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DTSTAMP:20250805T100746Z
DESCRIPTION:Tropical Subseasonal Variability and Its Teleconnection in Cana
 dian EC GEM\n\nAccording to the past studies\, the analysis of observation
 s indicates the tropical convection anomaly may have impacts on the pressu
 re distribution in higher latitude with Rossby wave train. Aimed at improv
 ing the Madden-Julian Oscillation (MJO) in Global Environmental Multiscale
  Model developed by Environment Canada (EC GEM) and the prediction of the 
 wintertime weather in North America\, the convection structure of MJO and 
 the teleconnection in the north hemisphere from GEM are assessed.  In gene
 ral\, the significant convective features of MJO can be reproduced by GEM 
 and the signal is also more intense than observation. In the 23 model year
 s\, the outgoing longwave radiation (OLR) and the precipitation distributi
 on in the tropics from our simulation is able to represent the eastward pr
 opagation of the convection system and to capture the corresponding locati
 ons of convection in each phase of MJO. Based on the MJO index defined by 
 Wheeler and Hendon\, the same method is applied here for the further analy
 sis of the linkage between the tropical subseasonal variability and the te
 leconnection in the Northern Hemisphere.  Since the MJO index can be consi
 dered as the convection signal\, the lag composite analysis of the geopote
 ntial height with the index depicts the distribution after the convection.
  After MJO phase 3\, the convection occurance in the Indian Ocean\, the 50
 0hPa geopotential height anomaly draws a positive-North Atlantic Oscillati
 on (NAO) like pattern. While after the convection reaches the Western Paci
 fic Ocean\, MJO Phase 7\, the 500hPa geopotential height anomaly behaves l
 ike negative NAO pattern. Reversely\, the lag composite of NAO index in GE
 M with respect to each MJO phase also has the statistic significant correl
 ation to phase 3 and 7\, which is similar to the former research that reve
 als the connection between the NAO and the MJO. Results in this study sugg
 est the understanding of MJO may provide an access to the better forecast 
 of the wintertime weather in North America.\n
DTSTART:20160413T190000Z
DTEND:20160413T203000Z
LOCATION:Room 934\, Burnside Hall\, CA\, QC\, Montreal\, H3A 0B9\, 805 rue 
 Sherbrooke Ouest
SUMMARY:Student Seminar: Pei-Ning Feng
URL:/meteo/channels/event/student-seminar-pei-ning-fen
 g-256985
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