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Intercomparison of regional-scale hydrological models and climate change impacts projected for 12 large river basins worldwide - A synthesis

Urheber*innen
/persons/resource/Valentina.Krysanova

Krysanova,  Valentina
Potsdam Institute for Climate Impact Research;

/persons/resource/tobias.vetter

Vetter,  Tobias
Potsdam Institute for Climate Impact Research;

Eisner,  S.
External Organizations;

/persons/resource/shaochun.huang

Huang,  Shaochun
Potsdam Institute for Climate Impact Research;

Pechlivanidis,  I.
External Organizations;

Strauch,  M.
External Organizations;

Gelfan,  A.
External Organizations;

Kumar,  R.
External Organizations;

/persons/resource/valentin.aich

Aich,  Valentin
Potsdam Institute for Climate Impact Research;

Arheimer,  B.
External Organizations;

Chamorro,  A.
External Organizations;

Griensven,  A. van
External Organizations;

Kundu,  D.
External Organizations;

/persons/resource/anastasia.lobanova

Lobanova,  Anastasia
Potsdam Institute for Climate Impact Research;

Mishra,  V.
External Organizations;

Plötner,  S.
External Organizations;

/persons/resource/julia.reinhardt

Reinhardt,  Julia
Potsdam Institute for Climate Impact Research;

Seidou,  O.
External Organizations;

Wang,  X.
External Organizations;

/persons/resource/michael.wortmann

Wortmann,  Michel
Potsdam Institute for Climate Impact Research;

Zeng,  X.
External Organizations;

/persons/resource/Fred.Hattermann

Hattermann,  Fred Fokko
Potsdam Institute for Climate Impact Research;

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7712oa.pdf
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Zitation

Krysanova, V., Vetter, T., Eisner, S., Huang, S., Pechlivanidis, I., Strauch, M., Gelfan, A., Kumar, R., Aich, V., Arheimer, B., Chamorro, A., Griensven, A. v., Kundu, D., Lobanova, A., Mishra, V., Plötner, S., Reinhardt, J., Seidou, O., Wang, X., Wortmann, M., Zeng, X., Hattermann, F. F. (2017): Intercomparison of regional-scale hydrological models and climate change impacts projected for 12 large river basins worldwide - A synthesis. - Environmental Research Letters, 12, 10, 105002.
https://doi.org/10.1088/1748-9326/aa8359


Zitierlink: https://publications.pik-potsdam.de/pubman/item/item_21806
Zusammenfassung
An intercomparison of climate change impacts projected by nine regional-scale hydrological models for 12 large river basins on all continents was performed, and sources of uncertainty were quantified in the framework of the ISIMIP project. The models ECOMAG, HBV, HYMOD, HYPE, mHM, SWAT, SWIM, VIC and WaterGAP3 were applied in the following basins: Rhine and Tagus in Europe, Niger and Blue Nile in Africa, Ganges, Lena, Upper Yellow and Upper Yangtze in Asia, Upper Mississippi, MacKenzie and Upper Amazon in America, and Darling in Australia. The model calibration and validation was done using WATCH climate data for the period 1971–2000. The results, evaluated with 14 criteria, are mostly satisfactory, except for the low flow. Climate change impacts were analyzed using projections from five global climate models under four representative concentration pathways. Trends in the period 2070–2099 in relation to the reference period 1975–2004 were evaluated for three variables: the long-term mean annual flow and high and low flow percentiles Q 10 and Q 90, as well as for flows in three months high- and low-flow periods denoted as HF and LF. For three river basins: the Lena, MacKenzie and Tagus strong trends in all five variables were found (except for Q 10 in the MacKenzie); trends with moderate certainty for three to five variables were confirmed for the Rhine, Ganges and Upper Mississippi; and increases in HF and LF were found for the Upper Amazon, Upper Yangtze and Upper Yellow. The analysis of projected streamflow seasonality demonstrated increasing streamflow volumes during the high-flow period in four basins influenced by monsoonal precipitation (Ganges, Upper Amazon, Upper Yangtze and Upper Yellow), an amplification of the snowmelt flood peaks in the Lena and MacKenzie, and a substantial decrease of discharge in the Tagus (all months). The overall average fractions of uncertainty for the annual mean flow projections in the multi-model ensemble applied for all basins were 57% for GCMs, 27% for RCPs, and 16% for hydrological models.