NDLI: 0 1992, by the American Society of Limnology and Oceanography, Inc Model of the mean cosine of underwater radiance and estimation of underwater scalar irradiance

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0 1992, by the American Society of Limnology and Oceanography, Inc Model of the mean cosine of underwater radiance and estimation of underwater scalar irradiance

Content Provider	CiteSeerX
Author	Bannister, T. T.
Abstract	An empirical model has been found with which to calculate depth profiles of the mean cosine of a component of radiance in homogeneous water under a flat surface. Model inputs are the refraction angle w ’ and the subsurface downwelling irradiance E, due to the entering radiance component. Other inputs are the absorption and scattering coefficients, a and b, and the angular scattering function (here Petzold’s functions for San Diego Harbor or “Tongue of the ocean ” Atlantic waters). The model applies to refraction angles up to 411 ” and b: a ratios up to 20. Model profiles of the mean cosine match Monte Carlo profiles to 3:O.Ol. From mean cosine profiles, scalar irradiance profiles are calculable; down to the 1 % light level, model and Monte Carlo irradiances agree within 3 ~ 10%. The time to compute an irradiance profile with the model is- 1O-4 that of a Monte Carlo calculation. The starting point in modeling phyto-plankton photosynthesis and growth is eval-uation of the Chl-specific absorbed irradi-ante given by ((z, t) [Einst abs(mg Chl)- ’ d-l]
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Access Restriction	Open
Subject Keyword	Mg Chl Underwater Radiance Flat Surface San Diego Harbor Empirical Model Mean Cosine American Society Monte Carlo Calculation Scalar Irradiance Profile Radiance Component Angular Scattering Function Refraction Angle Einst Ab Light Level Ocean Atlantic Water Irradiance Profile Mean Cosine Profile Petzold Function Underwater Scalar Irradiance Phyto-plankton Photosynthesis Mean Cosine Match Monte Carlo Monte Carlo Irradiances Model Profile Model Input Homogeneous Water Inc Model Depth Profile
Content Type	Text

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