두가지 종류의 엘니뇨

Title
두가지 종류의 엘니뇨
Alternative Title
Two types of El Nino events: Cold tongue El Nino and Warm pool El Nino
Author(s)
국종성; fei-Fei Jin; 안순일
Publication Year
2009-05-27
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 byrelatively 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) playsa 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/29526
Bibliographic Citation
한국해양과학기술협의회, pp.68 - 69, 2009
Publisher
한국해양과학기술협의회
Type
Conference
Language
Korean
Publisher
한국해양과학기술협의회
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