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| Titel |
Vancouver 2010 Winter Olympics Land Surface Forecast System |
| VerfasserIn |
N. B. Bernier, S. Belair, L. Tong, M. Abrahamowicz, J. Mailhot |
| Konferenz |
EGU General Assembly 2009
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250021571
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| Zusammenfassung |
| Environment Canada's land surface forecast system developed for the
Vancouver 2010 Winter Olympics is presented together with an
evaluation of its performance for winters 2007-2008 and 2008-2009. The
motivation for this work is threefold: it is i) application driven for
the 2010 Vancouver Olympics, ii) a testbed for the panCanadian
operational land surface forecast model being developed, and iii) the
precursor to the fully coupled land-surface model to come. The new
high resolution (100m grid size), 2D, and novel imbedded point-based
land surface forecast model used to predict hourly snow and surface
temperature conditions at Olympic and Paralympic Competition Sites are
described. The surface systems are driven by atmospheric forcing
provided by the center's operational regional forecast model for the
first 48 hours and by the operational global forecast model for hours
49 to 96. The forcing fields are corrected for elevation
discrepancies over the rapidly changing and complex mountainous
settings of the Vancouver Olympics that arise from resolution
differences. Daily 96h land surface forecasts for 2 winters and snow
depth and surface air temperature observations collected at several
specially deployed competition sites are used to validate the land
surface model. We show that the newly implemented surface forecast
model refines and improves snow depth and surface temperature forecast
issued by the operational weather forecast system throughout the
forecast period. |
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