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Decadal changes in surface air temperature variability and cold surge characteristics over northeast Asia and their relation with the Arctic Oscillation for the past three decades (1979-2011)

Cited 26 time in scopus
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Title
Decadal changes in surface air temperature variability and cold surge characteristics over northeast Asia and their relation with the Arctic Oscillation for the past three decades (1979-2011)
Other Titles
지난 30년간 북동아시아의 한파 경년변동과 북극진동 변동 과의 관계에 대한 연구
Authors
Jeong, Jee-Hoon
Kim, Baek-Min
Woo, Sung-Ho
Kim, Seong-Joong
Lim, Gyu-Ho
Subject
Meteorology & Atmospheric Sciences
Keywords
Arctic Oscillation; Atmosphere Circulation; Cold Surges; Surface air temperature; Teleconnection
Issue Date
2012
Publisher
American Geophysical Union.
Citation
Jeong, Jee-Hoon, et al. 2012. "Decadal changes in surface air temperature variability and cold surge characteristics over northeast Asia and their relation with the Arctic Oscillation for the past three decades (1979-2011)". JOURNAL OF GEOPHYSICAL RESEARCH, 117(D18): 1-16.
Abstract
Decadal changes in surface air temperature (SAT) variability and cold surge characteristics over Northeast Asia during late winter (January?March) are analyzed for the past three decades. Power spectrum analysis of SAT reveals that the low-frequency variabilities with a period longer than 10 days are significantly enhanced, while the high-frequency variabilities with a period shorter than 10 days are weakened in the 1980s and 2000s. Moreover, cold surges were stronger and lasted longer during the 1980s and 2000s compared to those that occurred in the 1990s. Here, we propose that large-scale atmospheric conditions manifested by a different phase of the Arctic Oscillation (AO) provide preconditioning for a cold surge event, which showed a prominent decadal fluctuation. The more (less) frequent strong and long-lasting cold surge occurrences in the 1980s and 2000s (1990s) are preceded by the more dominant negative (positive) phase of the AO. Lag-composite analyses for cold surge events categorized by the AO phases indicate that stronger and longer-lasting cold air advection dominates at the lower-level, when upper-level wave train and coastal trough are developed over East Asia under the strong negative AO phase. These results suggest that the decadal changes in SAT variability and cold surge characteristics are strongly associated with the decadal changes in the phase distribution of the AO.the low-frequency variabilities with a period longer than 10 days are significantly enhanced, while the high-frequency variabilities with a period shorter than 10 days are weakened in the 1980s and 2000s. Moreover, cold surges were stronger and lasted longer during the 1980s and 2000s compared to those that occurred in the 1990s. Here, we propose that large-scale atmospheric conditions manifested by a different phase of the Arctic Oscillation (AO) provide preconditioning for a cold surge event, which showed a prominent decadal fluctuation. The more (less
URI
http://repository.kopri.re.kr/handle/201206/6352
DOI
http://dx.doi.org/10.1029/2011JD016929
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