吕宋海峡浮标轨迹的拉格朗日拟序结构分析  

Lagrangian analysis of drifter trajectories near the Luzon Strait

作　　者：黄高龙 韦惺[1] 詹海刚[1] 

机构地区：[1]热带海洋环境国家重点实验室(中国科学院南海海洋研究所),广东广州510301 [2]中国科学院大学,北京100049

出　　处：《热带海洋学报》2015年第1期15-22,共8页Journal of Tropical Oceanography

基　　金：中国科学院战略性先导科技专项(A类)(XDA11020201);国家自然科学基金项目(41176162;41206071)

摘　　要：文章利用海表流速得到的拉格朗日拟序结构(Lagrangian coherent strctures,LCSs),并结合漂流浮标轨迹资料,分析吕宋海峡附近水域表层环流和水输运特征。结果显示,LCSs能够很好地描绘吕宋海峡附近水域的表层水体输运结构,解释了浮标运动轨迹的变化。冬季,吕宋海峡附近水域存在着条带状LCSs,以东南-西北走向由太平洋穿过吕宋海峡进入南海;夏季,跨海峡的LCSs在形态上转变为西南-东北走向,并由南海经吕宋海峡进入太平洋。LCSs形成的输运通道与壁垒揭示了吕宋海峡水交换季节变化的原因,太平洋与南海表层水主要沿着以上两种形态LCSs构成的输运通道进行交换。Drifter data and the Lagrangian coherent structures （LCSs） are used to discuss the upper-layer circulation and waterexchange near the Luzon Strait. Our results show that the LCSs, which are extracted from the surface currents, can depict thetransport structure of the study area, and explain the motion of drifters reasonably. There exist southeast-northwest orientatedLCSs, which extend from the Pacific Ocean to the South China Sea through the Luzon Strait during winter; during the summer,the orientation of those strait-crossing LCSs turns into southwest-northeast. The LCSs-formed transport pathways and barriersgive reasonable explanation of the seasonal tendency of water exchange in the Luzon Strait, and the two types of the LCSs actas the pathways of the surface water exchange between the Pacific Ocean and the South China Sea.

关 键 词：吕宋海峡 表层水交换 黑潮 漂流浮标 拉格朗日拟序结构 

分 类 号：P731.2[天文地球—海洋科学]