Ground truthing modeled-kPAR and on deck primary productivity incubations with in-situ observations

Richard T. Barber; Lisa Borden; Zachary Johnson; John Marra; Carol Knudson; Charles C. Trees

doi:10.1117/12.266409

6 February 1997 Ground truthing modeled-k_PAR and on-deck primary productivity incubations with in-situ observations

Richard T. Barber, Lisa Borden, Zachary Johnson, John Marra, Carol Knudson, Charles C. Trees

Proceedings Volume 2963, Ocean Optics XIII; (1997) https://doi.org/10.1117/12.266409
Event: Ocean Optics XIII, 1996, Halifax, Nova Scotia, Canada

Abstract

The Arabian Sea Process Study carried out on six cruises in 1995 provided observations that make possible the ground truthing of model estimates of k_PAR and on deck productivity incubations with direct k_PAR observations and in situ productivity incubations. THe Morel 1988 optical model did a good job of reproducing the observed values. Comparison of on deck and in situ depth profiles suggested that on deck incubators received more irradiance across the entire light gradient. This subsidy in E₀ apparently came from efficient absorption of reflected light and low angle sunlight by small incubators. When depths were recalculated taking into account the irradiance subsidy, profiles of productivity as a function of depth determined by on deck incubations were essentially identical to in situ profiles.

Citation Download Citation

Richard T. Barber, Lisa Borden, Zachary Johnson, John Marra, Carol Knudson, and Charles C. Trees "Ground truthing modeled-k_PAR and on-deck primary productivity incubations with in-situ observations", Proc. SPIE 2963, Ocean Optics XIII, (6 February 1997); https://doi.org/10.1117/12.266409

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