Influence of Sea Surface Temperature, Tropopheric Humidity and Lapse Rate on the Annual Cycle of Clear-Sky Greenhouse Effect

Over the past decades, spaceborne sensors have observed surface temperatures, atmosphere water vapor, cloud coverages, radiation budget, and other parameters related to atmospheric greenhouse warming. Recently, spacebased scatterometer, altimeter, and precipitation radar have added information on oceanic feedback to greenhouse warming. The nineties have also witnessed unusual El Nino and Southern Oscillation (ENSO) events. Over the ocean, the global mean temperature in 1997 and 1998 was among he highest in the century, but the global precipitation was among the lowest. The relationship between spacebased hydrologic parameters and greenhouse effects, in seasonal scales and during ENSO episodes, have been examined and the results will be presented.