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Bottom Temperature Fluctuations in the Northeast Pacific Ocean at Depth 920 to 1140 m

Bottom Temperature Fluctuations in the Northeast Pacific Ocean at Depth 920 to 1140 m Motions of water at medium depths on the continental slopes have seldom been measured. In this experiment, seven thermistors were placed on the ocean bottom at depths from 920 to 1410 m on the continental slope from 32°° to 47°°N in the northeast Pacific Ocean. Daily readings were taken for up to five years. Maximum-to-minimum fluctuation of the isotherms were as much as 320 m. A temperature decline in March coincides with the spring reversal of surface current. The largest oscillation is semiannual, and its amplitude shows little or no dependence upon latitude. The amplitude of the annual oscillation increases in the poleward direction. The Madden––Julian oscillation is prominent in the temperature spectra and cross spectra at 48 to 50 days periodicity; its amplitude has little dependence upon latitude. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Physical Oceanography American Meteorological Society

Bottom Temperature Fluctuations in the Northeast Pacific Ocean at Depth 920 to 1140 m

Journal of Physical Oceanography , Volume 30 (8) – Mar 9, 1999

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Publisher
American Meteorological Society
Copyright
Copyright © 1999 American Meteorological Society
ISSN
1520-0485
DOI
10.1175/1520-0485(2000)030<1910:BTFITN>2.0.CO;2
Publisher site
See Article on Publisher Site

Abstract

Motions of water at medium depths on the continental slopes have seldom been measured. In this experiment, seven thermistors were placed on the ocean bottom at depths from 920 to 1410 m on the continental slope from 32°° to 47°°N in the northeast Pacific Ocean. Daily readings were taken for up to five years. Maximum-to-minimum fluctuation of the isotherms were as much as 320 m. A temperature decline in March coincides with the spring reversal of surface current. The largest oscillation is semiannual, and its amplitude shows little or no dependence upon latitude. The amplitude of the annual oscillation increases in the poleward direction. The Madden––Julian oscillation is prominent in the temperature spectra and cross spectra at 48 to 50 days periodicity; its amplitude has little dependence upon latitude.

Journal

Journal of Physical OceanographyAmerican Meteorological Society

Published: Mar 9, 1999

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