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논문 기본 정보

Type
Thesis
Author

김혜림 (연세대학교, Graduate School, Yonsei University)

Adviser
Soon-Il An
Issue Year
2017
Copyright
연세대학교 thesis is protected by copyright.

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Research history (2)

2019

Change in the relationship between winter Pacific Decadal Oscillation and spring sea-ice extent in the Pacific Arctic sector before and after the mid-1990s
김혜림 ,  예상욱 ,  안순일 and others 1 한국기상학회 학술대회 논문집 2019.10 Proceeding

2017

북극 해빙 감소가 중위도의 기후에 미치는 영향
김혜림 2017.01 Thesis
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Abstract· Keywords

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Reducing trend of Arctic sea ice area has been accelerated in response to global warming and its variability has been increased over the past three decades. On the other hand, Arctic cold air is more frequently to move into middle latitudes as the polar jet is heavily meandering which causes cold and persistent extremes in the North America and Eurasia. However, it is not known how Arctic sea ice, especially in Chukchi sea (CS) and the North Pacific climate are interacting and whether such interaction has implication for Pacific Decadal Oscillation (PDO). Here, through the analysis of various reanalysis data sets and a CGCM simulation, we show that the year-through-year persistency of PDO has been increased recently, which is concurred with a shift toward opposite phase in relationship between PDO and sea ice extension in CS. This longer persistency is closely related to the boosted reemergence effect through a prolonged memory of springtime sea ice to the following fall, in which the previous wintertime PDO influences the springtime CS sea ice, and CS sea ice during fall in turn modifies PDO. A CGCM simulation confirmed the observed findings and further implied that the longer persistency causes PDO to be longer with sea ice feedback on it.
#Pacific decadal oscillation (PDO) #sea ice

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