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| Titel |
Extraction of spatial-temporal rules from mesoscale eddies in the South China Sea based on rough set theory |
| VerfasserIn |
Y. Du, X. Fan, Z. He, F. Su, C. Zhou, H. Mao, D. Wang |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1812-0784
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| Digitales Dokument |
URL |
| Erschienen |
In: Ocean Science ; 7, no. 6 ; Nr. 7, no. 6 (2011-12-07), S.835-849 |
| Datensatznummer |
250004874
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| Publikation (Nr.) |
 copernicus.org/os-7-835-2011.pdf |
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| Zusammenfassung |
| In this paper, a rough set theory is introduced to
represent spatial-temporal relationships and extract the corresponding
rules from typical mesoscale-eddy states in the South China Sea (SCS). Three
decision attributes are adopted in this study, which make the approach
flexible in retrieving spatial-temporal rules with different features. The
results demonstrate that this approach is effective, and therefore provides
a powerful approach to forecasts in the future studies. Spatial-temporal
rules in the SCS indicate that warm eddies following the rules are generally
in the southeastern and central SCS around 2000 m isobaths in winter. Their
intensity and vorticity are weaker than those of cold eddies. They usually
move a shorter distance. By contrast, cold eddies are in 2000 m and deeper
regions of the southwestern and northeastern SCS in spring and fall. Their
intensity and vorticity are strong. Usually they move a long distance. In
winter, a few rules are followed by cold eddies in the northern tip of the
basin and southwest of Taiwan Island rather than warm eddies, indicating
cold eddies may be well-regulated in the region. Several warm-eddy rules are
achieved west of Luzon Island, indicating warm eddies may be well-regulated
in the region as well. Otherwise, warm and cold eddies are distributed not
only in the jet flow off southern Vietnam induced by intraseasonal wind
stress in summer-fall, but also in the northern shallow water, which should
be a focus of a future study. |
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