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Assessment of reanalysis forcings for use within Canada-wide water budgets

Earth Sciences Sector. Assessment of reanalysis forcings for use within Canada-wide water budgets. An Activity within the ESS Climate Change Programme. Vladimir.Korolevich @nrcan.gc.ca Richard Fernandes, Shusen Wang, Anita Simic, Fanfei Gong, Peter Zelic (Canada Centre for Remote Sensing).

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Assessment of reanalysis forcings for use within Canada-wide water budgets

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  1. Earth Sciences Sector Assessment of reanalysis forcings for use within Canada-wide water budgets An Activity within the ESS Climate Change Programme Vladimir.Korolevich @nrcan.gc.ca Richard Fernandes, Shusen Wang, Anita Simic, Fanfei Gong, Peter Zelic (Canada Centre for Remote Sensing)

  2. Research Question • How do model reanalysis forcings compare to in-situ point observations? • How does ET derived from hydrological model differ based on reanalysis versus observed forcing fields? • For a given forcing dataset, what is the partial contribution of uncertainties for each climate variable to uncertainties in modelled ET?

  3. ET Estimation • Approach: Apply climate forcings to validated point model (EALCO) for each 1km grid cell. • Requirements: • Satellite Earth Observation data for surface parameters. • Point estimates of ET for calibration and validation. • ~30km resolution, hourly forcing fields for Canada: • Precipitation (rain and snow), 2m air temperature, 2m wind speed, 2m specific humidity, surface down welling shortwave and longwave radiation, 2m air pressure

  4. Observed Station Climate Data1960-1990: Hourly Rain, Snow, Insolation, Air Temp, Specific Humidity, Surface Pressure Mean Annual Precipitation (1961-1990) at Canadian Weather .. (CWEEDS) stations

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