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| Titel |
Turbulent flux modelling with a simple 2-layer soil model and extrapolated surface temperature applied at Nam Co Lake basin on the Tibetan Plateau |
| VerfasserIn |
T. Gerken, W. Babel, A. Hoffmann, T. Biermann, M. Herzog, A. D. Friend, M. Li, Y. Ma, T. Foken, H.-F. Graf |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 16, no. 4 ; Nr. 16, no. 4 (2012-04-03), S.1095-1110 |
| Datensatznummer |
250013252
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| Publikation (Nr.) |
 copernicus.org/hess-16-1095-2012.pdf |
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| Zusammenfassung |
| This paper introduces a surface model with two soil-layers for use in a high-resolution circulation model
that has been modified with an extrapolated surface temperature, to be used for the calculation of
turbulent fluxes. A quadratic temperature profile based on the layer mean and base temperature is assumed in each
layer and extended to the surface. The model is tested at two sites on the Tibetan Plateau near Nam Co Lake
during four days during the 2009 Monsoon season. In comparison to a two-layer model without explicit
surface temperature estimate, there is a greatly reduced delay in diurnal flux cycles and the modelled surface temperature
is much closer to observations. Comparison with a SVAT model and eddy covariance measurements shows an
overall reasonable model performance based on RMSD and cross correlation comparisons between the modified
and original model. A potential limitation of the model is the need for careful initialisation of the initial
soil temperature profile, that requires field measurements. We show that the modified model is
capable of reproducing fluxes of similar magnitudes and dynamics when compared to
more complex methods chosen as a reference. |
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