台湾海峡夏季与冬季的水体及热盐通量观测  

The observation of transport of volume, heat and salt through the Taiwan Strait in summer and winter

作　　者：田川[1] 王树新[1] 徐霄阳[2] 

机构地区：[1]天津大学机械工程学院,天津300072 [2]中国海洋大学工程学院,山东青岛266100

出　　处：《海洋科学》2015年第1期110-115,共6页Marine Sciences

基　　金：国家自然科学基金(41006005)

摘　　要：利用在台湾海峡附近的下放式声学多普勒流速剖面仪(Lowered Acoustic Doppler Current Profiler,LADCP)观测资料和温盐观测资料,通过对连续站的两个季节观测进行正压和斜压潮流分析从而去除潮流得到准定常流,并在此基础上计算了南海和东海之间通过台湾海峡输运的水体及热盐通量。结果表明:台湾海峡大部分海域是半日潮海区(正规半日潮及不正规半日潮海区),半日潮主要分量为太阴半日分潮M2;台湾海峡的水体输运及热盐通量呈现明显的季节变化:夏季台湾海峡内表现为一支东北流向的海流,即台湾海峡暖流,存在3.3 Sv(1Sv=106 m3/s)的东北向水体输运,冬季东北季风较强,西南方向的海流加强,混合层可达到底部,存在1.8 Sv的东北向水体输运。与此对应的热盐通量分别为:夏季热通量为0.34×1015 W,盐通量为118.6×109 g/s;冬季热通量为0.14×1015 W,盐通量为72.9×109 g/s。该结果对台湾海峡通量的研究给出了一个直接观测的准确值,并为相关的数值研究提供了参考。Based on the Lowered Acoustic Doppler Current Profiler （LADCP） and Conductivity-Temperature-Depth （CTD） observation, this work examined the transport of volume, heat and salt through the Taiwan Strait in summer and winter. The barotropic and baroclinic tidal currents as well as the subinertial flow were obtained . The results show that the major area in the Taiwan Strait is typical of semi-diurnal tides and the most important component Lunar semidiurnal tidal, M2. The transport of water volume, flux of heat and salt through the Taiwan Strait was de-termined by seasons and there was a volume transport of 3.3 Sv （northeastward） in summer and 1.8 Sv （northeast-ward） in winter. In summer, the heat transport was 0.34×10^15 W, and salt transport was 118.6×10^9g/s. In winter, the heat transport was 0.14×10^15 W, and salt transport was 72.9×10^9g/s. These results provide an accurate flux value of the Taiwan Strait especially for the related research in this area.

关 键 词：台湾海峡 水体通量 热通量 盐通量 

分 类 号：P722.7[天文地球—海洋科学]