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Improving snow proc...
Improving snow process modeling with satellite-based estimation of near-surface-air-temperature lapse rate
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Wang, L. (author)
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Sun, L. (author)
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Shrestha, M. (author)
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Li, X. (author)
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Liu, W. (author)
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Zhou, J. (author)
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Yang, K. (author)
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Lu, H. (author)
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- Chen, Deliang, 1961 (author)
- Gothenburg University,Göteborgs universitet,Institutionen för geovetenskaper,Department of Earth Sciences
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(creator_code:org_t)
- 2016
- 2016
- English.
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In: Journal of Geophysical Research - Atmospheres. - 0148-0227 .- 2156-2202. ; 121:20
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Abstract
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- In distributed hydrological modeling, surface air temperature (Tair) is of great importance in simulating cold region processes, while the near-surface-air-temperature lapse rate (NLR) is crucial to prepare Tair (when interpolating Tair from site observations to model grids). In this study, a distributed biosphere hydrological model with improved snow physics (WEB-DHM-S) was rigorously evaluated in a typical cold, large river basin (e.g., the upper Yellow River basin), given a mean monthly NLRs. Based on the validated model, we have examined the influence of the NLR on the simulated snow processes and streamflows. We found that the NLR has a large effect on the simulated streamflows, with a maximum difference of greater than 24% among the various scenarios for NLRs considered. To supplement the insufficient number of monitoring sites for near-surface-air-temperature at developing/undeveloped mountain regions, the nighttime Moderate Resolution Imaging Spectroradiometer land surface temperature is used as an alternative to derive the approximate NLR at a finer spatial scale (e.g., at different elevation bands, different land covers, different aspects, and different snow conditions). Using satellite-based estimation of NLR, the modeling of snow processes has been greatly refined. Results show that both the determination of rainfall/snowfall and the snowpack process were significantly improved, contributing to a reduced summer evapotranspiration and thus an improved streamflow simulation. ©2016. American Geophysical Union. All Rights Reserved.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Geofysik (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Geophysics (hsv//eng)
Keyword
- distributed hydrological model
- lapse rate
- MODIS land surface temperature
- snow process
- water and energy cycle
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Wang, L.
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Sun, L.
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Shrestha, M.
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Li, X.
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Liu, W.
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Zhou, J.
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show more...
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Yang, K.
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Lu, H.
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Chen, Deliang, 1 ...
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Earth and Relate ...
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and Geophysics
- Articles in the publication
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Journal of Geoph ...
- By the university
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University of Gothenburg