| 缓变风场驱动下正压环流中的多涡结构 |
| |
| 引用本文： | 杨海军,刘秦玉.缓变风场驱动下正压环流中的多涡结构[J].热带海洋学报,2003,22(4):51-59. |
| |
| 作者姓名： | 杨海军 刘秦玉 |
| |
| 作者单位： | 中国海洋大学物理海洋实验室、海洋-大气相互作用与气候实验室,山东,青岛,266003 |
| |
| 基金项目： | 国家重点基础研究发展规划项目(G1999043807)，国家自然科学基金(49976004)，海外杰出青年基金(40028605) |
| |
| 摘 要： | 利用正压涡度方程，研究了缓变风场驱动下水平尺度1000km平底方形海盆中海洋环流的响应。结果表明，缓变风场驱动下海洋环流的响应是多涡型的，线性情形下多涡结构表现为共振受迫Rossby波；非线性情形下受迫Rossby波被扭曲，多涡结构是由受迫Rossby波和次海盆尺度的惯性再循环共同构成。无论是稳定风场还是缓变风场，非线性作用越强，环流越趋于不稳定；非线性作用强且水平耗散作用弱时，非线性不稳定过程可能完全掩盖了变化的风旋度向海盆涡度输人的影响，此时风的变化对环流型式不再重要。
|
| 关 键 词： | 缓变风场 多涡结构 Rossby波 惯性再循环 |
| 文章编号： | 1009-5470(2003)04-0051-09 |
| 修稿时间： | 2002年9月20日 |
MULTI-EDDY STRUCTURE IN BAROTROPIC CIRCULATION DRIVEN BY SLOWLY VARYING WIND |
| |
| YANG Hai-jun,LIU Qin-yu Physical Oceanography Lab&Ocean-Atmospheric Interaction and Climate Lab,Ocean University of China,Qingdao ,China.MULTI-EDDY STRUCTURE IN BAROTROPIC CIRCULATION DRIVEN BY SLOWLY VARYING WIND[J].Journal of Tropical Oceanography,2003,22(4):51-59. |
| |
| Authors: | YANG Hai-jun LIU Qin-yu Physical Oceanography Lab&Ocean-Atmospheric Interaction and Climate Lab Ocean University of China Qingdao China |
| |
| Institution: | YANG Hai-jun,LIU Qin-yu Physical Oceanography Lab&Ocean-Atmospheric Interaction and Climate Lab,Ocean University of China,Qingdao 266003,China |
| |
| Abstract: | A barotropic vorticity equation is used to study the response of ocean circulation driv-
en by slowly varying wind (SVW) in a closed square basin with flat bottom topography and a
horizontal scale of 1000km. The results show that the ocean circulation driven by SVW exhib-
its multi-eddy structures (MES). In linear cases the MES is the resonant forced Rossby wave
with the same frequency as that of wind stress. In nonlinear cases the forced Rossby wave is
distorted and the MES is the combination of the forced Rossby wave and the sub-basin-scale in-
ertial recirculation excited in the northwest or southwest corner of the basin. No matter driven
by steady or slowly varying wind stress, the mean circulation would be destabilized in the case
of stronger nonlinear and weaker dissipation. In this case, the instable process enshrouds the
influence of the varying wind stress curl on the circulation, as a result, the time variation of
wind stress is not important for the pattern of the circulation any more. |
| |
| Keywords: | slowly varying wind multi-eddy structure Rossby wave inertial recirculation |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
