4:00 PM - 4:15 PM
[ACG46-15] Ice crystal number concentration estimates from lidar-radar satellite remote sensing
Keywords:ice clouds, satellite, retrievals, model evaluation, aerosol-cloud interactions
As a first step to fill this gap, this study presents results from a preliminary product of the ICNC obtained from combined CALIPSO/CloudSat observations. The operational liDAR-raDAR (DARDAR) product is used as a basis for these estimations. Climatologies corresponding to the overall A-Train period have been analyzed and show an overall agreement with theoretical expectations. Furthermore, the accuracy of these ICNC retrievals has been rigorously estimated through comparisons with in situ measurements from recent airborne campaigns. Good agreements are found for ice clouds colder than about -40°C, where homogeneous nucleation processes dominate. Limitations have nevertheless been observed due to misrepresentations of the amount of small ice particules (i.e., sizes smaller than 100 microns) in existing parameterizations of the particule size distribution. Subsequently, preliminary applications of this novel dataset to evaluated global climate model predictions and observe aerosol-cloud interactions have been made and will be presented.