Characteristic of Near-Inertial Waves occurred by a Typhoon in the tropical Northwestern Pacific Ocean

Title
Characteristic of Near-Inertial Waves occurred by a Typhoon in the tropical Northwestern Pacific Ocean
Author(s)
김응; 전동철; 박재훈; 장찬주
KIOST Author(s)
Kim, Eung(김응)Jang, Chan Joo(장찬주)
Alternative Author(s)
김응; 전동철; 박재훈; 장찬주
Publication Year
2012-02-23
Abstract
Near-Inertial Waves (NIW) were occurred by a typhoon passing by not far from our subsurface mooring location; this system has been deployed at 15°48.37′N and 134°37.97′E in the northwestern Pacific since October 8, 2007. The typhoon Rammason was originated at 7.2°N and 134.2°E on May 6, 2008, which grew a middle-class typhoon of the category 3 and 4 and moved northwards along 132°E from May 9 to 11, and then disappeared at 33.4°N and 146.8°E on May 13. The NIW occurred by the typhoon vertically propagate into the deeper layer, and its propagation speed increases with depth. As the vertical propagation speed of the wave energy is gradually faster with increasing depths, the period of the NIW becomes gradually shorter. Our observation reveals that NIWs shift their periods from 1.09Tf to 0.92Tf , where Tf is the local inertial period, as propagated from 50m to 350 m. It is the first measurement in the tropical northwestern Pacific Ocean while there are a lot of previous reports about NIW in the marginal seas, especially in high latitudes Rammason was originated at 7.2°N and 134.2°E on May 6, 2008, which grew a middle-class typhoon of the category 3 and 4 and moved northwards along 132°E from May 9 to 11, and then disappeared at 33.4°N and 146.8°E on May 13. The NIW occurred by the typhoon vertically propagate into the deeper layer, and its propagation speed increases with depth. As the vertical propagation speed of the wave energy is gradually faster with increasing depths, the period of the NIW becomes gradually shorter. Our observation reveals that NIWs shift their periods from 1.09Tf to 0.92Tf , where Tf is the local inertial period, as propagated from 50m to 350 m. It is the first measurement in the tropical northwestern Pacific Ocean while there are a lot of previous reports about NIW in the marginal seas, especially in high latitudes
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/27907
Bibliographic Citation
2012 Ocean Science Meeting, pp.241, 2012
Publisher
AGU
Type
Conference
Language
English
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