두가지 타입의 엘니뇨

Title
두가지 타입의 엘니뇨
Alternative Title
Two-types of El Nino Events; Cold tongue El Nino vs Warm Pool El Nino
Author(s)
국종성
Publication Year
2009-07-02
Abstract
In this study, two types of El Nino events are classified based on spatial patterns of sea-surface temperature (SST) anomaly. One is cold tongue (CT) El Nino, which can be regarded as the conventional El Nino, and the other is Warm Pool (WP) El Nino. The CT El Nino is characterized by relatively large SST anomalies in the NINO3 region (5S-5N, 150-90W), while the WP El Nino is associated with SST anomalies mostly confined to the NINO4 region (5S-5N, 160E-150W). In addition, spatial patterns of many atmospheric and oceanic variables are also distinctively different for the two types of El Nino events. Furthermore, difference in the transition mechanism between two types of El Nino is clearly identified. That is, the discharge process of the equatorial heat content associated with the WP El Nino is not efficient due to the spatial structure of SST anomaly; as a result, it cannot trigger a cold event. It is also demonstrated that the zonal advective feedback (i.e., zonal advection of mean SST by anomalous zonal current) plays a crucial role in the development of a decaying SST anomaly associated with the WP El Nino, while the thermocline feedback is a key process during the CT El Nino
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/20826
Bibliographic Citation
일본 큐슈 대학교, pp.1, 2009
Publisher
일본 큐슈 대학교
Type
Conference
Language
English
Publisher
일본 큐슈 대학교
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