 |
| Titel |
Influence of thermodynamic soil and vegetation parameterizations on the simulation of soil temperature states and surface fluxes by the Noah LSM over a Tibetan plateau site |
| VerfasserIn |
R. Velde, Z. Su, M. Ek, M. Rodell, Y. Ma |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1027-5606
|
| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 13, no. 6 ; Nr. 13, no. 6 (2009-06-12), S.759-777 |
| Datensatznummer |
250011895
|
| Publikation (Nr.) |
 copernicus.org/hess-13-759-2009.pdf |
|
|
|
|
|
| Zusammenfassung |
| In this paper, we investigate the ability of the Noah
Land Surface Model (LSM) to simulate temperature states in the soil profile
and surface fluxes measured during a 7-day dry period at a
micrometeorological station on the Tibetan Plateau. Adjustments in soil and
vegetation parameterizations required to ameliorate the Noah simulation on
these two aspects are presented, which include: (1) differentiating the soil
thermal properties of top- and subsoils, (2) investigation of the different
numerical soil discretizations and (3) calibration of the parameters utilized
to describe the transpiration dynamics of the Plateau vegetation. Through
the adjustments in the parameterization of the soil thermal properties (STP)
simulation of the soil heat transfer is improved, which results in a
reduction of Root Mean Squared Differences (RMSD's) by 14%, 18% and
49% between measured and simulated skin, 5-cm and 25-cm soil
temperatures, respectively. Further, decreasing the minimum stomatal
resistance (Rc,min) and the optimum
temperature for transpiration (Topt) of the
vegetation parameterization reduces RMSD's between measured and simulated
energy balance components by 30%, 20% and 5% for the sensible,
latent and soil heat flux, respectively. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|