The GOES I–M Imagers: New Tools for Studying Microphysical Properties of Boundary Layer Stratiform Clouds
Abstract This study reviews the capability of the advanced imagers on Geostationary Operational Environmental Satellites (GOES) I–M to provide quantitative information about bulk microphysical properties of low–level stratiform clouds, namely, cloud liquid water path (LWP) and droplet effective radius (re). Previous studies show that accurate estimates of cloud LWP from GOES imagers are possible, as evaluated from both ground–based and spaceborne passive microwave measurements, provided care is taken in vicarious calibration of the visible channel. GOES estimates of re have yet to be validated. However, the re versus LWP relationship derived from GOES and Special Sensor Microwave/Imager data shows good agreement with theory. The unique high–temporal sampling of the imager allows for detailed study of daytime characteristics of cloud microphysical properties and, possibly, indirect aerosol effect. Microphysical information for drizzling marine stratocumuli was also obtained, which was confirmed by direct c...