Carlson, C. A. Bermuda Biological Station for Research Inc, ccarlson@sargasso.bbsr.edu
Hansell, D. A. Bermuda Biological Station for Research, dennis@bbsr.edu
Peltzer, E. T. Monterey Bay Research Institute, etp3@mbari.org

 
TOC AND DOC DISTRIBUTION ALONG THE 76 30'S TRANSECT LINE DURING SPRING PHYTOPLANKTON BLOOMS IN THE ROSS SEA, ANTARCTICA
 
TOC and DOC distribution along the 76 30'S line in the Ross Sea were measured during several cruises to the Ross Sea during spring phytoplankton blooms from 1995 - 1997. The cruises were conducted during the Ross Sea Polynya Project (RSPP) and the AESOPS program and covered various periods of the phytoplankton blooms from late austral winter to autumn. DOC and TOC data from various years (1995- 1996) will be presented as a composite of a seasonal cycle. While there was significant spatial and temporal variability, this composite presents a general view of organic C partitioning of organic carbon that accumulates during the Ross Sea spring bloom. During late winter / early spring TOC concentrations were at background concentrations of 42-43 uM C comprised mostly of DOC. As the spring phytoplankton bloom progressed TOC concentrations increase to > 115 uM C. During late summer (January / February.) newly produced DOC concentrations increased by as much 20 uM C in the surface 50 m. However, the majority of TOC was partitioned as POC. DOC concentrations were reduced to background values by autumn. The percentage of net community production which accumulated as DOC averaged approximately 15% during the December - February.
 
Day: Wednesday, Feb. 3
Time: Poster
Location: Sweeney Center
 
Code: SS31WE0980S