This study constitutes a part of the Ph.D. thesis of Swati Gehlot submitted at the University of Hamburg, Germany, in 2010. The International Max Planck Research School–Earth System Modeling (IMPRS-ESM) at the Max Planck Institute for Meteorology, Hamburg, and the German Research Foundation (Deutsche Forschungsgemeinschaft, DFG, in an Emmy Noether Grant) provided the financial support for this work. The authors thank Ákos Horváth for useful suggestions on the manuscript and Petri Räisänen for his providing the subcolumn sampler code used in the ISCCP simulator. Computing time was provided by the German Climate Computing Center (DKRZ).
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