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Extraction of Spatial-temporal Rules from Mesoscale Eddies in the South China Sea Based on Rough Set Theory : Volume 8, Issue 3 (14/06/2011)

By Du, Y.

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Book Id: WPLBN0003988230
Format Type: PDF Article :
File Size: Pages 40
Reproduction Date: 2015

Title: Extraction of Spatial-temporal Rules from Mesoscale Eddies in the South China Sea Based on Rough Set Theory : Volume 8, Issue 3 (14/06/2011)  
Author: Du, Y.
Volume: Vol. 8, Issue 3
Language: English
Subject: Science, Ocean, Science
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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He, Z., Fan, X., Zhou, C., Wang, D., Su, F., Du, Y., & Mao, H. (2011). Extraction of Spatial-temporal Rules from Mesoscale Eddies in the South China Sea Based on Rough Set Theory : Volume 8, Issue 3 (14/06/2011). Retrieved from

Description: State Key Laboratory of Resources and Environmental Information System, Institute of Geographic Science and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China. 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. Spatial-temporal rules of typical states in the SCS are extracted as three decision attributes, which then are confirmed by the previous works. The results demonstrate that this approach is effective in extracting spatial-temporal rules from typical mesoscale-eddy states, and therefore provides a powerful approach to forecasts in the future. 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-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 future study.

Extraction of spatial-temporal rules from mesoscale eddies in the South China Sea Based on rough set theory

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