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S. B élair, J.Mailhot Meteorological Research Division, Environment Canada

The High-Resolution Numerical Weather Prediction Systems for the 2010 Vancouver Olympics. S. B élair, J.Mailhot Meteorological Research Division, Environment Canada. WWRP VRWG and MWFRWG joint meeting, Berlin, Germany, 10 Sept. 2011. 3. 2. 1.

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S. B élair, J.Mailhot Meteorological Research Division, Environment Canada

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  1. The High-Resolution Numerical Weather Prediction Systems for the 2010 Vancouver Olympics S. Bélair, J.Mailhot Meteorological Research Division, Environment Canada WWRP VRWG and MWFRWG joint meeting, Berlin, Germany, 10 Sept. 2011

  2. 3 2 1 VANCOUVER-2010: EC’s EXPERIMENTAL MESOSCALE SYSTEMS REGIONAL EPS 15-km GEM-LAM HIGH-RESOLUTION DETERMINISTIC ATMOSPHERIC SYSTEM 33-km GEM-LAM IC + LBC 33-km GEM-LAM 1-km GEM-LAM 2.5-km GEM-LAM IC + LBC 20 members Adaptor 2D-external land surface System (100 m) 33-km GEM-LAM Single-Point 33-km GEM-LAM EXTERNAL LAND SURFACE SYSTEM Mailhot et al., 2010: BAMS., 91, 1073-1085. (Thanks to Juan Sebastian Fontecilla)

  3. Whistler 15 km 2.5 km 1 km Vancouver NESTING STRATEGY FOR LAM-V10 MESOSCALE NWP SYSTEM GEM-LAM integrations, twice daily, starting from 0000 and 1200 UTC GEM-Regional forecasts: LAM-15 km → 2.5 km → 1 km Comes with: Improved dynamics Improved physics New diagnostic outputs

  4. CUSTOMIZED OUTPUT PACKAGE Cloud cover: Low, mid, high Wind gusts Low level winds Surface winds Cloud base Windchill Dewpoint, RH Temperature Visibility: fog, rain, snow, resultant 2-D maps (1 km) QPF by type: cumul. , instant. QPF: /1h, /3h,/6h, cumulative

  5. CUSTOMIZED OUTPUT PACKAGE Clouds and visibility Wind and Gusts T, Td etc. General Wx Meteograms (1 km) Snow Precipitation PCP Rates

  6. EC’s EXTERNAL LAND SURFACE MODELING for VO2010 100-m snow analyses Great decrease of T2m errors (bias shown here) Bernier et al., 2011, J. Hydromet., 12, 508-530. (Thanks to Juan Sebastian Fontecilla)

  7. OBJECTIVE EVALUATION... Snow density (falling), 23 Feb. 2010 Surface variables: snow depth, snow density, snow albedo, surface temperature, soil moisture (if applicable). Traditional near-surface variables: temperature, humidity, winds (speed and direction) New near-surface variables: wind gusts, visibility (fog, rain, snow, total) Clouds and precipitation: Cloud base height, cloud coverage (low, mid, and high levels), QPF (total and by type, instantaneous and cumulative), density of falling snow Visibility, Whistler, 13 March 2010

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