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| Titel |
Use of agricultural statistics to verify the interannual variability in land surface models: a case study over France with ISBA-A-gs |
| VerfasserIn |
J.-C. Calvet, S. Lafont, E. Cloppet, F. Souverain, V. Badeau, C. Bas |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1991-959X
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| Digitales Dokument |
URL |
| Erschienen |
In: Geoscientific Model Development ; 5, no. 1 ; Nr. 5, no. 1 (2012-01-11), S.37-54 |
| Datensatznummer |
250002291
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| Publikation (Nr.) |
 copernicus.org/gmd-5-37-2012.pdf |
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| Zusammenfassung |
| In order to verify the interannual variability of the above-ground biomass of herbaceous
vegetation simulated by the ISBA-A-gs land surface model, within the SURFEX modelling platform,
French agricultural statistics for C3 crops and grasslands were compared with the simulations for
the 1994–2008 period. While excellent correlations are obtained for grasslands, representing the
interannual variability of crops is more difficult. It is shown that, the Maximum Available soil
Water Capacity (MaxAWC) has a large influence on the correlation between the model and the
agricultural statistics. In particular, high values of MaxAWC tend to reduce the impact of the
climate interannual variability on the simulated biomass. Also, high values of MaxAWC allow the
simulation of a negative trend in biomass production, in relation to a marked warming trend, of
about 0.12 Kyr−1 on average, affecting the daily maximum air temperature during the growing
period (April–June). This trend is particularly acute in Northern France. The estimates of
MaxAWC for C3 crops and grasslands, currently used in SURFEX, are about 129 mm and do not vary
much. Therefore, more accurate grid-cell values of this parameter are needed. |
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