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Evaluating the Utah Energy Balance's (Ueb) Snow Model in the Noah Land-surface Model : Volume 10, Issue 11 (07/11/2013)

By Sultana, R.

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Book Id: WPLBN0004011569
Format Type: PDF Article :
File Size: Pages 44
Reproduction Date: 2015

Title: Evaluating the Utah Energy Balance's (Ueb) Snow Model in the Noah Land-surface Model : Volume 10, Issue 11 (07/11/2013)  
Author: Sultana, R.
Volume: Vol. 10, Issue 11
Language: English
Subject: Science, Hydrology, Earth
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Hsu, K., Sorooshian, S., Li, J., & Sultana, R. (2013). Evaluating the Utah Energy Balance's (Ueb) Snow Model in the Noah Land-surface Model : Volume 10, Issue 11 (07/11/2013). Retrieved from

Description: California State University, Long Beach, CA, USA. Noah (version 2.7.1), the community land-surface model (LSM) of NCEP-NCAR, which is widely used to describe the land-surface processes either in stand-alone or in coupled land–atmospheric model systems, is recognized because snow–water equivalent (SWE) can be underestimated. Noah's SWE bias can be attributed to its simple snow sub-model, which does not effectively describe the physical processes during snow accumulation and melt period. To improve SWE simulation in the Noah LSM, the Utah Energy Balance (UEB) snow model is implemented in Noah to test alternate snow-surface temperature and snow-melt outflow schemes. Snow surface temperature was estimated using force–restore method and snow melt event is regulated by accounting for the internal energy of the snowpack. The modified Noah SWE is compared with the SWE observed at California's NRCS SNOTEL stations for seven water years: 2002–2008, while the model snow-surface temperature is verified with observed surface-temperature data at an observation site in Utah. The experiments show that modification in Noah's snow process substantially reduced SWE estimation bias while keeping the simplicity of the Noah LSM. The results suggest that the model did not benefit from the alternate temperature representation but primary improvement can be attributed to the substituted snow melt process.

Evaluating the Utah Energy Balance's (UEB) snow model in the Noah Land-Surface Model

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