A study of heat transport in the sea in south of Honshu

本州南部海域热传输研究

基本信息

批准号：
63420015
负责人：
MAEDA Akio
金额：
$ 3.97万
依托单位：
Kagoshima University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (A)
财政年份：
1988
资助国家：
日本
起止时间：
1988 至 1989
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-63420015/
关键词：
Heat budget Surface mixed layer Kuroshio Heat content Surface buoy system Measurement of velocity Seasonal thermochine Main thermochine 係留電磁流速計熱量黒潮表面水温熱輸送水塊

项目摘要

Objects of our work are studies of heat budget and of mechanism maintaining heat content in a surface mixed layer of the sea in south of Honshu. The heat budget and the heat content in the mixed layer are obtained of meteorological and oceanorographical data. The mechanism is approached by measurements of Velocity and temperature.A test of a surface buoy moored to current meters and thermometers was carried out at a site in the Kagoshima bay in the summer. We had a chance to research on a process of developing of a surface mixed layer by strong wind of Typhoon 8911. The thickness of the mixed layer increases by 15m to 20m during half a day. The temperature in the mixed layer lowers by 4ﾟC for same period. The temperature at 40m from the sea surface rises by 6ﾟC.The measurements of velocity and temperature by the surface buoy system at St.T(29ﾟN,135ﾟE) were forced by approaching of Typhoon 8931 to reduce the measurement period from 8 days to only 20 hours.The temperature in the mixed la … More yer, Whose vertical distribution is keeping upside down, is slightly and gradually lowering for 20 hours. The seasonal and the main thermochines varies complexy with time. The temperature variations in each thermochine closely relate with each other. But there is little correlation between and in the main thermochine. There is also little vertical correlation along velocity variations. Vertical velocity at the bottom of the surface mixed layer is estimated at 1.9x 10 by B-spiral method.Heat content in surface layer of some regions in south of Honshu very slightly increases with time during 25 years between 1961 and 1985. Predominant period of the variations of the heat content is 8 to 10 years. Seasonal variations of SST around the Nansei Islands is influenced by the heat transport of Kuroshio and the phase of seasonal variations lags behind along Kuroshio.In the sea around the Islands, Unusual heat exchange between the sea and the atmosphere takes place in winter of 1963. The unusual heat exchange also takes place many times after 1980. Less

我们工作的对象是对热预算的研究和在洪斯南南部的海面混合层中保持热含量的机制。混合层中的热预算和热含量是通过气象和海洋数据获得的。通过测量速度和温度来接近该机理。我们有机会研究通过台风8911强风开发表面混合层的过程。混合层的厚度在半天内增加了15m至20m。混合层中的温度同一时期降低4 c。从海面40m处的温度上升6°C。通过接近Typhoon 8931的台面浮标系统（29 ﾟN，135埃）的表面浮标系统的速度和温度的测量，以将测量周期降低到8天，从8天降低到20小时。仅降低了较高的级别的温度。随着时间的流逝，季节性和主要热力体随时间变化。每种热力石的温度变化彼此密切相关。但是主要热力学之间和中间几乎没有相关性。沿速度变化几乎没有垂直相关性。通过b-Spiral方法估计表面混合层底部的垂直速度为1.9倍10。在1961年至1985年之间，在25年中，洪斯南（Honshu）南部某些区域的表面层的加热含量非常略有增加。热含量的主要变化时期为8至10年。 Nansei群岛周围SST的季节性变化受黑素岛的热运输和季节变化的阶段的影响。