Study on Dynamics of Kyucho

急鸟动力学研究

• 批准号: 10640420
• 负责人: MATSUYAMA Masaji
• 金额: $ 1.79万
• 依托单位: Tokyo University of Fisheries
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10640420/
• 关键词: Kyucho; Costally trapped wave; Dinsity current; Kuroshio; Typhoon; Internal Kelvin wave; Continental shelf wave; Semidiurnal internal tides; 黒潮流路変動; カップリング; 黒潮系水

Kyucho, coastal stormy current, often has destroyed the fishing set-net in Sagami Bay, located at the southeastern coast of the central Japan. We have tried to clarify dynamics of the coastal stormy current.On January 9, 1994, a Kyucho rushed along the Sagami Bay coast having the maximum velocity was 0.65msィイD1-1ィエD1 with a steep temperature rise, and the strong current continued for about half a day. NOAA-IR image showed the warm water intrusion of the Kuroshio water through the Oshima west channel and moving cyclonically along the coast. The behavior of the Kyucho is similar to that of the coastal density current in a rotating fluid. The Kyucho was suggested to occur during the transition period from the non-meander nearshore path of the Kuroshio to the non-large meander offshore path.Kyucho, on September 18, 1988, caused fishing set-net to drift 8km along the coast in the southward current. The temperature rise at 30m depth moves with speed of 0.6msィイD1-1ィエD1 cyclonically. which it almost agrees with the maximum current at the moored stations. The temperature variations at 60m depth are very similar to the sea-level variations on the Sagami Bay coast. The sea-level variations propagated at 2.1-2.5msィイD1-1ィエD1, trapped at the coast cyclonically. These phenomena are similar to the characteristics of coastally trapped waves, and appear to be generated by the warm water that is piled up the coast by Ekman transport of the strong southward wind stress associated with Typhoon 8818.

位于日本中部东南部海岸的相模湾，沿岸风暴流经常破坏渔网。我们试图弄清沿岸风暴流的动态。1994年1月9日，一艘急流冲过。相模湾海岸的最大流速为0.65毫秒，温度急剧上升，强流持续了大约半天，NOAA-IR图像显示海水温暖。黑潮水通过大岛西航道侵入并沿海岸进行气旋移动，其行为类似于旋转流体中的沿海密度流。 1988年9月18日，九潮使渔网在南流中沿海岸漂流8公里。 30m 深度的温度上升速度为 0.6ms，几乎与系泊站的最大水流一致。60m 深度的温度变化与相模湾海岸的海平面变化非常相似。水平变化以 2.1-2.5 毫秒传播，被捕获在海岸气旋中。沿海困波的特征，似乎是由与台风 8818 相关的强南向风应力的埃克曼输送而堆积在海岸上的温水产生的。

项目成果

I Wayan Nurjaya, M.Matsuyamaほか: "Distribution of low saline water near the mouth of Tokyo Bay."La mer. 37. 1-10 (1999)

我 Wayan Nurjaya，M.Matsuyama 等人：“东京湾口附近低盐水的分布”，La mer，37. 1-10 (1999)。

L. M. Radjawane, M. Matsuyama: "Modeling of density driven current in Tokyo Bay"Proceed. Oce. Internati. 99 Pacific Rim, Singapore. 345-353 (1999)

L. M. Radjawane、M. Matsuyama：“东京湾密度驱动电流建模”继续。

Senjyu S., M. Matsuyama ほか: "Interannual and decadal sea-level variations along the Japan coast"Journal Oceanogr.. 55. 619-633 (1999)

Senjyu S., M. Matsuyama 等人：“日本海岸的年际和年代际海平面变化” Journal Oceanogr.. 55. 619-633 (1999)

Suzuki,T.and M.Matsuyama: "Numerical Experiments on Wind-induced Circulation in Stratified Tokyo Bay,Japan." Estuary,Continental Shelf Science. (accept). (1999)

Suzuki,T. 和 M.Matsuyama：“日本东京湾分层风致环流的数值实验”。

Suzuki.T.and M.Matsuyama: "Numerical Experiments on Wind-induced Circulation in Stratified Tokyo Bay, Japan."Estuary Cont.Sc.St.Special Issue. 印刷中.

Suzuki.T. 和 M.Matsuyama：“日本东京湾分层风致环流的数值实验”。河口 Cont.Sc.St. 特刊已出版。