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The prominence of a tropical convective signal in the wintertime Arctic temperature

Title
The prominence of a tropical convective signal in the wintertime Arctic temperature
Authors
Yoo, ChanghyunFeldstein, Steven B.Lee, Sukyoung
Ewha Authors
유창현
SCOPUS Author ID
유창현scopus
Issue Date
2014
Journal Title
ATMOSPHERIC SCIENCE LETTERS
ISSN
1530-261XJCR Link
Citation
ATMOSPHERIC SCIENCE LETTERS vol. 15, no. 1, pp. 7 - 12
Keywords
spectral analysisArctic temperatureMJO
Publisher
WILEY-BLACKWELL
Indexed
SCIE; SCOPUS WOS
Document Type
Article
Abstract
Power spectral analysis reveals that the Arctic temperature averaged over 60 degrees N-90 degrees N oscillates on intraseasonal time scales, centered at about 40days. We present evidence that this intraseasonal peak is strongly tied to the Madden-Julian Oscillation (MJO), the dominant mode of tropical intraseasonal variability. Although an MJO/extratropical surface air temperature relationship has been found in previous studies, our results indicate that this relationship is more prevalent than previously recognized and is strongest at the Arctic surface. This bottom-heavy temperature structure suggests that Arctic surface warming can arise from remote processes, and not necessarily from surface albedo feedback as previously argued.
DOI
10.1002/asl2.455
Appears in Collections:
일반대학원 > 대기과학공학과 > Journal papers
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