深海海底波至：远距离海洋声传播中一组无法解释的波至。

Deep seafloor arrivals: an unexplained set of arrivals in long-range ocean acoustic propagation.

作者信息

Stephen Ralph A, Bolmer S Thompson, Dzieciuch Matthew A, Worcester Peter F, Andrew Rex K, Buck Linda J, Mercer James A, Colosi John A, Howe Bruce M

机构信息

Woods Hole Oceanographic Institution, Woods Hole, MA 02543-1542, USA.

出版信息

J Acoust Soc Am. 2009 Aug;126(2):599-606. doi: 10.1121/1.3158826.

DOI:10.1121/1.3158826

PMID:19640024

Abstract

Receptions, from a ship-suspended source (in the band 50-100 Hz) to an ocean bottom seismometer (about 5000 m depth) and the deepest element on a vertical hydrophone array (about 750 m above the seafloor) that were acquired on the 2004 Long-Range Ocean Acoustic Propagation Experiment in the North Pacific Ocean, are described. The ranges varied from 50 to 3200 km. In addition to predicted ocean acoustic arrivals and deep shadow zone arrivals (leaking below turning points), "deep seafloor arrivals," that are dominant on the seafloor geophone but are absent or very weak on the hydrophone array, are observed. These deep seafloor arrivals are an unexplained set of arrivals in ocean acoustics possibly associated with seafloor interface waves.

摘要

描述了在2004年北太平洋远程海洋声学传播实验中获取的接收数据，这些数据是从船载源（频率范围为50 - 100赫兹）传输到海底地震仪（深度约5000米）以及垂直水听器阵列上最深的元件（位于海底上方约750米处）。距离范围从50公里到3200公里不等。除了预测的海洋声学波至和深阴影区波至（在转折点下方泄漏）外，还观测到了“深海底波至”，这些波至在海底检波器上占主导地位，但在水听器阵列上不存在或非常微弱。这些深海底波至是海洋声学中一组无法解释的波至，可能与海底界面波有关。