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| Titel |
A clustering analysis of eddies' spatial distribution in the South China Sea |
| VerfasserIn |
J. Yi, Y. Du, X. Wang, Z. He, C. Zhou |
| 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 ; 9, no. 1 ; Nr. 9, no. 1 (2013-02-22), S.171-182 |
| Datensatznummer |
250018001
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| Publikation (Nr.) |
 copernicus.org/os-9-171-2013.pdf |
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| Zusammenfassung |
| Spatial variation is important for studying the mesoscale eddies in the South
China Sea (SCS). To investigate such spatial variations, this study made a
clustering analysis on eddies' distribution using the K-means approach.
Results showed that clustering tendency of anticyclonic eddies (AEs) and
cyclonic eddies (CEs) were weak but not random, and the number of clusters
were proved greater than four. Finer clustering results showed 10 regions
where AEs densely populated and 6 regions for CEs in the SCS. Previous
studies confirmed these partitions and possible generation mechanisms were
related. Comparisons between AEs and CEs revealed that patterns of AE are
relatively more aggregated than those of CE, and specific distinctions were
summarized: (1) to the southwest of Luzon Island, AEs and CEs are generated
spatially apart; AEs are likely located north of 14° N and closer to
shore, while CEs are to the south and further offshore. (2) The central SCS
and Nansha Trough are mostly dominated by AEs. (3) Along 112° E,
clusters of AEs and CEs are located sequentially apart, and the pairs off
Vietnam represent the dipole structures. (4) To the southwest of the Dongsha
Islands, AEs are concentrated to the east of CEs. Overlaps of AEs and CEs in
the northeastern and southern SCS were further examined considering seasonal
variations. The northeastern overlap represented near-concentric
distributions while the southern one was a mixed effect of seasonal
variations, complex circulations and topography influences. |
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