Tenenbaum, J. Cornell University, jlt13@cornell.edu
Monger, B. Cornell University, monger@geology.cornell.edu

 
SEASONAL CHANGES IN SEAWIFS DERIVED CHLOROPHYLL CONCENTRATION WITHIN OBJECTIVELY PRESCRIBED HYDROGRAPHIC PROVINCES IN THE GULF OF MAINE REGION
 
A seasonal climatology of sea surface temperature (SST) was derived from AVHRR imagery and used to objectively determine hydrographic provinces within the Gulf of Maine region. Distinctly different sets of hydrographic provinces were derived from, respectively, seasonal maximum and minimum SST and the amplitude of seasonal change in SST (i.e., SST maximum - SST minimum). The progression of the 1998 spring phytoplankton bloom was measured within each of the hydrographic provinces using chlorophyll estimates derived from daily SeaWiFS imagery. The magnitude of the 1998 spring bloom, in terms of accumulated standing stock, was determined by integrating chlorophyll over the spring bloom period in each of the hydrographic regions. The magnitude of the spring bloom was found to be positively correlated with the magnitude of seasonal change in SST. These observations support our conventional understanding of the influence of hydrographic processes on spring phytoplankton blooms in temperate oceans. Moreover, these observations suggest that seasonal SST variation derived from AVHRR imagery may be a useful way to objectively prescribe faunal boundaries that to date have mostly been prescribed subjectively.
 
Day: Tuesday, Feb. 2
Time: 09:15 - 09:30am
Location: Sweeney Center
 
Code: SS43TU0915S