20th Conference on Climate Variability and Change
22nd Conference on Hydrology

J6.4

A preliminary study of global water and energy cycles in a NASA reanalysis system

Junye Chen, Univ. of Maryland/ESSIC & NASA/GSFC/GMAO, Greenbelt, MD; and M. G. Bosilovich

Global water and energy cycles are two tightly related and critical components of the Earth climate system. In current assimilation systems, model output is only locally constrained by available observations, which are always uncompleted and contaminated by random error and biases. Thus the global water and energy balances are good yet high standard indicators of the performance of an assimilation system. In this study, we use several global observed datasets to evaluate the assimilation results from the validation experiments for the Modern Era Retrospective-analysis for Research and Applications (MERRA) based on NASA GEOS-5 data assimilation system. The observed datasets include CERES ERBE-like TOA radiation fluxes, GPCP precipitation, CMAP precipitation etc. Furthermore, based on comparison with other assimilation systems, deeper understanding about the effect of the interaction between model and analyzed data on the water and energy cycles will be given.

extended abstract  Extended Abstract (828K)

wrf recording  Recorded presentation

Joint Session 6, Advances in Atmospheric Reanalysis
Wednesday, 23 January 2008, 4:00 PM-5:30 PM, 224

Previous paper  Next paper

Browse or search entire meeting

AMS Home Page