Richardson, M. TAMU, mrichardson@ocean.tamu.edu
Gardner, W. TAMU, wgardner@ocean.tamu.edu
Smith, W. O.. VIMS, wos@vims.edu

 
SEASONAL AND SPATIAL VARIABILITY IN POC DISTRIBUTIONS IN THE ROSS SEA
 
Seasonal and spatial changes in POC and chlorophyll were measured during process cruises in the Ross Sea by calibrating continuous measurements with a transmissometer and a fluorometer with discrete measurements of POC and chlorophyll from bottle samples. A transect along 76.5 S from 169 E to 178 W was occupied twice in October, 1996 (early spring), twice in January - February 1997 (bloom period), once in April, 1997 (fall), and four times in November, 1997 (early bloom period). Preliminary analysis indicates that the POC concentrations in the upper 100 m were less than 1-2 micromoles C/l prior to the bloom, reached 100 micromoles C/l in January, declined back to 1-2 micromoles C/l in April and again reached 100 micromoles C/l in November. This is a significant buildup and a rapid loss of POC. The general trends of highs and lows during the two bloom cruises were similar for beam attenuation and chlorophyll fluorescence and showed significant variation in the vertical structure related to the hydrography.
 
Day: Wednesday, Feb. 3
Time: Poster
Location: Sweeney Center
 
Code: SS31WE0619S