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| Titel |
Impact of the use of a CO2 responsive land surface model in simulating the effect of climate change on the hydrology of French Mediterranean basins |
| VerfasserIn |
S. Queguiner, E. Martin, S. Lafont, J.-C. Calvet, S. Faroux, P. Quintana-Seguí |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 11, no. 10 ; Nr. 11, no. 10 (2011-10-24), S.2803-2816 |
| Datensatznummer |
250009734
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| Publikation (Nr.) |
 copernicus.org/nhess-11-2803-2011.pdf |
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| Zusammenfassung |
| In order to evaluate the uncertainty associated with the impact model in
climate change studies, a CO2 responsive version of the land surface
model ISBA (ISBA-A-gs) is compared with its standard version in a climate
impact assessment study. The study is performed over the French
Mediterranean basin using the Safran-Isba-Modcou chain. A downscaled A2
regional climate scenario is used to force both versions of ISBA, and the
results of the two land surface models are compared for the present climate
and for that at the end of the century. Reasonable agreement is found
between models and with discharge observations. However, ISBA-A-gs has a
lower mean evapotranspiration and a higher discharge than ISBA-Standard.
Results for the impact of climate change are coherent on a yearly basis for
evapotranspiration, total runoff, and discharge. However, the two versions of
ISBA present contrasting seasonal variations. ISBA-A-gs develops a different
vegetation cycle. The growth of the vegetation begins earlier and reaches a
slightly lower maximum than in the present climate. This maximum is followed
by a rapid decrease in summertime. In consequence, the springtime
evapotranspiration is significantly increased when compared to
ISBA-Standard, while the autumn evapotranspiration is lower. On average,
discharge changes are more significant at the regional scale with ISBA-A-gs. |
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