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

Details 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

Mar 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30e..68r&link_type=abstract

Geophysical Research Letters, Volume 30, Issue 5, pp. 68-1, CiteID 1264, DOI 10.1029/2002GL015810

Mathematics

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Oceanography: Physical: Eddies And Mesoscale Processes, Oceanography: Physical: Fronts And Jets, Oceanography: Biological And Chemical: Modeling, Oceanography: Biological And Chemical: Biogeochemical Cycles (1615)

Scientific paper

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 (θQG) 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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