SS3.03 Recent Advances in Coastal and River Plume Remote Sensing
Date: Thursday, June 13, 2002
Time: 4:15:00 PM
Location: View Royal
BisagniJJ, University of Massachusetts, School for Marine Science & Technology, New Bedford, MA, USA,
Satellite-Derived Sea Surface Temperature Variability and Vertically-Integrated Nitrate Over the Gulf of Maine and Georges Bank Region During 1987
Satellite-derived sea surface temperatures (SST) on southern Georges Bank from 1987 show variability related to the variation of tidal stirring associated with the spring-neap (monthly and fortnightly) tidal cycle in both the seasonally-stratified and well-mixed regions of the Bank (Bisagni and Sano, 1993). Recent work shows similar variability for five hydrographic provinces which encompass the entire Gulf of Maine region, including all of Georges Bank, over the same 1987 time period, suggesting some degree of tidally-related control of SST over this much larger domain. Functional linear regressions computed between log-transformed integrated nitrate (NO3) contained within the euphotic zone and near-surface temperature for these same five hydrographic provinces allow computation of the temporal variability of this biologically-active bulk quantity related to the variation in tidal stirring. Variations in SST at lower wintertime and spring temperatures result in larger variations in integrated nitrate than during periods of higher summer and fall temperatures due to the semi-log nature of the regression equations. Bisagni, J. J. and M. H. Sano. 1993. Satellite observations of sea surface temperature variability on southern Georges Bank. Continental Shelf Research, 13:1045-1064.