When one considers that roughly 2/3 of the warming predicted in global climate models (GCMs) is due to the response from water vapor and clouds to the initial GHG forcing, it is not difficult to understand why cloud physics is important to climate change research. Regarding warm clouds, a unique instrument developed at DRI quantifies the relationships between cloud condensation nuclei, cloud updraft and supersaturation, and the cloud droplet size distribution, helping to quantify cloud-aerosol interactions and resultant cloud optical effects. For cold clouds, data streams from improved microphysical measurements (supplied from collaborators outside of DAS) are being analyzed at DAS to better characterize the ice particle effective sizes, De, and mass-weighted ice fall speeds, Vm.
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