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- Title
Tides and the Climate: Some Speculations.
- Authors
Munk, Walter; Bills, Bruce
- Abstract
The important role of tides in the mixing of the pelagic oceans has been established by recent experiments and analyses. The tide potential is modulated by long-period orbital modulations. Previously, Loder and Garrett found evidence for the 18.6-yr lunar nodal cycle in the sea surface temperatures of shallow seas. In this paper, the possible role of the 41 000-yr variation of the obliquity of the ecliptic is considered. The obliquity modulation of tidal mixing by a few percent and the associated modulation in the meridional overturning circulation (MOC) may play a role comparable to the obliquity modulation of the incoming solar radiation (insolation), a cornerstone of the Milanković theory of ice ages. This speculation involves even more than the usual number of uncertainties found in climate speculations.
- Subjects
TIDES; OCEAN; ECLIPTIC; OCEAN circulation; SOLAR radiation; OCEAN-atmosphere interaction; OCEAN currents; OCEANOGRAPHY; EARTH sciences
- Publication
Journal of Physical Oceanography, 2007, Vol 37, Issue 2, p135
- ISSN
0022-3670
- Publication type
Article
- DOI
10.1175/JPO3002.1