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Arctic-North Pacific coupled impacts on late autumn cold over North America

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Title
Arctic-North Pacific coupled impacts on late autumn cold over North America
Other Titles
최근 북미 한파에 북극-북태평양 상호작용이 미친 영향
Authors
Sung, Mi-Kyung
Baek, Eun-Hyuk
Kim, Baek-Min
Issue Date
2015
Citation
Sung, Mi-Kyung, Baek, Eun-Hyuk, Kim, Baek-Min. 2015. Arctic-North Pacific coupled impacts on late autumn cold over North America. 2015년 한국기상학회 가을학술대회. 제주도. 2015.10.12~2015.10.14.
Abstract
It is examined about a physical linkage between the North Pacific SST and cold weather over North America as well as an underlying modulation effect by arctic condition during October to November. A representative oceanic variability in the North Pacific, the Pacific Decadal Oscillation (PDO), is known to bring anomalous cold over North America while its phase corresponds to positive. This study finds that the cold anomaly tends to intensify when the arctic surface exhibits pronounced warming over the Chukchi and East Siberian Sea regions. The modulation effect by arctic temperature manifests as an altered Rossby wave response to transient vorticity forcing resulting from equatorward storm track shift which is induced collaboratively by the PDO and warm arctic. In order to support observational evidences, arctic restoring experiments using CM2.1 model and stationary wave model (SWM) results are presented.
URI
http://repository.kopri.re.kr/handle/201206/8349
Conference Name
2015년 한국기상학회 가을학술대회
Conference Place
제주도
Conference Date
2015.10.12~2015.10.14
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