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DTSTAMP:20261027T165207Z
DESCRIPTION: \n\nStudent Seminar Series\n\nDepartment of Atmospheric & Ocea
 nic Sciences\n\npresents\n\na talk by\n\nKai Melamed-Turkish\n	MSc Student
 \n\nA Dynamic Approach to the development of a precipitation climatology a
 s applied to Montréal\, Québec\n\nMost precipitation climatologies partiti
 on the precipitation time series by identifying 24-\, 48- or 72-h precipit
 ation events. However\, these partitioning methods inherently lack physica
 l intuition. Here\, I will present a precipitation climatology for Montréa
 l\, Québec that utilizes our understanding of atmospheric dynamics.\n\nThe
  quasigeostrophic (QG) omega equation provides meteorologists with a means
  to qualitatively diagnose vertical motion\, which is necessary to produce
  precipitation\, in the atmosphere. Knowing the positions of the low-level
  cyclones and anticyclones relative to the upper-level troughs and ridges\
 , we can infer the contributions of the low-level temperature advections a
 nd upper-level vorticity advections towards omega. With this knowledge\, w
 e can use the troughs and ridges in the 500-hPa geopotential heights to qu
 alitatively diagnose the vertical motion in the atmosphere and partition t
 he precipitation time series. The end result is a 40-year climatology wher
 e we investigate whether precipitation in Montréal conforms to our expecta
 tions from the QG-omega equation.\n\nAcross all seasons\, our results show
  that Montreal receives significantly more intense precipitation during th
 e times when we expect unambiguous ascent\, and significantly less intense
  precipitation during periods when we expect unambiguous descent. During t
 he periods when we expect unambiguous ascent\, the values of omega are the
  lowest (strongest ascent) and the 850-hPa equivalent potential temperatur
 e (qe) anomalies are the highest and vice-versa for the periods of unambig
 uous descent. Overall\, the results suggest that\, climatologically\, prec
 ipitation in Montréal conforms to expectations from the QG-omega equation.
 \n\nWednesday Nov 06/ 2.30 PM/ Room 934 Burnside Hall\n\n \n\n \n\n \n
DTSTART:20191106T193000Z
DTEND:20191106T203000Z
LOCATION:Room 934\, Burnside Hall\, CA\, QC\, Montreal\, H3A 0B9\, 805 rue 
 Sherbrooke Ouest
SUMMARY:A Dynamic Approach to the development of a precipitation climatolog
 y as applied to Montréal\, Québec
URL:https://www.mcgill.ca/meteo/channels/event/dynamic-approach-development
 -precipitation-climatology-applied-montreal-quebec-302204
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