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SUMMARY:Different types of El Niño and impact on Eurasian Climate - Prof 
 Hans Graf\, Department of Geography\, University of Cambridge
DTSTART:20120202T161500Z
DTEND:20120202T173000Z
UID:TALK35370@talks.cam.ac.uk
CONTACT:Dr Alex Archibald
DESCRIPTION:El Niños are periods of warming of equatorial ocean surfaces 
 in the Pacific. This lecture discusses variable teleconnections and possib
 le effects of El Niño on North Atlantic/European regional climates. Two d
 ifferent types of El Niños (the Central Pacific\, or CP\, and the East Pa
 cific\, or EP) result in remarkably different European winter temperature 
 anomalies\, specifically weak warming during EP and significant cooling du
 ring CP El Niños. We propose a tropospheric bridge as the mechanism prima
 rily responsible for the establishment of a negative NAO phase and of asso
 ciated cold European winters. As global warming scenarios project an incre
 ase in the frequency of CP El Niño events\, the distinctive nature of thi
 s mechanism implies that the probability of cold European winters may incr
 ease as well in future decades.
LOCATION:Pfizer  Lecture Theatre\,  Department of Chemistry
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