적도태평양에서 dipole구조를 가지는 해수면 온도 변동성의 특성

Title
적도태평양에서 dipole구조를 가지는 해수면 온도 변동성의 특성
Alternative Title
The SST variability of dipole-like structure in the tropical Pacific
Author(s)
예상욱; 김철호; 박영규; 민홍식; Ben Kirtman
KIOST Author(s)
Park, Young Gyu(박영규)
Publication Year
2005-05-12
Abstract
An index is defined to describe changes in ENSO amplitude without any filtering of the raw sea surface temperature (SST) data in the observations and a long-term simulation of a coupled general circulation model (CGCM). Using this simple index we examine the relationship between changes in ENSO amplitude and the variability of dipole-like SST mode in the tropical Pacific. Our analysis shows that the dipole-like characteristics of this mode is due to a difference of an east-west zonal displacement of El Nino and La Nina’s center of action between periods of relatively high and low ENSO variance. The El Nino’s center is shifted eastward compared to that of La Nina during periods of high ENSO variance, whereas during periods of low ENSO variance this east-west zonal displacement for the El Nino and La Nina is reversed. We argue here that this dipole pattern is the non-linear rectification of periods of high and low ENSO variance, and is not the cause for the changes in the variance.
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/31502
Bibliographic Citation
한국해양과학기술협의회 공동학술대회 학술지, pp.94 - 97, 2005
Publisher
한국해양과학기술협의회
Type
Conference
Language
English
Publisher
한국해양과학기술협의회
Related Researcher
Research Interests

ocean circulation,ocean mixing,marine debris,해양순환,해양혼합,해양부유물

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