Year-to-year variation of cold waters around the korea strait     

Hong Sik Min  Young -Ho Kim  Cheol -Ho Kim 《Ocean Science Journal》2006,41(4):227-234

Year-to-year variation of bottom cold waters around the Korea Strait was investigated based on bottom temperatures measured by submarine telephone cable between Pusan, Korea and Hamada, Japan from 1982 to 1992. The characteristics of bottom temperatures could be divided into three different groups: the Korean side, the middle, and the Japanese side. Temperature drops in summer appeared in all the three regions implying the intrusion of cold waters into the Korea Strait. Significant decreases in the Korean side were observed in 1983, 1986, 1990, 1991, and 1992 when bottom temperatures were high in the middle. In contrast, bottom temperatures significantly decreased in the middle in 1985, 1988, and 1989 when the temperature drops in the Korean side were relatively small. This tendency for a negative relationship was also shown in the second mode of an EOF analysis. In the years when bottom temperatures significantly decreased in the Korean side, the cold water along the east coast of Korea expanded offshore and its temperature was low. On the contrary, cold water in the southern region of the Ulleung Basin developed in the years when bottom temperatures decreased considerably in the middle.  相似文献   

台湾海峡及两侧弧陆碰撞断裂系形成机制及其与地震活动关系   总被引：2，自引：0，他引：2  

李赶先 《台湾海峡》1996,15(1):81-85

本文利用三轴庆力椭球理论，探讨了台湾海峡春两侧弧陆碰撞断裂系的形成机制，结果表明：在台湾岛东部地应力椭球，δ１与δ２水平，而δ３垂直；在台海海峡及两侧，δ１与δ３水平，而δ２垂直。  相似文献   

台湾海峡中北部表层沉积物中介形类拟生态的研究     

蔡慧梅 《热带海洋学报》1993,(4)

台湾海峡中北部介形类共69属115种,受复杂的海底地形及海流、水团等环境因素影响,分为4个分布区:沿岸低值区,西南部高富集区,东北部密集区及中部过渡区。介形类属种以东海、南海组成的分子较多,显示出海流因素起主要作用。  相似文献   

台湾海峡西部海域营养盐时空变化与水文及生物因子的关系     

顾德宇  陈连志  郭水伙 《热带海洋学报》1992,(1)

本文报道了1984年5月至1985年2月台湾海峡西部海域(22°19′—27°25′N,116°30′—121°E)活性硅酸盐、磷酸盐和三氮总含量的平面、断面、垂直分布和季节变化及其与沿岸径流和海峡中不同水系的消长、上升流、浮游植物的关系,以及各营养盐之间及其与盐度的相关性。  相似文献   

渤海海峡区域现代沉积速率分布的数值计算   总被引：4，自引：0，他引：4       下载免费PDF全文

蒋东辉  高抒  李凤业 《海洋科学》2003,27(3):32-35

利用平面二维数值模型 ,计算了渤海海峡沉积速率的平面分布 ,计算结果与210Pb测年数据较为一致。渤海海峡中部泥区是现代泥质沉积区 (堆积速率<2mm/a) ,沉积速率分布趋势为南高北低 ;山东半岛北部近岸泥区的堆积速率在1mm/a以下。研究区西北部为海底冲刷区 ,其中渤海海峡北侧的老铁山水道附近为最强冲刷区 ,冲刷速率高达9mm/a。  相似文献   

