1. HyCODEJan 2002 EcoLight: Irradiance calculations for coupled ecosystem models Curtis D. Mobley and Lydia K. Sundman Sequoia Scientific, Inc. Redmond, WA In collaboration with Paul Bissett Florida Environmental Research Institute Tampa, FL Work supported by U.S. Navy ONR HyCODE Program

2. HyCODEJan 2002 Goals develop an extremely fast version of Hydrolight (EcoLight) for use in coupled physical-biological- optical ecosystem models [Status: done] incorporate EcoLight into EcoSim as a called subroutine [Status: in final debugging] quantify the improvements in ecosystem forecasts resulting from improved irradiance calculations [Status: this year’s work]

3. The Big Picture EcoLight subroutine solves the RTE Regional Ocean Modeling System (ROMS) Ecosystem Model EcoSim Preprocessor: converts EcoSim output to total IOPs component concentrations total IOP’s, etc. E o, E d, R rs light HyCODEJan 2002

4. HyCODEJan 2002 Hydrolight vs EcoLight Case 2 water (water + phytos + CDOM + minerals) Hydrolight (red): 880 sec; EcoLight (green) 2.8 sec (EcoLight details are available in EcoLight 3.0 Notes)

5. H, Petzold pf Hyper-TSRB OCP H, measured pf H, FF pf HyCODEJan 2002 Related Work Showed that the Fournier-Forand phase function as determined from b b /b(z,  ) is a good proxy for measured phase functions. Illustrated with LEO-15 2000 data (Mobley, Sundman and Boss, Appl. Opt. (in press)