Inelastic scattering in ocean water and its impact on trace gas retrievals from satellite data

摘要: Abstract. Over clear ocean waters, photons scattered within the water body contribute significantly to upwelling flux. In addition elastic scattering, inelastic Vibrational Raman Scattering (VRS) by liquid is also playing a role and can have strong impact on spectral distribution of outgoing radiance. Under clear-sky conditions, VRS has an influence trace gas retrievals from space-borne measurements backscattered radiance such as e.g. GOME (Global Ozone Monitoring Experiment). The effect particularly important for geo-locations with small solar zenith angles over waters low chlorophyll concentration. this study, simple reflectance model (Sathyendranath Platt, 1998) accounting been incorporated into radiative transfer model. validated comparison swimming-pool experiment dedicated detect scattering radiation selected data sets GOME. comparisons show good agreement between experimental highlight VRS. To evaluate retrieval, sensitivity study was performed synthetic data. If neglected in analysis, errors more than 30% are introduced slant column (SC) BrO scenarios. Exemplarily DOAS real including excluding compensation led comparable results but somewhat smaller differences two analyses. work suggest, that atmospheric species nadir viewing instruments take account concentrations, correction term enough reduce acceptable level.