FOUR-YEAR OBSERVATIONS OF INTERFACIAL FORM STRESS IN THE NORTHERN DRAKE PASSAGE
Interfacial form stress (IFS) is thought to be the primary mechanism for carrying momentum from the sea surface to the sea floor in the zonally-averaged Antarctic Circumpolar Current (ACC). For quasi-geostrophic flow, downward momentum flux is proportional to poleward heat flux; thus understanding the structure and variability of IFS can help to unravel not only the momentum balance in the ACC, but also how heat is transferred meridionally across the fronts. The cDrake experiment provides a detailed 4-D picture of the vertical and horizontal structure of IFS in a region spanning 100-km cross-stream and 250-km alongstream in northern Drake Passage. Objectively-mapped daily fields of the vertical, cross- and along-stream structure of ocean currents and temperature with mesoscale resolution over a period of four years are used to estimate terms in the momentum balance. In particular, the high-resolution estimates of the mean structure and variability of the IFS term are used to investigate the mechanism by which the wind input of momentum is distributed in a regional balance for northern Drake Passage.
Millar, J. J., Scripps Institution of Oceanography , USA, firstname.lastname@example.org
Chereskin, T. K., Scripps Institution of Oceanography, USA, email@example.com
Watts, D. R., University of Rhode Island, USA, firstname.lastname@example.org
Time: 16:00 - 18:00
Location: Poster/Exhibit Hall
Presentation is given by student: Yes