Nonlinear impact of the Arctic Oscillation on extratropical surface air temperature SCIE SCOPUS

Cited 8 time in WEB OF SCIENCE Cited 9 time in Scopus
Title
Nonlinear impact of the Arctic Oscillation on extratropical surface air temperature
Author(s)
Son, Hye-Young; Park, Wonsun; Jeong, Jee-Hoon; Yeh, Sang-Wook; Kim, Baek-Min; Kwon, Minho; Kug, Jong-Seong
KIOST Author(s)
Kwon, Min Ho(권민호)
Alternative Author(s)
손혜영; 권민호; 국종성
Publication Year
2012-10
Abstract
The Arctic Oscillation (AO) is the leading climate mode of sea level pressure (SLP) anomalies during cold season in the Northern Hemisphere. To a large extent, the atmospheric climate anomalies associated with positive and negative phases of the AO are opposite to each other, indicating linear impact. However, there is also significant nonlinear relationship between the AO and other winter climate variability. We investigate nonlinear impacts of the AO on surface air temperature (SAT) using reanalysis data and a multimillennial long climate simulation. It is found that SAT response to the AO, in terms of both spatial pattern and magnitude, is almost linear when the amplitude of the AO is moderate. However, the response becomes quite nonlinear as the amplitude of the AO becomes stronger. First, the pattern shift in SAT depends on AO phase and magnitude, and second, the SAT magnitude depends on AO phase. In particular, these nonlinearities are distinct over the North America and Eurasian Continent. Based on the analyses of model output, we suggest that the nonlinear zonal advection term is one of the critical components in generating nonlinear SAT response, particularly over the North America.
ISSN
0148-0227
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/3436
DOI
10.1029/2012JD018090
Bibliographic Citation
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, v.117, 2012
Publisher
AMER GEOPHYSICAL UNION
Type
Article
Language
English
Document Type
Article
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