台湾海峡微微型浮游植物的生态研究 Ⅱ. 类群组成、生长速率及其影响因子   总被引：6，自引：0，他引：6  

黄邦钦  洪华生  林学举  欧林坚 《海洋学报》2003,25(6):99-105

1997年8月、1998年2～3月和1998年8月,应用荧光显微镜、14C法分别测定了台湾海峡微微型浮游植物的类群组成和生长速率,探讨了该海域原绿球藻的存在及丰度问题.结果表明,在类群的丰度组成上,该海域以含藻红素的蓝细菌(PE细胞)占优势,平均为83%～93%(航次平均范围,下同),微微型真核浮游植物(EU细胞)次之,平均为7%～11%,含藻蓝素的蓝细菌(PC细胞)最少,平均为0%～6%;在碳生物量的组成上,PE细胞仍占优势,但其贡献率降低(52%～74%),EU细胞所占比例则升高(26%～44%).台湾海峡微微型浮游植物生长速率的变异性较大(0.52～2.25d-1),这可能与其所在测站的环境异质性(如营养盐的差异等)有关.采用叶绿素估算法证实该海域存在原绿球藻,其丰度介于107～108个/dm3之间,若将此考虑在内,在类群的丰度和生物量组成上,原绿球藻占优势(1998年8月碳生物量贡献率除外,为22%),丰度贡献率为63%～99%,碳生物量贡献率为60%～94%.  相似文献   

吐噶喇海峡黑潮流速结构和流量的研究     

林葵  汤毓祥  郭炳火 《海洋与湖沼》1995,26(3):247-253

利用1977－1991年日本“KuroshioExploitationandUtilizationResearch”（KER）资料和日本气象厅海洋观测资料计算吐噶喇海峡的黑潮流速和流量。结果表明，海峡处黑潮主轴的平均核心流速为92．0cm／s，平均流量为周．1×106m3/s；揭示了吐噶喇海峡黑潮流速的多核结构和多股流动的突出特征。探讨了海峡中流量分布状况和季节变化。  相似文献   

Calculation of currents in Taiwan Strait during summer Ⅰ. Three-dimensional diagnostic calculation     

Wang Huiqun  Yuan Yaochu 《海洋学报(英文版)》1997,16(4):441-457

Ｃａｌｃｕｌａｔｉｏｎ　ｏｆ　ｃｕｒｒｅｎｔｓ　ｉｎ　Ｔａｉｗａｎ　Ｓｔｒａｉｔ　ｄｕｒｉｎｇ　ｕｍｍｅｒⅠ．Ｔｈｒｅｅ－ｄｉｍｅｎｓｉｏｎａｌ　ｄｉａｇｎｏｓｔｉｃ　ｃａｌｃｕｌａｔｉｏｎTXＣａｌｃｕｌａｔｉｏｎｏｆｃｕｒｒｅｎｔｓｉｎＴａｉｗａｎ...  相似文献   

台湾海峡—种三维风海流数值计算模式     

陆凤山  廖康明  沈敏敏 《台湾海峡》1997,(4)

本文根据浅海风海流基础理论，采用数值计算方法，对台湾海峡的风海流流场进行了三维数值模拟，讨论了台湾海峡特征季风情况下风海流流场的水平结构及垂直分布。本模式值得进一步研究和完善。  相似文献   

Numerical Study of the Generation and Propagation of Trigger Meanders of the Kuroshio South of Japan     

Takahiro Endoh  Toshiyuki Hibiya 《Journal of Oceanography》2000,56(4):409-418

We examine the processes underlying the generation and propagation of the small meander of the Kuroshio south of Japan which occurs prior to the transition from the non-large meander path to the large meander path. The study proceeds numerically by using a two-layer, flat-bottom, quasi-geostrophic inflow-outflow model which takes account of the coastal geometries of Kyushu, Nansei Islands, part of the East China Sea, and the Izu Ridge. The model successfully reproduces the observed generation and propagation features of what is called "trigger meander" until it passes by Cape Shiono-misaki; presumably because of the absence of the bottom topography, the applicability of the present numerical model becomes questionable after the trigger meander passes by Cape Shiono-misaki. The generation of the trigger meander off the south-eastern coast of Kyushu is shown to be associated with the increase in the supply of cyclonic vorticity by the enhanced current velocity in the upper layer along the southern coast of Kyushu where the no-slip boundary condition is employed. Thereafter, the trigger meander propagates eastward while inducing an anticyclone-cyclone-cyclone pair in the lower layer. The lower-layer cyclone induced in this way, in particular, plays a crucial role in intensifying the trigger meander trough via cross-stream advection in the upper layer; the intensified trigger meander trough then further amplifies the lower-layer cyclone. This joint evolution of the upper-layer meander trough and the lower-layer cyclone indicates that baroclinic instability is the dominant mechanism underlying the rapid amplification of the eastward propagating trigger meander.  相似文献