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Diurnal tides in the Arctic OceanA 2D numerical model with a space grid of about 14 km is applied to calculate diurnal tidal constituents K(1) and O(1) in the Arctic Ocean. Calculated corange and cotidal charts show that along the continental slope, local regions of increased sea level amplitude, highly variable phase and enhanced currents occur. It is shown that in these local regions, shelf waves (topographic waves) of tidal origin are generated. In the Arctic Ocean and Northern Atlantic Ocean more than 30 regions of enhanced currents are identified. To prove the near-resonant interaction of the diurnal tides with the local bottom topography, the natural periods of oscillations for all regions have been calculated. The flux of energy averaged over the tidal period depicts the gyres of semitrapped energy, suggesting that the shelf waves are partially trapped over the irregularities of the bottom topography. It is shown that the occurrence of near-resonance phenomenon changes the energy flow in the tidal waves. First, the flux of energy from the astronomical sources is amplified in the shelf wave regions, and afterwards the tidal energy is strongly dissipated in the same regions.
Document ID
19940033982
Document Type
Reprint (Version printed in journal)
Authors
Kowalik, Z. (Alaska Univ. Fairbanks, United States)
Proshutinsky, A. Y. (Arctic and Antarctic Research Inst. St. Petersburg, Russia)
Date Acquired
August 16, 2013
Publication Date
September 15, 1993
Publication Information
Publication: Journal of Geophysical Research
Volume: 98
Issue: C9
ISSN: 0148-0227
Subject Category
OCEANOGRAPHY
Funding Number(s)
CONTRACT_GRANT: NSF DPP-91-14549
CONTRACT_GRANT: NAGW-2972
Distribution Limits
Public
Copyright
Other