吕宋海峡海域黑潮对近惯性内波传播的调制作用研究  

Modulation of the Kuroshio on Near-Inertial Internal Waves Induced by Typhoons Observed near the Luzon Strait

作　　者：廖晓娴 许行 黄晓冬[3,4] 桑康凯 Liao Xiaoxian;Xu Xing;Huang Xiaodong;Sang Kangkai(College of Oceanic and Atmospheric Sciences,Ocean University of China,Qingdao 266100,China;Qingdao Joint Institute of Marine Meteorology,Qingdao 266034,China;Sanya Ocean Institute,Ocean University of China,Sanya 572025,China;Frontiers Science Center for Deep Ocean Mutispheres and Earth System,Key Laboratory of Physical Oceanography,Ministry of Education,Ocean University of China,Qingdao 266100,China)

机构地区：[1]中国海洋大学海洋与大气学院,山东青岛266100 [2]青岛海洋气象研究院,山东青岛266034 [3]中国海洋大学三亚海洋研究院,海南三亚572025 [4]中国海洋大学深海圈层与地球系统前沿科学中心,物理海洋教育部重点实验室,山东青岛266100

出　　处：《中国海洋大学学报（自然科学版）》2025年第1期13-24,共12页Periodical of Ocean University of China

基　　金：海南省科技计划三亚崖州湾科技城联合项目(120LH018);国家自然科学基金项目(41976008)资助。

摘　　要：本文基于2010年8月—2011年4月吕宋海峡黑潮两侧潜标观测的流速数据,研究了台风引起的近惯性内波在黑潮调制下的传播特征。观测结果表明,台风“鲇鱼”经过吕宋海峡附近后,上层海洋有强烈的近惯性内波生成,最大近惯性流速达到0.4 m·s^(-1),黑潮东侧(太平洋)的最大近惯性动能比西侧(南海)的强2~3倍。这种空间差异与风能输入不一致,黑潮东侧的风功要弱于西侧。流速和剪切的功率谱分析结果显示,台风“鲇鱼”期间黑潮东侧明显的上层近惯性谱峰的频率在黑潮东侧明显低于黑潮西侧。黑潮形态变化引起的相应流场和涡度场变化能够对近惯性内波传播进行调制。射线追踪实验结果表明,黑潮的平流作用可以使近惯性内波远离源地,其流轴西侧正涡度阻碍近惯性内波传播,而其东侧负涡度可以使近惯性内波聚集。该结果所揭示的近惯性内波的传播过程和分布特征可为理解全球海洋近惯性内波的再分配问题提供思路。Based on the velocity data near the Kuroshio in the Luzon Strait from August 2010 to April 2011,the propagation characteristics of near-inertial internal waves(NIWs)induced by typhoons under the Kuroshio modulation are studied.The results show that during the passage of Typhoons Megi,there was strong NIWs generation in the upper layer,and the maximum near-inertial velocity reached 0.4 m·s^(-1).The maximum near-inertial kinetic energy on the east side of Kuroshio(Pacific Ocean)was 2~3 times stronger than that on the west side(South China Sea).This spatial difference is inconsistent with the wind energy input.During Typhoon Megi,the wind energy on the eastern side of Kuroshio was weaker than that on the western side.The results of velocity and shear power spectrum analysis show that the upper near-inertial spectrum peak on the east side of Kuroshio is significantly redshifted compared with that on the west side.The NIWs’propagation can be modulated by the corresponding currents and vorticity field changes caused by the Kuroshio morphology.According to the results of ray tracing experiments,the advection effect of Kuroshio transported the NIWs far from the source.The positive vorticity on the west side of the current axis hindered the propagation of the NIWs.In contrast,the negative vorticity on the east side could make the NIWs gather.

关 键 词：吕宋海峡 近惯性内波 台风 黑潮 射线追踪 

分 类 号：P731.24[天文地球—海洋科学]