EXTRACTING THE SPATIAL-TEMPORAL RULES OF THE MESOSCALE OCEAN EDDIES IN THE SOUTH CHINA SEA BASED ON ROUGH SETS

摘要

Many different types of Mesoscale Ocean Eddies have been found in China's coastal and offshore since the 1970s. Domestic and foreign scholars are holding ongoing in-depth investigation and research in the South China Sea, especially since the TOPEX / Poseidon (T / P) data have been widely used. Due to the complex causes and numerous affecting factors of the Mesoscale Ocean Eddies in the South China Sea, the methods such as numerical simulation, quantitative statistics post limitations in analyzing the spatial-temporal relationships. This paper adopts rough sets theory to express the spatial-temporal relationships of the Mesoscale Ocean Eddies in the South China Sea, without adding any a priori information. Firstly, the paper extracts spatial-temporal rules of the Mesoscale Ocean Eddies in the South China Sea, by using the extracted eddy data from the remote sensing image. The decision making attributes respectively are sea area, time, and the eddy type. Then, the paper describes specific characters of the Mesoscale Ocean Eddies respectively from time and space, as well as the types. The results suggest this method effectively extracted the spatial-temporal rules of the Mesoscale Ocean Eddies from multi-source data sets, thus efficient support an in-depth understanding of the phenomenon of Mesoscale Ocean Eddies.