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| Titel |
Multi-objective calibration of the land surface scheme TERRA/LM using LITFASS-2003 data |
| VerfasserIn |
K.-P. Johnsen, H.-T. Mengelkamp, S. Huneke |
| 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 ; 9, no. 6 ; Nr. 9, no. 6 (2005-12-31), S.586-596 |
| Datensatznummer |
250007139
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| Publikation (Nr.) |
 copernicus.org/hess-9-586-2005.pdf |
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| Zusammenfassung |
| The turbulent sensible and latent heat fluxes simulated in the operational
weather forecast model LM have been checked with data from the field
experiment LITFASS 2003 (Lindenberg Inhomogeneous Terrain - Fluxes between
Atmosphere and Surface: a Long-term Study) using both single site
measurements and grid box aggregated fluxes. SCE-UA (single objective) and
MOSCEM-UA (multi-objective) approaches were applied to calibrate the
land-surface scheme TERRA/LM for 11 single sites and for the aggregated
fluxes. A large variation is seen among the parameter sets found by
calibration but no typical classification according to vegetation type is
obvious. This is attributed to the calibrated parameter sets correcting for
model deficiencies and data errors rather than describing the physical
characteristics of the measurement site. The measured fluxes were combined
into a time series of aggregated fluxes by the tile method. Calibration of
TERRA/LM with respect to the averaged fluxes resulted in a range of parameter
sets which all simulated the area-averaged fluxes in much better agreement
with the observed fluxes than the standard parameter set of the operational
model. A modified Nash-Sutcliffe measure as a coincidence criterion fell from
0.3 to a range between 0.15 and 0.28 for the latent heat flux and from 0.43
to between 0.26 and 0.36 for the sensible heat flux when the calibrated
parameter sets were used instead of the standard parameters. |
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