A study of oceanic internal waves using satellite imagery and ship data
A study of oceanic internal waves using satellite imagery and ship data
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DOI：
10.1016/0034-4257(76)90043-2
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发表时间：
1976
影响因子：
13.5
通讯作者：
J. Apel;H. Byrne;J. Proni;R. L. Sellers
中科院分区：
文献类型：
--
作者：
J. Apel;H. Byrne;J. Proni;R. L. Sellers
自1972年以来，陆地卫星1号和2号的数据一直在研究海洋内波的表面表现。内波表现为表面光学反射率的周期性、间歇性变化，在某些情况下可以从航天器、飞机和地面车辆上看到。陆地卫星资料表明，波浪的来源是在大陆架边缘的半日和全日潮汐作用。波的特性的研究产生相当深入的了解其激发，传播和耗散的物理。从缅因州湾到哈特拉斯角，以及从美国和非洲东海岸和西海岸、墨西哥湾和加勒比海、加州湾、苏禄海和波罗的海拍摄的图像中，都观察到了包裹。由于频率色散和非线性振幅效应的共同作用，内波群的波长从包的前部到后部呈现出有序的变化。与两个为期18天的Landsat-1周期同步进行了一次海洋学巡航，并采集了关于温度、密度变化、声学回波和伴随内波的表面浮油的数据。这些数据与航天器和U-2同时拍摄的图像的相关性令人满意。
Surface manifestations of oceanic internal waves have been studied in Landsat-1 and -2 data since 1972. The internal waves appear as periodic, intermittent variations in the surface optical reflectivity and are visible from spacecraft, aircraft, and surface vehicles under certain circumstances. The Landsat data suggest that the source of the waves is semidiurnal and diurnal tidal action at the edge of the continental shelf. A study of the wave characteristics yields considerable insight into the physics of their excitation, propagation, and dissipation. Packets have been observed from the Gulf of Maine to Cape Hatteras and in images taken off the U.S. and African east and west coasts, the Gulf of Mexico and the Caribbean, The Gulf of California, the Sulu Sea, and the Baltic. The internal wave groups show an orderly variation in wavelength from front to rear of the packet, due to a combination of frequency dispersion and nonlinear amplitude effects. An oceanographic cruise was carried out in synchronism with two 18-day Landsat-1 cycles, and data were taken on temperature, density variations, acoustic echoes, and surface slicks accompanying the internal waves. The data were satisfactorily correlated with spacecraft and U-2 imagery taken simultaneously.