Natural Aerosols in the Global Atmosphere
نویسندگان
چکیده
A global three-dimensional chemical transport model (CTM) is used to model the yearly cycle of sea salt.Sea salt particles are produced by wind acting on the sea surface, and they are removed by wet and dry deposition.In this study, forecast meteorological data are taken from the ECMWF. The modeled concentrations are comparedto measured concentrations at sea level, and both absolute values and monthly variations compare well withmeasurements. Radiation calculations have been performed using the same meteorological input data as theCTM calculations. The global, yearly average burden of sea salt is found to be 12 mg m22. This is within therange of earlier estimates that vary between 11 and 22 mg m22. The radiative impact of sea salt is calculatedto be 21.1 W m22. The total, yearly flux of sea salt is estimated to be 6500 Tg yr21.
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