Observation of the Sea Surface in Southwest East China Sea by Sensor Network

东海西南海面传感器网络观测

• 批准号: 17360240
• 负责人: KOJIMA Shoichiro
• 金额: $ 11.03万
• 依托单位: National Institute of Information and Communications Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2005
• 资助国家: 日本
• 起止时间: 2005 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-17360240/
• 关键词: Remote Sensing; Sensor Network; Ocean Radar; GPS Buoy; Microstructure Profiler; Sea Surface Currents Measurement; Kuroshio; Ocean Wave Measurement; 漂流ブイ; 広域波浪計測; 海水交換

Kuroshio, where flows in southwest East China Sea, and other nearby currents are continuously observed by 9.25MHz Ocean Radar. By this observation, it is clarified that Kuroshio has two current patterns, and the eddy structure between the Kuroshio and Yaeyama Islands appeals to be caused by the clockwise and counterclockwise eddies caused by Yonaguni Island. The spatial scale of these eddies is between 30 and 100 km, and the traveling speed of these eddies is between 15 and 30 km/day. In addition, it is clarified that the abnormal sea level at Ishigaki and Yonaguni Islands depends on the variation of Kuroshio by comparing the current patterns of Kuroshio with the sea level at these Islands.The sea surface currents in Sekiseishoukou and other nearby currents are observed by 24.515MHz Ocean Radar. By this observation, it is clarified the current pattern in and around Sekiseishoukou and the interaction between Sekiseishoukou and offshore (East China Sea and Pacific Ocean).The transport of coral larval born in Sekiseishoukou is observed by GPS buoy. By this observation, it was clarified that lots of coral larval settle on the sea bottom around Ishigaki and Iriomote Islands. In addition, it was clarified the possibility that some coral larval settle on the sea bottom around Miyako Island by Kuroshio and other nearby currents.The vertical microstructure in the sea surface layer in and around Sekiseishoukou was observed by the Micro-scale profiler By this observation, supply of turbulence to the sea surface due to wind or wind wave seemed to be cause of this vertical mixing in the surface layer, because as wind blew up, turbulence in the sea surface layer spread to 10 m depth. And 50cm/s of horizontal mean velocity in the sea surface was relatively fast.

9.25MHz海洋雷达持续观测到流经东海西南部的黑潮和附近的其他海流。通过这次观察，明确了黑潮有两种潮流模式，黑潮和八重山群岛之间的涡流结构似乎是由与那国岛引起的顺时针和逆时针涡流造成的。这些涡流的空间尺度在30至100公里之间，这些涡流的行进速度在15至30公里/天之间。此外，通过将黑潮的当前模式与这些岛屿的海平面进行比较，明确了石垣岛和与那国岛的海平面异常取决于黑潮的变化。 关成翔港和其他附近海流是通过24.515MHz海洋雷达观测到的。通过这次观测，明确了关成松口及其周边地区的现状以及关成松口与近海（东海和太平洋）之间的相互作用。通过GPS浮标观测在关成松口出生的珊瑚幼虫的迁移情况。通过这次观察，明确了石垣岛和西表岛周围的海底栖息着大量的珊瑚幼虫。此外，还澄清了一些珊瑚幼虫在黑潮和其他附近海流的作用下沉积在宫古岛周围海底的可能性。通过微尺度剖面仪观察了积成翔口及其周围海表层的垂直微观结构。通过这次观察，由于风或风浪向海面提供湍流，这似乎是表层垂直混合的原因。 向上，海面层的湍流蔓延至10 m 深度。海面水平平均速度50cm/s，是比较快的。

项目成果

「研究成果報告書概要(和文)」より

摘自《研究结果报告摘要（日文）》

• 发表时间: 2005
• 作者: Kawauchi;et. al.;Nishimura et al.;Dezawa et al.;Yoshizawa et al.;星野 幹雄;星野 幹雄
• 通讯作者: 星野 幹雄

Comparison of Surface Currents measured by 9.5MHz and 24.5MHz Ocean Radars

9.5MHz和24.5MHz海洋雷达测量的表面电流比较

• 发表时间: 2006
• 期刊: Proc. of the 41st Conference of the Remote Sensing Society of JAPAN
• 作者: 林山泰久;他(分担執筆) 国土交通省鉄道局 監修;Yasuhisa Hayashiyama;児島 正一郎;Kaoru Ichikawa;Shoichiro Kojima;Kaoru Ichikawa;児島 正一郎;Shoichiro Kojima;児島 正一郎;鹿島 基彦;長尾 正之;Masayuki Nagao;長尾正之;Shoichiro Kojima;Shoichiro Kojima;Motohiko Kashima;Masayuki Nagao;Masayuki Nagao;Masayuki Nagao;Shoichiro Kojima;児島 正一郎;鹿島 基彦;Masayuki Nagao;Ryoko Tokeshi;長尾正之;鹿島基彦;Shoichiro Kojima;Shoichiro Kojima;児島正一郎;Motohiko Kashima
• 通讯作者: Motohiko Kashima

Evaluating Effectiveness of 9.25MHz Ocean Radar in Measuring Ocean Waves

评估 9.25MHz 海洋雷达测量海浪的有效性

• 发表时间: 2006
• 期刊: Proc. IEEE International Geoscience and Remote Sensing Symposium
• 作者: 林山泰久;他(分担執筆) 国土交通省鉄道局 監修;Yasuhisa Hayashiyama;児島 正一郎;Kaoru Ichikawa;Shoichiro Kojima;Kaoru Ichikawa;児島 正一郎;Shoichiro Kojima;児島 正一郎;鹿島 基彦;長尾 正之;Masayuki Nagao;長尾正之;Shoichiro Kojima;Shoichiro Kojima;Motohiko Kashima;Masayuki Nagao;Masayuki Nagao;Masayuki Nagao;Shoichiro Kojima;児島 正一郎;鹿島 基彦;Masayuki Nagao;Ryoko Tokeshi;長尾正之;鹿島基彦;Shoichiro Kojima;Shoichiro Kojima;児島正一郎;Motohiko Kashima;Shoichiro Kojima
• 通讯作者: Shoichiro Kojima

Wave measurements under the typhoon by 9.25-MH_z ocean radar

9.25-MH_z海洋雷达台风下波浪测量

• 发表时间: 2007
• 期刊: Proc.IEEE International Geoscience and Remote Sensing Symposium
• 作者: 林山泰久;他(分担執筆) 国土交通省鉄道局 監修;Yasuhisa Hayashiyama;児島 正一郎;Kaoru Ichikawa;Shoichiro Kojima;Kaoru Ichikawa;児島 正一郎;Shoichiro Kojima
• 通讯作者: Shoichiro Kojima

Observation of the Mixing Phenomenon of the fast sea surface currents in the coast by Ocean Radar and a Micro scale Pofiler

海洋雷达和微尺度Pofiler观测海岸快速海流混合现象

• 发表时间: 2007
• 期刊: Annual Journal of Hydraulic Engineering Vol.51 No.2
• 作者: 林山泰久;他(分担執筆) 国土交通省鉄道局 監修;Yasuhisa Hayashiyama;児島 正一郎;Kaoru Ichikawa;Shoichiro Kojima;Kaoru Ichikawa;児島 正一郎;Shoichiro Kojima;児島 正一郎;鹿島 基彦;長尾 正之;Masayuki Nagao;長尾正之;Shoichiro Kojima;Shoichiro Kojima;Motohiko Kashima;Masayuki Nagao;Masayuki Nagao;Masayuki Nagao
• 通讯作者: Masayuki Nagao