A technique for global monitoring of net solar irradiance at the ocean surface. Part I: model

Abstract

An algorithm based on radiative transfer theory is presented to generate the first accurate, long-term (84-month) climatology of net surface solar irradiance over the global oceans from Nimbus-7 earth radiation budget (ERB) wide-field-of-view planetary-albedo data. It is shown that the effects of clouds and clear-atmosphere constituents can be decoupled on a monthly time scale, which makes it possible to directly apply the algorithm with monthly averages of ERB planetary-albedo data. Compared theoretically with the algorithm of Gautier et al., the present algorithm yields higher solar irradiance values in clear and thin cloud conditions and lower values in thick cloud conditions. The agreement, however, remains within 10-20 W m-2. -from Authors