大洋环流的诊断计算(英文)

• 作 者: 杨阳 周伟东 董丹鹏
• 机 构: 国家海洋局南海分局工程勘察中心,中国科学院南海海洋研究所热带海洋环境动力学重点实验室,
• 出 处: Marine Science Bulletin
• 发表日期: 2010年01期
• 关键词: 大洋环流 流函数 南极绕极流 诊断模型 动力计算 湾流 northward ocean 高分辨率 eastward

采用二维的全球高分辨率(1/4°×1/4°)的自由表面诊断模型结合动力计算估算全球大洋环流,模拟结果与其他模拟结果非常相似。流函数的分布表明,全球大洋中的主要流系均得到体现,包括大洋环流的西向强化的现象(黑潮、湾流等)。黑潮主轴的流量约54Sv(1Sv=106m3/s),非常接近实测值;各层水平流场分布情况显示,各大洋的一些基本流系都能得到很好的再现。如黑潮和南极绕极流可深达底层。湾流不能到达深层,大约在1000～2000m之间海流即已转向。

The two-dimensional global freeboard model with high resolution (1/4 ° × 1/4 °) is used to estimate the global ocean current circulation. The simulation results are very similar to other simulation results. The distribution of stream functions shows that the major flow systems in the global ocean are reflected, including the intensification of the western circulation in the ocean (such as the Kuroshio and the Gulf Stream). The flow of the Kuroshio main shaft is about 54Sv (1Sv = 106m3 / s), which is very close to the measured value. The horizontal flow field distribution in each layer shows that some basic flow systems in the ocean can be well reproduced. Such as the Kuroshio and Antarctic around the polar current can reach the bottom. Gulfstream can not reach deep, about 1000 ~ 2000m between the current has been diverted.