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| Titel |
Impact of precipitation and land biophysical variables on the simulated discharge of European and Mediterranean rivers |
| VerfasserIn |
C. Szczypta, B. Decharme, D. Carrer, J.-C. Calvet, S. Lafont, S. Somot, S. Faroux, E. Martin |
| 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. 9 ; Nr. 16, no. 9 (2012-09-20), S.3351-3370 |
| Datensatznummer |
250013475
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| Publikation (Nr.) |
 copernicus.org/hess-16-3351-2012.pdf |
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| Zusammenfassung |
| This study investigates the impact on river discharge simulations of errors
in the precipitation forcing, together with changes in the representation of
vegetation variables and of plant transpiration. The most recent European
Centre for Medium-Range Weather Forecasts reanalysis (ERA-Interim) is used
to drive the Interactions between Soil, Biosphere, and Atmosphere–Total
Runoff Integrating Pathways (ISBA-TRIP) continental hydrological system over
Europe and the Mediterranean basin over the 1991–2008 period. As
ERA-Interim tends to underestimate precipitation, a number of precipitation
corrections are proposed. In particular, the monthly Global Precipitation
Climatology Centre (GPCC) precipitation product is used to bias-correct the
3-hourly ERA-Interim estimates. This correction markedly improves the match
between the ISBA-TRIP simulations and the river discharge observations from
the Global Runoff Data Centre (GRDC), at 150 gauging stations. The impact on
TRIP river discharge simulations of various representations of the
evapotranspiration in the ISBA land surface model is investigated as well:
ISBA is used together with its upgraded carbon flux version (ISBA-A-gs). The
latter is either driven by the satellite-derived climatology of the Leaf
Area Index (LAI) used by ISBA, or performs prognostic LAI simulations. The
ISBA-A-gs model, with or without dynamically simulated LAI, allows a better
representation of river discharge at low water levels. On the other hand,
ISBA-A-gs does not perform as well as the original ISBA model at springtime. |
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