A CODE TO COMPUTE THE DIRECT SOLAR RADIATIVE FORCING: APPLICATION TO ANTHROPOGENIC AEROSOLS DURING THE ESCOMPTE EXPERIMENT

摘要

A fast yet accurate radiative transfer code (GAME) has been developed to calculate solar fluxes with absorption, scattering as well as their interactions. Using this code, a methodology has been defined to characterize the aerosol properties and to estimate the local direct aerosol forcing. Data from the ESCOMPTE experiment, which took place in the vicinity of Marseille (France) during summer 2001, provide the possibility to realize a local study during pollution events. Major results are: (1) a retrieval of the microphysical and optical properties of POM for one of the first time; (2) a retrieval of microphysical and optical properties for soot particles different of those usually used; (3) a large impact of anthropogenic aerosols (BC, Sulphate and POM) on the daily direct forcing.