Sectional distribution of salinity and its indication of Kuroshio'sintrusion in the southern Taiwan Strait and northeastern South China Sea late summer, 1994

Using the CTD data investigated at about 330 stations in the southern Taiwan Strait, the northeastern South China Sea and their adjacent seas in August and September of 1994, this paper anayses the sectional distributions of salinity in 10 selected sections and discusses the possibility of the Kuroshio's intrusion into the northeastern South China Sea and the southern Taiwan Strait. The results show that: as the main stream of Kuroshio passes by the northern Luzon Strait during the survey period, the 'Kuroshio-influenced water' with some hydrological features of the Kuroshio may extend through the Luzon Strait to the sea areas near both the Dongsha Islands and the Taiwan Shoal of the southern Taiwan Strait.

Distributional features of temperature and salinity in the southern Taiwan Strait and its adjacent sea areas in late summer, 1994

Based on the CTD data obtained in the southern Taiwan Strait and its adjacent areas in August and September of 1994, the distributional features of the temperature and salinity in the studied area have been analyzed in detail. The results are as follows: (1) There are two low temperature and high salinity regions in the nearshore area between Dongshan and Shantou and in the southeastern Taiwan Shoal, respectively, which may be caused by upwellings. (2) There exists a cold eddy in the northwestern sea area and a warm eddy with two high temperature cores in the eastern sea area of the Dongsha Islands, which are related to the anti-cyclonic turning of the seawater near the Dongsha Islands. (3) A westward high temperature and high salinity water tongue extends through the northern Luzon Strait and reaches the sea areas near the Dengsha Islands and southern Taiwan Strait.

台湾浅滩大型沙波、潮流结构和推移质输运特征

对2006年8月所获台湾浅滩的底质、水深、多层位流速、流向以及CTD观测数据进行了分析，探讨了台湾浅滩大型沙波区水流的时空分布特征、沉积物输运过程及影响因素，结果表明，台湾浅滩动力作用较强，底质为粗砂，其上发育的沙波波长为325-822 m，波高为14.4-20.3 m，较接近由前人总结的沙波波高、波长的关系式计算出的波高和波长。沙波波峰、波谷、迎水面和背水面流速以12.5 h为周期沿顺时针方向旋转；底部最大流速出现在半日潮周期的同一时段，对应的方向均为偏南方向，且沙波迎水面的流速大于背水面的。在两个半日潮过程中研究区域的沉积物输入量大于输出量，处于淤积状态。在潮流作用下沉积物输运量较少，沙波脊线移动较小，而台湾浅滩有较大规模的沙波运动，故认为改造沙波的主要作用力应该是风暴流。在观测的断面中涨潮推移质输运量大于落潮的，且第一个半日潮涨落潮的输运能力均较第二个半日潮的大，这可能与潮流的流速-时间不对称特征及潮能变化形式有关。

台湾海峡南部1997年8月实测潮、余流特征

根据１９９７年８月中旬台湾浅滩东南部和南部两个多周日定点连续观测站的海流和ＣＴＤ实测资料，分析了该海区调查期间的半日潮流、余流的特征．结果表明：该海区潮流为不正规半日潮流，并且半日潮流与潮位的关系和驻波的某些性质相符；同时上、下层海流具有不同性质，其中台湾浅滩东南部测站位于锋面所在处，表层海流流速达６５．５ｃｍ／ｓ，流向ＥＮＥ．

夏季台湾海峡南部海区的海流结构

本文根据台湾海峡南部海区夏季的海流调查资料,参考温、盐、密度等的历史资料和有关方面的研究成果,论述了表层、中层和下层的海流结构。结果表明,南海暖流继续沿着海区中部向东北延伸,但在粤东、闽南近岸的表层这支海流还受到沿岸低盐海水的影响;而黑潮南海分支北段的边缘部分可以影响到本海区的南部海域,这一部分还可能有一支流分出并沿着台湾岛西岸北上。