摘要
利用全球气候平均态的1°×1°的温度、盐度资料,根据Sturm-Liouville本征值理论,得到全球1°×1°的第一斜压Rossby变形半径λ1。根据层结流体中线性自由Rossby波理论,可知第一斜压Rossby波位相速度为βλ21,故由全球各个大洋海盆的宽度可得到第一斜压Rossby波在各大洋海盆中从东边界传到西边界的时间。由于第一斜压Rossby波在高纬海区传播非常慢,而南极绕极海区又是最宽的海盆,所以第一斜压Rossby波在此海区的调整时间最长。在简单的线性自由Rossby波理论下,南极绕极通道是全球Rossby波调整的控制海区。
Based on Sturm-Liouville eigen value theory, the 1°×1° global climatological mean data of the first baroclinic Rossby radius of deformation λ1, are computed by using the 1°×1°global climatological mean temperature and salinity data. Based on the linear free Rossby wave theory in the stratified fluid, the first baroclinic Rossby wave phase speed can be given by βλ1^2, so the times for the first baroclinic Rossby wave to cross different ocean basins can be computed from respective ocean basin widths. The time for Rossby wave to cross ocean basin is also called Rossby wave adjustment time, the first baroclinic Rossby wave propagates very slowly in high latitude sea area, and the Antarctic circumpolar sea area is the widest ocean basin, so the first baroclinic Rossby wave adjustment time in the sea area is the longest. Based on the linear free Rossby wave theory, the Antarctic circumpolar passage is the control sea area for the global Rossby wave adjustment.
出处
《海洋科学进展》
CAS
CSCD
北大核心
2007年第1期15-19,共5页
Advances in Marine Science
基金
国家自然科学基金项目--论风生大洋环流模拟中经向摩擦的重要性(40176008)和太平洋-印度洋暖池动力学和海气相互作用研究(40231012)
国家科技部国际合作重点项目--太平洋-印度洋暖池ARGO浮标观测研究(2002CD714001)
