Transmission and reflection of internal wave beams
Transmission and reflection of internal wave beams
复制标题
内波束的透射和反射
DOI：
--
复制
发表时间：
2010
期刊：
影响因子：
--
通讯作者：
B. Sutherland
中科院分区：
文献类型：
--
作者：
Kate D. Gregory;B. Sutherland
现有的预测平面重力内波穿过弱分层区域的部分透射的方法被修改，以便预测具有有限水平和垂直范围的内波束的透射。结果进行了比较，与实验室实验中，由振荡的圆柱体产生的内波入射在不同深度和分层的混合区域。除梁的特征频率接近弱分层混合区的最小浮力频率外，计算结果基本一致。在这种情况下，预测的透射系数随频率快速变化，因此对小的测量误差敏感。讨论了该方法在大气内波和海洋内波中的应用。
An existing method for predicting the partial transmission of plane internal gravity waves across a weakly stratified region is adapted so as to predict the transmission of internal wave beams having finite horizontal and vertical extent. The results are compared with laboratory experiments in which internal waves generated by an oscillating cylinder are incident upon a mixed region of varying depth and stratification. The results are in good agreement except when the characteristic frequency of the beam is close to the minimum buoyancy frequency of the weakly stratified mixed region. In this case, the predicted transmission coefficient varies rapidly with frequency and so is sensitive to small measurement errors. Applications of this method to atmospheric and oceanic internal waves are discussed.