The Arctic Ocean Eigen Oscillations

The spectral task on the eigen oscillations of the Arctic Ocean level was solved using numerical integration of tidal Laplace equations without friction as the non-stationary boundary-value problem. The adiabatic conditions were prescribed at the boundaries. Free oscillations were induced by an arbi...

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Bibliographic Details
Main Authors: Proshutinsky, A. Yu., Polyakov, I. V.
Other Authors: ARCTIC AND ANTARCTIC RESEARCH INST LENINGRAD (USSR)
Format: Text
Language:English
Published: 1992
Subjects:
Atmospheric Physics
Physical and Dynamic Oceanography
Theoretical Mathematics
Mechanics
*BOUNDARY VALUE PROBLEMS
*OSCILLATION
ADIABATIC CONDITIONS
AMPLIFICATION
ARCTIC OCEAN
CYCLONES
EQUATIONS
INTEGRATION
NUMERICAL INTEGRATION
OCEANS
PERTURBATIONS
RESONANCE
SHIFTING
SPECTRA
STATIONARY
SURGES
TOPOGRAPHY
GREENHOUSE EFFECT
ENVIRONMENTAL IMPACT
Component Reports
*Global climate change
Arctic
Arctic Ocean
Fairbanks
Laplace
Climate change
Alaska
Online Access:http://www.dtic.mil/docs/citations/ADP007309
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADP007309
Description
Summary:The spectral task on the eigen oscillations of the Arctic Ocean level was solved using numerical integration of tidal Laplace equations without friction as the non-stationary boundary-value problem. The adiabatic conditions were prescribed at the boundaries. Free oscillations were induced by an arbitrary initial perturbation in the level field. The spectra of fire oscillations of the Arctic Ocean have significant maxima of spectral density at the periods of 30.38, 23.70, 17.30, 13.91, 12.55, 11.03, and 8. 10 hours. The zoning of the Arctic Ocean was made on the basis of differences in the spectra of free oscillations in some of its areas, the results of zoning being consistent with common representations of the geographical subdivision of the Arctic Ocean into basins, seas, and bays. The possibility of resonance amplification of shelf waves and double Kelvin waves in the areas with significant bottom topography irregularities was revealed. The resonance nature of the surge level oscillations caused by rapidly shifting cyclones was proven. The experimental studies confined the hypothesis of the resonance mechanism of tidal motions in the marginal seas of the Arctic Ocean. This article is from 'Proceedings of the International Conference on the Role of the Polar Regions in Global Change Held in Fairbanks, Alaska on 11-15 June 990. Volume 1', AD-A253 027, p347-354. See also Volume 2, AD-A253 028.

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