Novel Parameterization of Ice Cloud Effective Diameter from Collocated CALIOP-IIR and CloudSat Retrievals

Abstract Satellite-based measurements of global ice cloud microphysical properties are sampled to develop a novel set physical parameterizations, relating layer temperature and effective diameter D e , that can be implemented for two separate applications: in numerical weather prediction models lidar-based radiative forcing studies. Ice optical (i.e., spectral scattering absorption) estimated based on the size habit mixture particles. Historically, has been parameterized from aircraft situ measurements. However, aircraft-based parameterizations opportunistic they only represent specific types clouds (e.g., convective anvil, tropopause-topped cirrus) regions which were and, some cases, limited fully resolving entire vertical layer. Breaking away parameterization paradigm, this study is first its kind attempt as function temperature, water content (IWC), lidar-derived extinction satellite-based oceanic clouds. Data both active passive remote sensing sensors NASA’s A-Train satellites, CloudSat CALIPSO collected guide development globally robust all one exclusively cirrus Significance Statement We derived unique crystal satellite an effort more robustly consistently forecasting climate energy balance Based our results, easily solved visible translucence. By knowing crystals, we then estimate absorption. In comparison with data reveal sizes much smaller, average, occurring relatively warm layers (>230 K), indicating many reflective than previously believed.