摘要
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.
A dataset of mesoscale eddies from October 1992 to April 2012 is used to study eddies in South China Sea（ SCS）. Eddies mainly generate along northeast-southwest direction in SCS and most of them prefer a westward propagation with meridional deflections. Eastward propagating eddies occur more frequently on the southwest of Luzon and the east of Vietnam,and are mainly controlled by the circulation in SCS. Seasonal variations of eddy distribution show inconsistent characteristics in different regions of SCS. Cyclonic（ anticyclonic） eddies prefer to occur during spring（ winter） on the southwest of Taiwan and southwest of Luzon. While in the northwest of Luzon and southeast of Vitnam,cyclonic eddies prefer winter and anticyclonic eddies more likely in autumn and summer,respectively. Correlation analysis shows that wind stress curl can hardly benefit the formation of eddies directly while the geographic vorticity plays a significant role.
出处
《中国科学院大学学报（中英文）》
CSCD
北大核心
2016年第1期97-106,共10页
Journal of University of Chinese Academy of Sciences
基金
Supported by the National Science Foundation of China（41275064,41475072,and 41175057）
关键词
南海
中尺度涡
季节变化
空间变化
South China Sea
mesoscale eddy
seasonal variation
spatial variation
