Direct Measurements of Deep Currents in the Northern Japan Sea
Direct Measurements of Deep Currents in the Northern Japan Sea
复制标题
北日本海深海流的直接测量
DOI：
10.1023/a:1007842013257
复制
发表时间：
1999
影响因子：
2.3
通讯作者：
Y. Volkov
中科院分区：
文献类型：
--
作者：
M. Takematsu;Z. Nagano;Alexander G. Ostrovski;Kuu Kim;Y. Volkov
在日本海北部的日本海盆地的七个地点，首次通过地下系泊进行了长期的海流测量。其目的是直接探测深度在500m以下的高度均匀的深水团(日本海本身水域)中的速度场。在每个系泊设备上，在深度约1000m以下的大致相等的距离上配备三个测流仪。测量的持续时间为1-3年，具体取决于特定的地点。本文描述了系泊测量的基本数据集。研究发现，日本盆地的深水能量很强，涡旋和垂直一致流的量级为0.1m/S，令人惊讶的是，即使在盆地的最深层，洋流和涡旋也表现出很强的季节相关性。文中还讨论了观测到的新的海流特征，并与常规的水文深环流图像进行了比较。
Long-term current measurements by means of subsurface moorings were made for the first time at seven sites in the Japan Basin, the northern part of the Japan Sea. The objective was to directly explore the velocity field in the highly homogeneous deep water mass (the Japan Sea Proper Water) that occupies depths below 500 m. On each mooring three current meters were equipped at an approximately equal distance below about 1000 m depth. Duration of the measurements was 1 to 3 years depending on specific site. This paper describes the basic data set from the moored measurements. It is found that the deep water of the Japan Basin is very energetic with eddies and vertically coherent currents of the order of 0.1 m/s. Surprisingly, the currents and eddies exhibit strong seasonal dependence even in the deepest layers of the Basin. The observed new current features are discussed in comparison with conventional deep circulation pictures derived from hydrographic data.