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Southern Ocean Circulation and Frontal Dynamics from Cryosat-2 Along-track Radar Altimetry

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If you have a question about this talk, please contact Dr Ryan Patmore .

In this talk, the large-scale circulation of the Southern Ocean is investigated through the use of Dynamic Ocean Topography (DOT), the difference between the Sea Surface Height (SSH) measured by satellite altimetry and the Earth’s geoid. Using the enhanced spatial coverage of the Southern Ocean from Cryosat-2, a novel along-track DOT dataset is derived and presented, which exploits the high resolution data inherent in the along-track SSH measurements. The effect of using different geoid models in the DOT calculation is also investigated. This new dataset is then used to analyse inter-annual and seasonal variability in the DOT and currents of the Southern Ocean, revealing relationships with large-scale climate modes, wind forcing and ocean mass changes. Additionally, the along-track DOT is used to detect locations of fronts and jets in the Antarctic Circumpolar Current, and to investigate inter-annual variability in these frontal positions.

This talk is part of the British Antarctic Survey - Polar Oceans seminar series series.

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