Seasonal Variation of Submesoscale Flow Features in a Mesoscale Eddy-dominant Region in the East Sea
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Title
- Seasonal Variation of Submesoscale Flow Features in a Mesoscale Eddy-dominant Region in the East Sea
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Author(s)
- Chang, Yeon S.; Choi, Byoung-Ju; Park, Young-Gyu
- KIOST Author(s)
- Chang, Yeon S.(장연식); Park, Young Gyu(박영규)
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Alternative Author(s)
- 장연식; 박영규
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Publication Year
- 2018-06
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Abstract
- Seasonal changes in the distribution of submesoscale (SM) flow features were examined using a fine-resolution numerical simulation. The SM flows are expected to be strong where mesoscale (MS) eddies actively develop and also when the mixed layer depth (MLD) is deep due to enhanced baroclinic instability. In the East Sea (ES), MS eddies more actively develop in summer while the MLD is deeper in winter, which provided the motivation to conduct this study to test the effects of MLD and MS eddies on the SM activity in this region. Finite-scale Liapunov exponents and the vertical velocity components were employed to analyze the SM activities. It was found that the SM intensity was marked by seasonality: it is stronger in winter when the mixed layer is deep but weaker in summer - despite the greater eddy kinetic energy. This is because in summer the mixed layer is so thin that there is not enough available potential energy. When the SM activity was quantified based on parameterization, (MLD x density gradient), it was determined that the seasonal variation of MLD plays a more important role than the lateral density gradient variation on SM flow motion in the ES.
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ISSN
- 1738-5261
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URI
- https://sciwatch.kiost.ac.kr/handle/2020.kiost/898
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DOI
- 10.1007/s12601-018-0008-0
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Bibliographic Citation
- OCEAN SCIENCE JOURNAL, v.53, no.2, pp.191 - 206, 2018
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Publisher
- KOREA OCEAN RESEARCH DEVELOPMENT INST
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Subject
- MIXED-LAYER INSTABILITIES; SIZE LYAPUNOV EXPONENTS; OCEANIC VERTICAL PUMP; GULF-STREAM REGION; RELATIVE DISPERSION; PART I; TRANSPORT; PARAMETERIZATION; SYSTEM; IMPACT
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Keywords
- submesoscales; East Sea; seasonal variation; FSLE
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Type
- Article
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Language
- English
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Document Type
- Article
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