In reality there are several factors that produce the current climate change. For this purpose we are analyzing existing climate and paleoclimate data, analyzing outputs of general circulation models and creating new approximations to for the various physical processes involved in climate system. To bring together experts holding different views on the current global warming and to faciliate an intense discussion of the related science, we are organizing The First International Conference on Global Warming and The Next Ice Age , sponsorod by the American Meteorological Society and by the Canadian Meteorological and Oceanographic Society, to take place in Halifax in August 2001. Aerosols also affect biogeochemical cycles and human health. Main types of natural aerosols are sea salt, soil dust, aerosols produced by volcanos and forest fires, and biogenic sulfates and organic aerosols.
Atmospheric aerosols can significantly modify the predicted warming of greenhouse gases.
Our work also include the parameterization of aerosol optical properties as functions of relative humidity for use in climate models. Clouds Clouds reflect a considerable portion of incoming solar radiation back to space and they modify outgoing infrared radiation. The interplay between atmospheric radiation and dynamics, cloud microphysics, aerosols, and thermodynamics is not fully understood. Our current research concerns the effect of atmospheric aerosols on cloudiness and cloud optical properties, and improvement of cloud parameterizations in radiation codes used in climate models. We are also investigating the effect of black carbon on the absorption of solar radiation by clouds.