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利用1992年10月至2012年4月共19.5年的中尺度涡集研究南海中尺度涡的统计特征.南海中尺度涡呈东北—西南向分布,其中大多数涡旋向西移动并伴有经向偏移.受南海环流形式的影响,东向移动涡旋多发生于吕宋岛西南部和越南东部海域.涡旋发生的季节变化显示在台湾和吕宋岛西南部.气旋(反气旋)式涡多发于春(冬)季,在吕宋岛西北部和越南东南部,气旋式涡多发生于冬季,反气旋式涡分别多发于秋季和夏季.进一步的相关性分析表明,地转涡度与涡旋形成具有较强相关性,风应力能量输入对涡旋的影响有限.
The mesoscale eddies of 19.5 years from October 1992 to April 2012 were used to study the statistical characteristics of the mesoscale eddies in the South China Sea. The mesoscale eddies of the South China Sea are distributed from northeast to southwest, most of them migrate to the west accompanied by The migration of eastward vortex mostly occurred in the southwestern Luzon and the eastern Vietnam, influenced by the circulation pattern in the South China Sea. The seasonal variations of vortexes are shown in Taiwan and the southwestern part of Luzon. Cyclones (anticyclones) In the spring (winter) season, the vortex occurs frequently in winter in the northwest of Luzon Island and southeastern Vietnam, and the anticyclone vortex occurs in autumn and summer, respectively. Further correlation analysis shows that the orbiting vortex Degree and vortex formation are strongly correlated, and the effect of wind stress energy input on vortex generation is limited.