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- W4313541728 abstract "Abstract Recent advances in global hydrological modeling yield many global runoff data sets that are extensively used in global hydrological analyses. Here, we provide a comprehensive evaluation of simulated runoff from 21 global models, including 12 climate models from CMIP6, six global hydrological models from the Inter‐Sectoral Impact Model Inter‐Comparison Project (ISMIP2a) and three land surface models from the Global Land Data Assimilation System (GLDAS), against observed streamflow in 840 unimpaired catchments globally. Our results show that (a) no model performs consistently better in estimating runoff from all aspects, and all models tend to perform better in more humid regions and non‐cold areas; (b) the interannual runoff variability is well represented in ISIMIP2a and GLDAS models, and no model performs satisfactorily in capturing the annual runoff trend; (c) the runoff intra‐annual cycle is reasonably captured by all models yet an overestimation of intra‐annual variability and an early bias in peak flow timing are commonly found; and (d) model uncertainty leads to a larger uncertainty in runoff estimates than that induced by forcing uncertainty in ISIMIP2a, and model uncertainty in GLDAS is larger than that in ISIMIP2a. Finally, we confirm that the multi‐model ensemble is an effective way to reduce uncertainty in individual models except for CMIP6 regarding mean annual magnitude and annual runoff trend. Overall, our findings suggest that assessments/projections of runoff changes based on these global outputs contain great uncertainties and should be interpreted with caution, and call for more advanced, observation‐guided ensemble techniques for better large‐scale hydrological applications." @default.
- W4313541728 created "2023-01-06" @default.
- W4313541728 creator A5071446011 @default.
- W4313541728 creator A5077306793 @default.
- W4313541728 creator A5080486186 @default.
- W4313541728 creator A5089925859 @default.
- W4313541728 date "2022-12-28" @default.
- W4313541728 modified "2023-10-16" @default.
- W4313541728 title "Global Evaluation of Runoff Simulation From Climate, Hydrological and Land Surface Models" @default.
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