龙目和翁拜海峡海流季节内变化特征与机制分析  

Intraseasonal Variation of the Throughflow in the Lombok Strait and Ombai Strait and Its Driven Mechanism

作　　者：赵海峰 徐腾飞 官晟 王冠琳 滕飞 李淑江 曹国娇 ZHAO Haifeng;XU Tengfei;GUAN Sheng;WANG Guanlin;TENG Fei;LI Shujiang;CAO Guojiao(First Institute of Oceanography,MNR,Qingdao 266061,China;Laboratory for Regional Oceanography and Numerical Modeling,Laoshan Laboratory,Qingdao 266237,China;Navigation College,Jiangsu Maritime Institute,Nanjing 211100,China)

机构地区：[1]自然资源部第一海洋研究所,山东青岛266061 [2]崂山实验室区域海洋动力学与数值模拟功能实验室,山东青岛266237 [3]江苏海事职业技术学院航海技术学院,江苏南京211100

出　　处：《海洋科学进展》2024年第1期21-37,共17页Advances in Marine Science

基　　金：崂山实验室科技创新项目(LSKJ202202700);国家自然科学基金面上项目(42076023)。

摘　　要：基于INSTANT(International Nusantara Stratification And Transport)观测资料的分析,龙目和翁拜海峡不同深度流量的季节内变化具有不同的显著周期。根据这一特征,龙目海峡水体输送可分为150 m以浅和150~300 m两层,其显著周期分别为30~70 d和30~40 d,前者由第二斜压模Kelvin波引起,而后者受第一斜压模Kelvin波影响;翁拜海峡水体输送可分为4层,300 m以浅为准40 d和50~75 d振荡,300~600 m为30~45 d和55~75 d振荡,600~1 000 m为30~40 d、准50 d、60~75 d振荡,1 000~1 200 m为30~40 d振荡以及较弱的20 d以下高频振荡。起源于赤道中印度洋的季节内Kelvin波的传播过程是引起龙目和翁拜海峡海洋季节内变化的重要因素,它在水平向东传播的同时,在垂直方向也会引起位相的传播,且率先抵达深层。据估算,海洋季节内变化从赤道中印度洋传播至龙目和翁拜海峡的速度约为1.59~2.95 m/s,由第一和第二斜压模Kelvin波构成。苏门答腊-爪哇岛沿岸风对季节内Kelvin波的传播也有重要影响。Power spectrum analysis of INSTANT data shows that transport throughflow the Lombok and Ombai Straits at different depth are subjected to different significant periods,according to which the Lombok and Ombai transports can divided into independent layers.The Lombok transport is divided as 0-150 m and 150-300 m layers,with significant periods at 30-70 and 30-40 days,respectively.The Ombai transport is divided as four layers,with significant period at around 40 days and 50-75 days for the upper 300 m,30-45 days and 55-75 days at 300-600 m layer,30-40 days,quasi-50 and 60-75 days at 600-1000 m layer,and 30-40 days beneath 1000 m.The ISVs in Lombok and Ombai Straits are attributed to the propagation of intraseasonal Kelvin waves that derived from the equatorial Indian Ocean.Since the Kelvin waves arrive at greater depth during the propagation,the vertical distribution of transport series at each straits show upward phase propagation.The phase speed of ISVs propagating from the equatorial Indian Ocean to Lombok and Ombai Straits are estimated between 1.59 and 2.95 m/s,which are composed of the first and second baroclinic modes of Kelvin wave.Along shore wind anomalies at intraseasonal band along the Lesser Sunda Islands are suggested to have influence on the propagation of the intraseasonal Kelvin waves.

关 键 词：印度尼西亚贯穿流 INSTANT 季节内变化 KELVIN波 

分 类 号：P731[天文地球—海洋科学]