A general rule for synoptic-eddy feedback onto low-frequency flow
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Title
- A general rule for synoptic-eddy feedback onto low-frequency flow
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Author(s)
- Kug, Jong-Seong; Jin, Fei-Fei; Park, Juhyun; Ren, Hong-Li; Kang, In-Sik
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Alternative Author(s)
- 국종성
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Publication Year
- 2010-11
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Abstract
- In this study, scale interaction between synoptic eddies and low-frequency flow is investigated. It is demonstrated here that there is a general rule, the "left-hand rule", that describes synoptic eddy feedback onto low-frequency flow. The rule is that low-frequency anomalies systematically stir and deform the transient eddies in such a way that the irrotational eddy-vorticity fluxes are directed preferentially about 90A degrees toward the left-hand side of the low-frequency flow; thus this eddy feedback plays a positive role in maintaining and prolonging low-frequency flow under the stormy atmosphere. Similarly, we show that the irrotational eddy-temperature and moisture fluxes are also directed preferentially about 90A degrees toward the left-hand side of the low-frequency flow in the northern hemisphere. The eddy-temperature fluxes and their vertical structure play a positive role in reinforcing the low-frequency flow in the low levels. The moisture fluxes play a role in enhancing low-frequency flow by providing eddy-induced moisture convergence and divergence.
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ISSN
- 0930-7575
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URI
- https://sciwatch.kiost.ac.kr/handle/2020.kiost/4019
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DOI
- 10.1007/s00382-009-0606-8
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Bibliographic Citation
- CLIMATE DYNAMICS, v.35, no.6, pp.1011 - 1026, 2010
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Publisher
- SPRINGER
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Subject
- NORTH-ATLANTIC OSCILLATION; MIDLATITUDE STORM TRACKS; GEOPOTENTIAL HEIGHT; ZONAL INDEX; TELECONNECTION PATTERN; CIRCULATION ANOMALIES; TEMPERATURE-FIELDS; ARCTIC OSCILLATION; HEMISPHERE WINTER; ANNULAR MODES
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Type
- Article
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Language
- English
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Document Type
- Article
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