Moore, J. Oregon State University, jmoore@oce.orst.edu
Abbott, M. Oregon State University, mark@oce.orst.edu
Richman, J. G. Oregon State University,
Cowles, T. J. Oregon State University,
Smith, W. O. Virginia Institute of Marine Sciences,
Gardner, W. D. Texas A & M University,
Barber, R. T. Duke University,

 
SEAWIFS SATELLITE OCEAN COLOR DATA AT THE US SOUTHERN OCEAN JGOFS LINE ALONG 170W
 
Satellite ocean color estimates of surface chlorophyll concentration from SeaWiFS (Sea-viewing Wide Field-of-view Sensor) are reported for the region centered at 60S by 170W in the Southern Ocean. Four cruises surveyed this region between October 1997 and March 1998, as part of the U.S. Joint Global Ocean Flux Study (JGOFS). Elevated chlorophyll was observed primarily near the major Southern Ocean fronts, near the receding edge of the seasonal ice sheet, and above the Pacific-Antarctic Ridge. The elevated chlorophyll levels associated with the Pacific-Antarctic Ridge are surprising since the crest of this ridge is typically at depths of 2000 m or more. This elevated phytoplankton biomass is likely the result of mesoscale physical-biological interactions where the Antarctic Circumpolar Current (ACC) encounters the ridge. Satellite-derived chlorophyll concentrations were compared with in situ extracted chlorophyll measurements from the four JGOFS cruises. In general, there was good agreement between the two chlorophyll measurements. The satellite data indicates that the JGOFS site along 170W was quite representative of this sector of the Southern Ocean.
 
Day: Wednesday, Feb. 3
Time: 03:30 - 03:45pm
Location: Sweeney Center
 
Code: SS31WE0330S