Middle Ultraviolet Irradiance at the Ocean Surface: Measurements and Models
Measurements of the downward spectral middle ultraviolet (MUV, 280–380 nm) irradiance E(O+,λθ) have been made just above the ocean surface in the central equatorial Pacific. These data were obtained for sun zenith angles in the range 12° to 70°. Analytic models have been fit to these data. The data and the models, their use and their limitations, will be summarized here.Most of this work including the data (Smith and Baker, 1980; hereafter referred to as SB) and the model(Baker et al. 1980; hereafter referred to as BSG) has been explored in detail in previously published works.
In order to work with analytic calculations dealing with irradiance underwater, it is necessary to be able to calculate the spectral irradiance incident on the surface in various ocean locations. For this purpose, E(0+,λ,θ) has been modeled as a function of wavelength, solar zenith angle, ozone thickness, aerosol thickness, and surface albedo.
KeywordsZenith Angle Ocean Surface Solar Irradiance Surface Albedo Solar Zenith Angle
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