An Assessment of Upper Tropospheric and Lower Stratospheric Moisture Simulations in Analysis and Reanalysis Models Using 10-Year Aura MLS Observations

Thursday, 18 December 2014
Jonathan H. Jiang, NASA Jet Propulsion Laboratory, Pasadena, CA, United States and Hui Su, Jet Propulsion Lab, Pasadena, CA, United States
We use 10-year global water vapor maxing ratio (H2O) measurements from Microwave LimeSounder (MLS) on Aura satellite to evaluate the performance of three analysis/reanalysis models: Goddard Earth Observation System data assimilation system, version 5 (GEOS5); Modern-Era Retrospective Analysis for research and Applications (MERRA); and European Centre for Medium-Range Weather Forecasts (ECMWF). We focus on H2O variations on both seasonal and decadal time scales. Vertical and horizontal speeds of H2O transport are estimated from the pressure-time and latitude-time series analyses. The differences between the MLS observations and analysis/reanalysis models are quantified.