As part of the National Hydrological Services Transformation Initiative, Environment and Climate Change Canada (ECCC) designed and implemented the National Surface and River Prediction System (NSRPS) in order to provide surface and river flow analysis and forecast products across Canada. Within NSRPS, the Canadian Land Data Assimilation System (CaLDAS) produces snow analyses that are used to initialise the land surface model, which in turn is used to force the river routing component. Originally, CaLDAS was designed to improve atmospheric forecasts with less focus on hydrological processes. When snow data assimilation occurs, the related increments remove/add water from/to the system, which can sometimes be problematic for streamflow forecasting, in particular during the snowmelt period. In this study, a new snow analysis method introduces multiple innovations that respond to the need for higher quality snow analyses for hydrological purposes, including the use of IMS snow cover extent data instead of in situ snow depth observations. The results show that the new snow assimilation methodology brings an overall improvement to snow analyses and substantially enhances water conservation, which is reflected in the generally improved streamflow simulations. This work represents a first step towards a new snow data assimilation process in CaLDAS, with the final objective of producing a reliable snow analysis to initialise and improve NWP as well as environmental predictions, including flood and drought forecasts.
机构:
Univ Washington, Dept Civil & Environm Engn, Land Surface Hydrol Res Grp, Seattle, WA 98195 USAUniv Washington, Dept Civil & Environm Engn, Land Surface Hydrol Res Grp, Seattle, WA 98195 USA
Andreadis, Konstantinos M.
Lettenmaier, Dennis P.
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Univ Washington, Dept Civil & Environm Engn, Land Surface Hydrol Res Grp, Seattle, WA 98195 USAUniv Washington, Dept Civil & Environm Engn, Land Surface Hydrol Res Grp, Seattle, WA 98195 USA
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European Ctr Medium Range Weather Forecasts ECMWF, Shinfield Pk, Reading RG2 9AX, Berks, EnglandEuropean Ctr Medium Range Weather Forecasts ECMWF, Shinfield Pk, Reading RG2 9AX, Berks, England
de Rosnay, Patricia
Munoz-Sabater, Joaquin
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European Ctr Medium Range Weather Forecasts ECMWF, Shinfield Pk, Reading RG2 9AX, Berks, EnglandEuropean Ctr Medium Range Weather Forecasts ECMWF, Shinfield Pk, Reading RG2 9AX, Berks, England
Munoz-Sabater, Joaquin
Albergel, Clement
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European Ctr Medium Range Weather Forecasts ECMWF, Shinfield Pk, Reading RG2 9AX, Berks, England
Univ Toulouse, CNRM, CNRS, Meteo France, F-31057 Toulouse, FranceEuropean Ctr Medium Range Weather Forecasts ECMWF, Shinfield Pk, Reading RG2 9AX, Berks, England
Albergel, Clement
Isaksen, Lars
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European Ctr Medium Range Weather Forecasts ECMWF, Shinfield Pk, Reading RG2 9AX, Berks, EnglandEuropean Ctr Medium Range Weather Forecasts ECMWF, Shinfield Pk, Reading RG2 9AX, Berks, England
Isaksen, Lars
English, Stephen
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European Ctr Medium Range Weather Forecasts ECMWF, Shinfield Pk, Reading RG2 9AX, Berks, EnglandEuropean Ctr Medium Range Weather Forecasts ECMWF, Shinfield Pk, Reading RG2 9AX, Berks, England
English, Stephen
Drusch, Matthias
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European Space Agcy, Estec, Noordwijk, NetherlandsEuropean Ctr Medium Range Weather Forecasts ECMWF, Shinfield Pk, Reading RG2 9AX, Berks, England
Drusch, Matthias
Wigneron, Jean-Pierre
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INRA, ISPA, UMR 1391, CS 20032, F-33882 Villenave Dornon, FranceEuropean Ctr Medium Range Weather Forecasts ECMWF, Shinfield Pk, Reading RG2 9AX, Berks, England
机构:
Univ Washington, Dept Civil & Environm Engn, Land Surface Hydrol Res Grp, Seattle, WA 98195 USAUniv Washington, Dept Civil & Environm Engn, Land Surface Hydrol Res Grp, Seattle, WA 98195 USA
Andreadis, Konstantinos M.
Lettenmaier, Dennis P.
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Univ Washington, Dept Civil & Environm Engn, Land Surface Hydrol Res Grp, Seattle, WA 98195 USAUniv Washington, Dept Civil & Environm Engn, Land Surface Hydrol Res Grp, Seattle, WA 98195 USA
机构:
European Ctr Medium Range Weather Forecasts ECMWF, Shinfield Pk, Reading RG2 9AX, Berks, EnglandEuropean Ctr Medium Range Weather Forecasts ECMWF, Shinfield Pk, Reading RG2 9AX, Berks, England
de Rosnay, Patricia
Munoz-Sabater, Joaquin
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h-index: 0
机构:
European Ctr Medium Range Weather Forecasts ECMWF, Shinfield Pk, Reading RG2 9AX, Berks, EnglandEuropean Ctr Medium Range Weather Forecasts ECMWF, Shinfield Pk, Reading RG2 9AX, Berks, England
Munoz-Sabater, Joaquin
Albergel, Clement
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h-index: 0
机构:
European Ctr Medium Range Weather Forecasts ECMWF, Shinfield Pk, Reading RG2 9AX, Berks, England
Univ Toulouse, CNRM, CNRS, Meteo France, F-31057 Toulouse, FranceEuropean Ctr Medium Range Weather Forecasts ECMWF, Shinfield Pk, Reading RG2 9AX, Berks, England
Albergel, Clement
Isaksen, Lars
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h-index: 0
机构:
European Ctr Medium Range Weather Forecasts ECMWF, Shinfield Pk, Reading RG2 9AX, Berks, EnglandEuropean Ctr Medium Range Weather Forecasts ECMWF, Shinfield Pk, Reading RG2 9AX, Berks, England
Isaksen, Lars
English, Stephen
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h-index: 0
机构:
European Ctr Medium Range Weather Forecasts ECMWF, Shinfield Pk, Reading RG2 9AX, Berks, EnglandEuropean Ctr Medium Range Weather Forecasts ECMWF, Shinfield Pk, Reading RG2 9AX, Berks, England
English, Stephen
Drusch, Matthias
论文数: 0引用数: 0
h-index: 0
机构:
European Space Agcy, Estec, Noordwijk, NetherlandsEuropean Ctr Medium Range Weather Forecasts ECMWF, Shinfield Pk, Reading RG2 9AX, Berks, England
Drusch, Matthias
Wigneron, Jean-Pierre
论文数: 0引用数: 0
h-index: 0
机构:
INRA, ISPA, UMR 1391, CS 20032, F-33882 Villenave Dornon, FranceEuropean Ctr Medium Range Weather Forecasts ECMWF, Shinfield Pk, Reading RG2 9AX, Berks, England