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Diurnal oscillations in atmospheric pressure at twenty‐five small oceanic islands
Author(s) -
Ray Richard D.
Publication year - 1998
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/1998gl900039
Subject(s) - amplitude , wavenumber , latitude , climatology , atmospheric sciences , atmospheric pressure , oscillation (cell signaling) , atmospheric circulation , geology , atmospheric tide , surface pressure , middle latitudes , troposphere , quasi biennial oscillation , environmental science , oceanography , geophysics , physics , geodesy , ionosphere , thermosphere , quantum mechanics , biology , optics , genetics
The diurnal oscillation in atmospheric surface pressure—the S 1 ( p ) tide—is estimated at 25 oceanic stations. The estimated mean amplitudes and phases are compared to two theoretical predictions of the migrating S 1 component recently computed by Braswell and Lindzen and to the older wavenumber‐1 decomposition of Haurwitz and Cowley. The new S 1 amplitudes are weaker than the Haurwitz‐Cowley amplitudes everywhere, suggesting that their model may have been unduly influenced by nonmigrating components from continental stations. The observations show best agreement with a theoretical model having 25 W m −2 additional atmospheric energy absorption relative to that inferred from general circulation models. Stations polewards of the S 1 critical latitude are somewhat anomalous.