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Implementation of Noah land surface model advances in the National Centers for Environmental Prediction operational mesoscale Eta model
Environmental Modeling Center, National Centers for Environmental Prediction, Suitland, Maryland, USA
Environmental Modeling Center, National Centers for Environmental Prediction, Suitland, Maryland, USA
Environmental Modeling Center, National Centers for Environmental Prediction, Suitland, Maryland, USA
Environmental Modeling Center, National Centers for Environmental Prediction, Suitland, Maryland, USA
Environmental Modeling Center, National Centers for Environmental Prediction, Suitland, Maryland, USA
Office of Hydrologic Development, National Weather Service, Silver Spring, Maryland, USA
Air Force Weather Agency, Offutt Air Force Base, Nebraska, USA
Office of Research and Applications, National Environmental Satellite Data and Information Service, Suitland, Maryland, USA
We present the impact tests that preceded the most recent operational upgrades to the land surface model used in the National Centers for Environmental Prediction (NCEP) mesoscale Eta model, whose operational domain includes North America. These improvements consist of changes to the “Noah” land surface model (LSM) physics, most notable in the area of cold season processes. Results indicate improved performance in forecasting low-level temperature and humidity, with improvements to (or without affecting) the overall performance of the Eta model quantitative precipitation scores and upper air verification statistics. Remaining issues that directly affect the Noah LSM performance in the Eta model include physical parameterizations of radiation and clouds, which affect the amount of available energy at the surface, and stable boundary layer and surface layer processes, which affect surface turbulent heat fluxes and ultimately the surface energy budget.
Received 6 December 2002; accepted 6 October 2003; published 29 November 2003.
Citation: (2003), Implementation of Noah land surface model advances in the National Centers for Environmental Prediction operational mesoscale Eta model, J. Geophys. Res., 108(D22), 8851, doi:10.1029/2002JD003296.
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