Ocean acoustic tomography water formation and the gyre circulation. Other applications include the measurement of ocean tides, and the estimation of ocean mesoscale dynamics by combining tomography, satellite altimetry, and in situ data with ocean dynamical models. In addition to the decade-long measurements obtained in the North Pacific, acoustic thermometry has been employed to measure temperature changes of the upper layers of the Arctic Ocean basins, which continues to be an area of active interest. using data from acoustic pulses sent from one end of the earth to the other. Acoustic thermometry is an idea to observe the world's ocean basins, and the
Back Here on Earth however, and Back Here on Earth is still a very solid set, certainly worth acquiring if you like his other LPs for this label." All compositions by Gordon Lightfoot. Back Here on Earth Back Here On Earth is Canadian singer Gordon Lightfoot's fourth studio album, released in 1968 on the United Artists label. Apart from his eponymous debut album, it is Lightfoot's only studio album not to derive its title from a song on the album. "Back Here on Earth" was Lightfoot's last studio recording on the United Artists label which he left after releasing the live album "Sunday Concert"