Abbott, M. R. Oregon State University, mark@oce.orst.edu
Richman, J. R. Oregon State University, jr@oce.orst.edu
Bartlett, J. S. Oregon State University, jasmine@oce.orst.edu

 
DRIFTER AND MOORING OBSERVATIONS OF MESOSCALE BIOLOGICAL/PHYSICAL PROCESSES IN THE ANTARCTIC POLAR FRONTAL ZONE
 
Mesoscale physical processes are important features of ocean circulation in the Antarctic Polar Frontal Zone (APFZ). Multi-year time series of SST derived from satellite imagery reveal intense meanders in the APFZ which create areas of strong upwelling and downwelling through the conservation of vorticity. The impacts of these meanders can be seen in SeaWiFS ocean color imagery. To study these processes, we deployed clusters of conventional and bio-optical surface drifters as part of the U.S. JGOFS Antarctic Environment Southern Ocean Process Study (AESOPS) which transmitted data for 3-6 months after deployment. We also established a high-resolution moored array of bio-optical sensors, current meters, and conductivity/temperature sensors in the APFZ for 5 months. These data sets revealed a spring bloom at the APFZ that persisted for about one month in response to increased stratification. We will present a detailed statistical analysis of the circulation patterns as revealed by the moorings and drifters, and their impact on chlorophyll concentration and photoadaptation (as indicated by sun-stimulated chlorophyll fluorescence). These results will be placed in the larger temporal and spatial context of SeaWiFS imagery as well as the more detailed measurements of biological and chemical processes made by other AESOPS investigators.
 
Day: Wednesday, Feb. 3
Time: 02:45 - 03:00pm
Location: Sweeney Center
 
Code: SS31WE0245S