolving and cycling floats in the deep western boundary current along the Mid-Atlanic Ridge.

Machin, F., Send, Uwe and Zenk, Walter (2006) Intercomparing drifts from eddy-resolving and cycling floats in the deep western boundary current along the Mid-Atlanic Ridge. Open Access Scientia Marina, 70 (1). pp. 1-8.

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Abstract

The Lagrangian nature of cycling floats is evaluated in the framework defined by the Deep Western Boundary Current of the Mid-Atlantic Ridge. In a statistical approach, speeds and drifts are estimated for an APEX cycling float and compared with the velocities inferred from a park ensemble of four eddy-resolving RAFOS floats. They were deployed at the same location and ballasted for drifting at the same mission depth. Displacement errors induced by geostrophic shear and wind forced currents are analyzed. We observe that the velocity estimated from the RAFOS floats is not statistically different from the velocity estimated from the APEX float. Likewise, the initial separation between the cycling float and a simultaneously deployed RAFOS float has been studied in terms of the turbulent diffusivity. Though the performance of this study in comparable cases without a mean current field may be limited, these oceanic observations support exploiting the Lagrangian nature of the cycling floats.

Document Type: Article
Keywords: eddy-resolving and cycling floats; deep western boundary current along the Mid-Atlanic Ridge; cycling float, APEX, RAFOS; Lagrangian; Deep Western Boundary Current (DWBC)
Research affiliation: OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-PO Physical Oceanography
Refereed: Yes
Open Access Journal?: Yes
Date Deposited: 23 Sep 2009 11:36
Last Modified: 22 Jan 2018 14:05
URI: http://oceanrep.geomar.de/id/eprint/5089

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