Mesoscale and wind-driven intra-annual variability in the East Auckland Current
- UNCW Author/Contributor (non-UNCW co-authors, if there are any, appear on document)
- Sutara Suanda (Creator)
- Institution
- The University of North Carolina Wilmington (UNCW )
- Web Site: http://library.uncw.edu/
Abstract: Intra-annual variability in the East Auckland Current (EAuC) was studied using a year-long timeseries of in situ and remotely-sensed velocity, temperature and salinity observations. Satellite-derived velocities correlated well () with in situ observations and well-represent the long-term ( days) variability of the upper ocean circulation. Four mesoscale eddies were observed during the year (for 260 days) which generated distinct flows between the continental slope and rise. The EAuC dominated the circulation in the continental shelf break, slope and rise for 110 days and generated the most energetic events associated with wind forcing. Current variability on the continental slope was coherent with along-slope wind stress (wind stress curl) at periods between 4 and 12 days (16 and 32 days). We suggest that along-slope winds generated offshore Ekman transport, uplift on the shelf-break, and a downwind geostrophic jet on the slope. In contrast, positive wind stress curl caused convergence of water, downwelling, and increased the current speed in the region. Bottom Ekman transport, generated by the EAuC, was suggested to have caused the largest temperature anomaly (-1.5 degrees Celsius) at the continental shelf-break.
Mesoscale and wind-driven intra-annual variability in the East Auckland Current
PDF (Portable Document Format)
5431 KB
Created on 8/29/2024
Views: 18
Additional Information
- Publication
- Santana, R., Suanda, S. H., Macdonald, H., & O'Callaghan, J. (2021). Mesoscale and wind-driven intra-annual variability in the east auckland current. Scientific Reports, 11(1), 9764-9764. https://doi.org/10.1038/s41598-021-89222-3
- Language: English
- Date: 2021