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Along or across front ocean survey strategy? The estimation of quasi-geostrophic vertical velocities and temperature fluxes

Along or across front ocean survey strategy? The estimation of quasi-geostrophic vertical velocities and temperature fluxes
Along or across front ocean survey strategy? The estimation of quasi-geostrophic vertical velocities and temperature fluxes
In a companion paper we have shown that at the mesoscale, the unusual across front sampling strategy (AL) is more accurate than the usual across front sampling strategy (AC) on hydrographic and bio-chemical properties when the front is sufficiently developed. The cruise design based on the optimal reconstruction of the density fields does however not imply that derived variables like quasi-geostrophic (QG) vertical velocities and temperature fluxes also exhibit minimal associated errors. Here we present results of optimized sampling strategies for diagnostic QG vertical velocities (wQG) and temperature fluxes (QG) derived from the omega equation. Results are illustrated in the same framework, for the Iceland-Faroes oceanic frontal area and for a control model and reveal that at these spatio-temporal scales, the unusual AL may also provide better estimations of vertical velocities and temperature fluxes compared to the classic AC, especially when the front is sufficiently developed.
GEOSTROPHIC FLOW, TEMPERATURE, MODELLING, SAMPLING
0094-8276
art. no.1264
Rixen, M.
e15b7917-e295-4ba7-a825-a7680cf5a0f8
Allen, J.T.
b251a62b-f443-4591-b695-9aa8c4d73741
Pollard, R.T.
0c78b909-8a95-4bd2-82fd-9b11022888fd
Beckers, J-M.
e91ff44d-d233-43fd-aeae-120636c52884
Rixen, M.
e15b7917-e295-4ba7-a825-a7680cf5a0f8
Allen, J.T.
b251a62b-f443-4591-b695-9aa8c4d73741
Pollard, R.T.
0c78b909-8a95-4bd2-82fd-9b11022888fd
Beckers, J-M.
e91ff44d-d233-43fd-aeae-120636c52884

Rixen, M., Allen, J.T., Pollard, R.T. and Beckers, J-M. (2003) Along or across front ocean survey strategy? The estimation of quasi-geostrophic vertical velocities and temperature fluxes. Geophysical Research Letters, 30 (5), art. no.1264. (doi:10.1029/2002GL015810).

Record type: Article

Abstract

In a companion paper we have shown that at the mesoscale, the unusual across front sampling strategy (AL) is more accurate than the usual across front sampling strategy (AC) on hydrographic and bio-chemical properties when the front is sufficiently developed. The cruise design based on the optimal reconstruction of the density fields does however not imply that derived variables like quasi-geostrophic (QG) vertical velocities and temperature fluxes also exhibit minimal associated errors. Here we present results of optimized sampling strategies for diagnostic QG vertical velocities (wQG) and temperature fluxes (QG) derived from the omega equation. Results are illustrated in the same framework, for the Iceland-Faroes oceanic frontal area and for a control model and reveal that at these spatio-temporal scales, the unusual AL may also provide better estimations of vertical velocities and temperature fluxes compared to the classic AC, especially when the front is sufficiently developed.

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Published date: 2003
Keywords: GEOSTROPHIC FLOW, TEMPERATURE, MODELLING, SAMPLING
Organisations: National Oceanography Centre,Southampton

Identifiers

Local EPrints ID: 1983
URI: http://eprints.soton.ac.uk/id/eprint/1983
ISSN: 0094-8276
PURE UUID: 26d83db0-ef5c-43c3-b2a2-3e18d0f2dce1

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Date deposited: 06 May 2004
Last modified: 15 Mar 2024 04:44

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Contributors

Author: M. Rixen
Author: J.T. Allen
Author: R.T. Pollard
Author: J-M. Beckers

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