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UID:20260911T222947EDT-7642Inufwb@132.216.98.100
DTSTAMP:20260912T022947Z
DESCRIPTION: \n\nStudent Seminar Series\n\nDepartment of Atmospheric & Ocea
 nic Sciences\n\npresents\n\na talk by\n\nMinh-Tri Nguyen\n	MSc student\n\nE
 ffects of the spatial scales in the initial conditions of numerical weathe
 r forecasts\n\nDespite numerous improvements in technology\, there are sti
 ll many differences between the numerical weather forecasts and the observ
 ations of the weather\, especially in precipitation. Although many factors
  could explain these differences\, we focus on the spatial scale of the in
 itial conditions: is it more important to have accurate state variables at
  the small scales or at the large scales? To obtain some insight into this
  question\, the case of a squall line event is studied in numerical experi
 ments by removing successively more and more of the small scales in the in
 itial conditions. Here\, rather than filtering one by one each field of th
 e state variable\, such as the temperature and the wind fields\, the poten
 tial vorticity (PV) field is filtered and the piecewise PV inversion techn
 ique (Davis and Emanuel\, 1991) is used to obtain the initial state variab
 le fields. The filtered initial conditions are then used to simulate the s
 quall line event using the Weather and Research Forecasting model (WRF). I
 n this seminar\, we will outline our methodology and present comparison of
  the simulated rain rates with those from the radar observations.\n\nWedne
 sday Jan 29/ 2.30 PM/ Room 934 Burnside Hall\n\n \n
DTSTART:20200129T193000Z
DTEND:20200129T203000Z
LOCATION:Room 934\, Burnside Hall\, CA\, QC\, Montreal\, H3A 0B9\, 805 rue 
 Sherbrooke Ouest
SUMMARY:Effects of the spatial scales in the initial conditions of numerica
 l weather forecasts
URL:https://www.mcgill.ca/meteo/channels/event/effects-spatial-scales-initi
 al-conditions-numerical-weather-forecasts-316775
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