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Evaluation of ECMWF medium-range ensemble forecasts of precipitation for river basins

Ye, J., He, Y., Pappenberger, F., Cloke, H. L., Manful, D. Y. and Li, Z. (2014) Evaluation of ECMWF medium-range ensemble forecasts of precipitation for river basins. Quarterly Journal of the Royal Meteorological Society, 140 (682). pp. 1615-1628. ISSN 1477-870X

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To link to this item DOI: 10.1002/qj.2243

Abstract/Summary

Providing probabilistic forecasts using Ensemble Prediction Systems has become increasingly popular in both the meteorological and hydrological communities. Compared to conventional deterministic forecasts, probabilistic forecasts may provide more reliable forecasts of a few hours to a number of days ahead, and hence are regarded as better tools for taking uncertainties into consideration and hedging against weather risks. It is essential to evaluate performance of raw ensemble forecasts and their potential values in forecasting extreme hydro-meteorological events. This study evaluates ECMWF’s medium-range ensemble forecasts of precipitation over the period 2008/01/01-2012/09/30 on a selected mid-latitude large scale river basin, the Huai river basin (ca. 270,000 km2) in central-east China. The evaluation unit is sub-basin in order to consider forecast performance in a hydrologically relevant way. The study finds that forecast performance varies with sub-basin properties, between flooding and non-flooding seasons, and with the forecast properties of aggregated time steps and lead times. Although the study does not evaluate any hydrological applications of the ensemble precipitation forecasts, its results have direct implications in hydrological forecasts should these ensemble precipitation forecasts be employed in hydrology.

Item Type:Article
Refereed:Yes
Divisions:Interdisciplinary centres and themes > Walker Institute
Faculty of Science > School of Archaeology, Geography and Environmental Science > Earth Systems Science
Faculty of Science > School of Archaeology, Geography and Environmental Science > Department of Geography and Environmental Science
ID Code:35076
Uncontrolled Keywords:ECMWF EPS;Huai;skill score;diurnal cycle
Publisher:Royal Meteorological Society

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