Cota, G. F.. Old Dominion University,
, . F.. ,

Several approaches for estimating primary production in the Arctic are being evaluated. Simple empirical algorithms are compared with semi-analytical models. Blue-green reflectance (BGR) ratios are related to surface and integrated chlorophyll biomass and integrated production. For net daily primary production only about half of the variance is explained with BGR. However, chlorophyll biomass and production are closely related to fluorescence line height (FLH) obtained from in-water and above-water measurements. Both production and FLH normalized to biomass show nonlinear saturation responses without significant photoinhibition at maximum in situ irradiance. The production to fluorescence ratio is remarkably constant in surface waters, and provides the basis for estimating production. When tuned with high-latitude data semi-analytical models also provide good estimates of primary production.
Day: Thursday, Feb. 4
Time: Poster
Location: Sweeney Center
Code: CS61TH0833S