Eddy-Induced Heat Transport in the Subtropical North Pacific from Argo, TMI, and Altimetry Measurements

By B. Qiu, Shuiming Chen. 2005

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Abstract Basin-scale heat transport induced by mesoscale oceanic eddies is estimated by combining satellite-derived sea surface height and temperature [temperature data are from the TRMM Microwave Imager (TMI)] data with Argo float temperature–salinity data. In the North Pacific Ocean subtropical gyre, warm (cold) temperature anomalies of mesoscale eddies are found to be consistently located to the west of high (low) SSH anomalies. The phase misalignment between the temperature and velocity anomalies, however, is largely confined to the seasonal thermocline, causing most of the eddy-induced heat transport to be carried in the surface 200-m layer. By establishing a statistical relationship between the surface and depth-integrated values of the eddy heat transport, the basin-scale eddy heat transport is derived from the concurrent satellite SSH/SST data of the past six years. In the Kuroshio Extension region, the meandering zonal jet is found to generate oppositely signed eddy heat fluxes. As a result, the ...

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Recent advances in observing mesoscale ocean dynamics with satellite altimetry (2012, background): “Argo data have led to improved space–time sampling of the ocean vertical structure in the upper 2000 m. Qiu and Chen (2005) showed an interesting estimation of basin-scale heat transport induced by mesoscale oceanic eddies in the North Pacific by combining high resolution altimeter and sea surface…”