【摘要】：為了合理有效地分析和挖掘海洋渦旋移動數(shù)據(jù)中的規(guī)律和模式,本文以基于空間交互性流聚類的區(qū)域化方法為基礎(chǔ),提出了一種海洋渦旋移動特征的網(wǎng)格區(qū)域化方法。該方法以網(wǎng)格為統(tǒng)計單元,對渦旋移動數(shù)據(jù)進行組織,通過圖論模型構(gòu)建海洋渦旋的移動網(wǎng)絡(luò)圖,然后采用基于平均鄰接的層次聚類和基于模塊度的劃分2個步驟,實現(xiàn)渦旋移動特征的區(qū)域劃分。基于該算法,對1992-2011年中國南海海洋渦旋移動數(shù)據(jù)進行算法實驗,結(jié)果表明,南海海洋渦旋按照其移動頻繁性特征可分為越南東南部(R1)、越南東部-巴拉望島(R2)、南海北部(R3)3個區(qū)域。其中,R1區(qū)域包含了南海西南部深海盆地區(qū)的渦旋活躍條帶;R2區(qū)域體現(xiàn)了南海中部渦旋向西移動的活動規(guī)律;R3區(qū)域則包含了南海北部東北-西南走向條帶。3個區(qū)域內(nèi)冷渦和暖渦具有明顯的季節(jié)性變化特征:R1和R3區(qū)域冷暖渦變化相似,暖渦在夏秋季移動最多,冬季最少,而冷渦則相反,夏秋季移動最少,隨后逐漸增加,并在春季達到峰值;R2區(qū)域暖渦在春季移動最多,而冷渦在夏冬移動最多,春秋移動相對較弱。
[Abstract]:In order to analyze and mine the rules and patterns of ocean vortex moving data reasonably and effectively, this paper proposes a grid regionalization method based on spatial interaction flow clustering. In this method, the grid is used as the statistical unit to organize the vortex moving data, and the moving network map of the ocean vortex is constructed by the graph theory model, and then the hierarchical clustering based on average adjacency and the partition based on the module degree are adopted. The region division of vortex movement feature is realized. Based on this algorithm, the ocean vortex movement data of the South China Sea from 1992 to 2011 are tested. The results show that the sea vortex in the South China Sea can be divided into southeastern Vietnam (R1), Eastern Vietnam and Palawan Island (R2) according to its frequent moving characteristics. Three regions in the northern part of the South China Sea (R3). Among them, the R1 region contains the active vortex belt in the deep sea basin of the southwest South China Sea, and the R2 region reflects the westward movement of the vortex in the middle of the South China Sea. The R3 region contains a stripe of northeast to southwest strike in the north and southwest of the South China Sea. The cold and warm vortices in the three regions have obvious seasonal variation characteristics: the cold and warm vortices in the R1 and R3 regions are similar, and the warm vortices move most in summer and autumn and the least in winter. On the contrary, the cold vortex moved least in summer and autumn, then increased gradually, and reached its peak in spring. The warm vortex in R2 region moved most in spring, but the cold vortex moved most in summer and winter, but the movement in spring and autumn was relatively weak.
【作者單位】： 中國科學院地理科學與資源研究所資源與環(huán)境信息系統(tǒng)國家重點實驗室;中國科學院大學;
【基金】：國家自然科學基金項目“基于海洋要素場的渦旋過程數(shù)據(jù)建模與可視化”(41371378);國家自然科學基金創(chuàng)新群體項目“地理時空數(shù)據(jù)分析”(41421001)
【分類號】：P731.2

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