Friday, 17 May 2002: 2:10 PM
Progress to Derive Improved Surface Radiation Budgets for the Global Energy and Water Cycle Experiment (GEWEX) Continental-Scale International Project and the GEWEX Americas Prediction Project (GCIP/GAPP)
Surface radiation budget parameters are being produced operationally in real time at NOAA/NESDIS from GOES observations at hourly time scale, at 0.5 degree spatial resolution, and are delivered to the GCIP/GAPP community and to the public, in real time. The current product is used extensively in a wide range of applications, such as validation of numerical weather prediction models, land data assimilation activities (LDAS), hydrological modeling, net primary productivity assessment, snow melt estimation, solar energy applications, and air quality modeling. Extensive product evaluation against ground observations and feedbacks from user groups have helped to identify areas where improvements are needed. While the product was shown to be of satisfactory quality at both daily and hourly time scales during average snow-free conditions, improvements are needed under situations characterized by sub-pixel clouds, clouds over snow and in respect to calibration of satellite sensors. Steps have been taken to address above issues. Due to developments in related fields, it also became timely to upgrade currently used surface type classifications and aerosol information in the radiative transfer scheme. In this presentation we will review the current status of the GCIP/GAPP surface radiation product and report on progress made towards improving it.
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