On the Generation and Directional Recording of Waves in the Arctic Ocean.

An experiment to investigate the directional nature and the possible generation mechanisms for waves on the Arctic Ocean, an ocean almost entirely covered with sea ice, is described. The waves under consideration have periods between 10 and 100 seconds and amplitudes between 0.001 and 2.0 centimeter...

Full description

Bibliographic Details
Main Author: Leschack, Leonard A.
Other Authors: NAVAL OCEANOGRAPHIC OFFICE NSTL STATION MS
Format: Text
Language:English
Published: 1965
Subjects:
Meteorology
Physical and Dynamic Oceanography
Snow
Ice and Permafrost
*OCEAN WAVES
*ARCTIC OCEAN
*STORMS
*SEA ICE
BAROMETRIC PRESSURE
OCEANOGRAPHY
OCEAN SURVEILLANCE
OCEANOGRAPHIC EQUIPMENT
WIND
SHOCK WAVES
BENDING
CORRELATION TECHNIQUES
FREQUENCY
SIBERIA
BAROMETRIC PRESSURE WAVES
ENERGY TRANSFER
GRAVIMETRY
OCEAN WAVE DIRECTION
*OCEAN WAVE GENERATION
WAVE RECORDERS(WATER WAVES)
Arctic
Arctic Ocean
Ice
permafrost
Sea ice
Siberia
Online Access:http://www.dtic.mil/docs/citations/AD0863511
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0863511
Description
Summary:An experiment to investigate the directional nature and the possible generation mechanisms for waves on the Arctic Ocean, an ocean almost entirely covered with sea ice, is described. The waves under consideration have periods between 10 and 100 seconds and amplitudes between 0.001 and 2.0 centimeters. In the present work an array of two continuously recording gravimeters 1,240 meters apart was established at drift station ARLIS II. Observed waves with distinct periods were associated with a storm over Siberia. A continuously recording microbarograph sensitive to atmospheric micropressure oscillations in the 10- to 100-second period range was also installed at ARLIS II. Distinct oscillations were observed in this period range having amplitude of from 20 to 400 dynes/sq cm. Power spectra of micropressure records made before, during, and after a storm show that oscillation amplitude is proportional to the period of the oscillation and speed of local winds. Cross correlation between the micropressure records and wave records taken with a gravimeter at the same location as the microbarograph shows a positive correlation between the micropressure waves and the ocean waves. This correlation appears to vary with the direction of the local surface wind. These micropressure waves contained sufficient force to bend the ice and generate the observed water waves. (Author)

Similar Items