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Booms and Busts in the Deep

机译：深处的景气和萧条

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摘要

Deep sea (5 km) pressure and velocity at the Hawaii-2 Observatory (H2O), midway between Hawaii and California, exhibit a number of remarkable features that are interpreted using the Longuet-Higgins theory of acoustic radiation from oppositely directed surface waves. A change in the slope of the bottom spectra near 5 Hz can be associated with a transition near 2.5 Hz (25-cm wavelength) of the surface wave spectrum from the classical κ~(-4) saturated (wind independent) Phillips spectrum to a distinct band of ultragravity waves. Bottom spectra are remarkably stable. Occasional 15-dB busts in the gravities and booms in the ultragravities are prominent features in the bottom records and can be associated with calms and storms at the sea surface. For strong winds, two broad lobes in the directional spectrum of the gravity waves are nearly perpendicular to the wind; as the wind drops, the lobes become narrower and more nearly aligned with the wind, leading to busts.
机译：位于夏威夷和加利福尼亚之间的Hawaii-2天文台（H2O）处的深海（5 km）压力和速度显示出许多显着特征，这些特征可以用Longuet-Higgins理论从相反方向的面波发出的辐射进行解释。底部频谱斜率在5 Hz附近的变化可能与表面波频谱从经典κ〜（-4）饱和（与风无关）菲利普斯频谱在2.5 Hz（25 cm波长）附近的转变有关的超重力波带。底部光谱非常稳定。重力记录中偶尔出现的15 dB的半身像和超重力现象中的动臂是底部记录的突出特征，并且可能与海面的平静和暴风雨有关。对于强风，重力波方向谱中的两个宽波瓣几乎垂直于风。随着风的下降，裂片变得更窄，更接近风，导致破裂。

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  • 来源
    《Journal of Physical Oceanography》 |2010年第9期|P.2159-2169|共11页
  • 作者

    W. E. Farrell; Walter Munk;

  • 作者单位

    Science Applications International Corporation, McLean, Virginia 13765 Durango Drive, Del Mar, CA 92014;

    rnScripps Institution of Oceanography, University of California, San Diego, La Jolla, California;

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  • 正文语种 eng
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