Assessment of reanalysis forcings for use within Canada-wide water budgets
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Reducing Canada's vulnerability to climate change - ESS
Assessment of reanalysis forcings for use within Canada-wide water budgets
Vladimir.Korolevich @nrcan.gc.caRichard Fernandes, Shusen Wang,
Anita Simic, Fanfei Gong, Peter Zelic
(Canada Centre for Remote Sensing)
An Activity within the ESS Climate Change Programme
Earth Sciences Sector
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Reducing Canada's vulnerability to climate change - ESS
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?
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Reducing Canada's vulnerability to climate change - ESS
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
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Reducing Canada's vulnerability to climate change - ESS
Observed Station Climate Data 1960-1990: Hourly Rain, Snow, Insolation,
Air Temp, Specific Humidity, Surface Pressure
Mean Annual Precipitation (1961-1990) at
Canadian Weather .. (CWEEDS) stations