摘要
根据日本气象厅RyofuMaru调查船于 1 972～ 1 977和 1 989～ 1 990年间夏季在 1 55°E断面观测的水文资料 ,分析了该断面上北太平洋副热带海域 ( 1 8°～ 30°N)的主要水文要素———温度、盐度、密度、溶解氧含量和地转流等的分布特征及其与ENSO现象之间的关系。研究结果表明 ,上述诸要素的分布趋势是一致的 ,且与地转流场相对应。动力计算给出 ,在北太平洋副热带海域每年夏季均出现 2或 3支强、次强流或二者兼有的东、西向流动 ,并呈带状相间分布。东向流被称作副热带逆流。根据东、西向流带的数目推论 ,在该海域各年夏季可能存在 2个反气旋涡旋 ,即呈现 2个顺时针次级环流系统。
The hydrological data observed by the R/V Ryofu Maru of JMA along 155°E Section in the summers of 1972～1979 and 1989～1990, was used to study the ocean circulation and hydrological characteristics in the northern Pacific subtropical sea area. The distribution of water temperature, salinity, density, dissolved oxygen content, geostrophic current and their relationships with ENSO events were analyzed. It is found that the distribution tendencies of these parameters were similar and corresponded to the geostrophic current fields. Dynamical computation shows that there are 2～3 strong or sub strong currents or strong and sub strong eastward currents and westward currents, which present a zonal distribution and are alternately distribution. The eastward currents are named Subtropical Countercurrents. According to the number of the current belt in the area, it is deduced that about 2 anticyclonic eddies, that is 2 clockwise sub circulation systems, may occur every summer.
出处
《黄渤海海洋》
CSCD
2000年第2期8-17,共10页
Journal of Oceanography of Huanghai & Bohai Seas
基金
国家自然科学基金资助项目!( 495762 81 )
关键词
副热带海域
水文特征
环流系统
北太平洋
subtropical sea area
hydrological characteristic
eastward and westward currents
