Aquatic Sciences Meeting, Albuquerque 2001

CS24 Optics

Date: Tuesday, February 13, 2001, Time: 2:15:00 PM

Location: Sandia/Santa Ana

Son, S, , Univ. of New Hampshire, Durham, USA, shson@darkstar.sr.unh.edu

Dowell, M, , Univ. of New Hampshire, Durham, USA, mark.dowell@unh.edu

Campbell, J, W, Univ. of New Hampshire, Durham, USA, campbell@kelvin.sr.unh.edu

Yoo, S, , Korea Ocean Research & Development Institute, Ansan, Republic Of Korea, sjyoo@kordi.re.kr

PRIMARY PRODUCTION MODELING IN CASE II WATERS: FORMULATION FOR THE VERTICAL DISTRIBUTION OF THE DIFFUSE ATTENUATION COEFFICIENT

A significant aspect of formulating a light-photosynthesis model in Case II waters lies in the definition of an adequate formulation of the vertical profiles of the available biomass and the diffuse attenuation of light available for photosynthesis. Approximately 500 profiles of CTD, beam attenuation coefficient and PAR investigated from 16 cruises in the Yellow Sea and the East China Sea, as well as profiles of fluorescence calibrated with discrete chlorophyll measurements. The euphotic depth, mixed layer depth, and critical depth are calculated to highlight the specific characteristics of this semi-enclosed sea. The fluorescence profiles were parameterized to characterize the vertical distribution of the biomass profile using a modified Gaussian formulation. Subsequently the biomass profile is used to calculate the diffuse attenuation profile for Eo(PAR) that would be expected in a Case I situation. This is then subtracted from measured K(PAR) to obtain DK(PAR) resulting from the non phytoplanktonic components. A general parameterization of this profile is formulated and implemented in a prototype Primary Production (PP) model for this region. Test satellite products are generated and compared to standard PP products.

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Aquatic Sciences Meeting, Albuquerque 2001

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