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1971•Journal of Physical OceanographyOpen access

On the Detection of “Inertial” Waves with Pycnocline Followers

Claes Rooth, Walter Düing

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Abstract

The vertical displacements associated with oscillations near the local inertial frequency f, in a stratified ocean, are found to be significant, even very close to f. For a frequency, ω=(1+ε)f, the ratio of rms vertical velocity to horizontal velocity is O(ε1/2). Observations near Hawaii, made with a recently developed pycnocline follower, show inertial oscillation events similar to those found by Webster in current meter records, and discussed theoretically by Crepon and by Pollard.

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The vertical displacements associated with oscillations near the local inertial frequency f, in a stratified ocean, are found to be significant, even very close to f. For a frequency, ω=(1+ε)f, the ratio of rms vertical velocity to horizontal velocity is O(ε1/2). Observations near Hawaii, made with a recently developed pycnocline follower, show inertial oscillation events similar to those found by Webster in current meter records, and discussed theoretically by Crepon and by Pollard.

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Available abstract

The vertical displacements associated with oscillations near the local inertial frequency f, in a stratified ocean, are found to be significant, even very close to f. For a frequency, ω=(1+ε)f, the ratio of rms vertical velocity to horizontal velocity is O(ε1/2). Observations near Hawaii, made with a recently developed pycnocline follower, show inertial oscillation events similar to those found by Webster in current meter records, and discussed theoretically by Crepon and by Pollard.

Key concepts: Pycnocline, Current meter, Inertial wave, Geology, Internal wave, Inertial frame of reference, Oscillation (cell signaling), Geodesy

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