Measurement of Fluctuations in the Tilt of Arctic Ice at the Cearex Oceanography Camp: Experiment Review, Data Catalog and Preliminary Results
Three tiltmeters set in a triangular array on the eastern Arctic Ocean near 83 deg. N, 10 deg E produced high quality data 30 Mar - 19 Apr 89, as part of the Coordinated Eastern Arctic Experiment (CEAREX). Spectra of tilt fluctuations show the same features as those from the Arctic Internal Wave Exp...
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ftdtic:ADA215059 2023-05-15T14:51:13+02:00 Measurement of Fluctuations in the Tilt of Arctic Ice at the Cearex Oceanography Camp: Experiment Review, Data Catalog and Preliminary Results Czipott, Peter V. Podney, Walter N. PHYSICAL DYNAMICS INC LA JOLLA CA 1989-09 text/html http://www.dtic.mil/docs/citations/ADA215059 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA215059 en eng http://www.dtic.mil/docs/citations/ADA215059 Approved for public release; distribution is unlimited. DTIC AND NTIS Physical and Dynamic Oceanography Snow Ice and Permafrost *OCEAN WAVES *SEA ICE MEASUREMENT PEAK VALUES TEMPERATURE WIND COHERENCE MOTION STRAIN(MECHANICS) RUPTURE VARIATIONS SPECTRA ICE GUSTS SPECTRAL ENERGY DISTRIBUTION CATALOGS OSCILLATION RIGIDITY SPECTRUM ANALYSIS FLEXURAL PROPERTIES TILT INTERNAL WAVES OPEN WATER ARCTIC REGIONS WAVE PACKETS EAST(DIRECTION) OCEANOGRAPHY BEAUFORT SEA PACK ICE TILTMETERS COMPRESSION FREQUENCY CEAREX ICE TILT ICE MECHANICS SWELLS(OCEAN WAVES) Text 1989 ftdtic 2016-02-23T03:06:27Z Three tiltmeters set in a triangular array on the eastern Arctic Ocean near 83 deg. N, 10 deg E produced high quality data 30 Mar - 19 Apr 89, as part of the Coordinated Eastern Arctic Experiment (CEAREX). Spectra of tilt fluctuations show the same features as those from the Arctic Internal Wave Experiment (AIWEX), recorded Apr 85 on the Beaufort Sea near 74 deg N, 145 deg W. They show a spectral peak centered near a period of 40 seconds, which results from a long period swell coming from open seas, together with a sharp rise in spectral density below a frequency of several cycles per hour, which comes from internal waves. A pronounced spectral valley or window, from about 2 mHz to 20 mHz, separates the two dominant features. In addition to quasi-stationary fluctuations that give the dominant spectral features, the data reveal three kinds of intermittent activity: 1) solitary internal waves emanating from the direction of the Yermak Plateau; 2) seismic-like signals coming from ice rupture; and 3) rapid oscillations with periods of a few seconds, lasting for tens of minutes, that possibly arise from rigid oscillations of an ice floe driven by wind gusts. Fluctuations in tilt are highly coherent with in situ temperature fluctuations that come from a solitary internal wave packet, but fluctuations in strain show little coherence. Because tilt results predominantly from ice flexure and strain mainly from ice compression, internal waves probably drive only flexural waves in the ice. Compressional noise dominates ice strain at internal wave frequencies, originating perhaps from differential motions of the ice pack. (edc) Text Arctic Arctic Ocean Beaufort Sea Ice ice pack permafrost Sea ice Yermak plateau Defense Technical Information Center: DTIC Technical Reports database Arctic Arctic Ocean Yermak Plateau ENVELOPE(5.000,5.000,81.250,81.250) |
institution |
Open Polar |
collection |
Defense Technical Information Center: DTIC Technical Reports database |
op_collection_id |
ftdtic |
language |
English |
topic |
Physical and Dynamic Oceanography Snow Ice and Permafrost *OCEAN WAVES *SEA ICE MEASUREMENT PEAK VALUES TEMPERATURE WIND COHERENCE MOTION STRAIN(MECHANICS) RUPTURE VARIATIONS SPECTRA ICE GUSTS SPECTRAL ENERGY DISTRIBUTION CATALOGS OSCILLATION RIGIDITY SPECTRUM ANALYSIS FLEXURAL PROPERTIES TILT INTERNAL WAVES OPEN WATER ARCTIC REGIONS WAVE PACKETS EAST(DIRECTION) OCEANOGRAPHY BEAUFORT SEA PACK ICE TILTMETERS COMPRESSION FREQUENCY CEAREX ICE TILT ICE MECHANICS SWELLS(OCEAN WAVES) |
spellingShingle |
Physical and Dynamic Oceanography Snow Ice and Permafrost *OCEAN WAVES *SEA ICE MEASUREMENT PEAK VALUES TEMPERATURE WIND COHERENCE MOTION STRAIN(MECHANICS) RUPTURE VARIATIONS SPECTRA ICE GUSTS SPECTRAL ENERGY DISTRIBUTION CATALOGS OSCILLATION RIGIDITY SPECTRUM ANALYSIS FLEXURAL PROPERTIES TILT INTERNAL WAVES OPEN WATER ARCTIC REGIONS WAVE PACKETS EAST(DIRECTION) OCEANOGRAPHY BEAUFORT SEA PACK ICE TILTMETERS COMPRESSION FREQUENCY CEAREX ICE TILT ICE MECHANICS SWELLS(OCEAN WAVES) Czipott, Peter V. Podney, Walter N. Measurement of Fluctuations in the Tilt of Arctic Ice at the Cearex Oceanography Camp: Experiment Review, Data Catalog and Preliminary Results |
topic_facet |
Physical and Dynamic Oceanography Snow Ice and Permafrost *OCEAN WAVES *SEA ICE MEASUREMENT PEAK VALUES TEMPERATURE WIND COHERENCE MOTION STRAIN(MECHANICS) RUPTURE VARIATIONS SPECTRA ICE GUSTS SPECTRAL ENERGY DISTRIBUTION CATALOGS OSCILLATION RIGIDITY SPECTRUM ANALYSIS FLEXURAL PROPERTIES TILT INTERNAL WAVES OPEN WATER ARCTIC REGIONS WAVE PACKETS EAST(DIRECTION) OCEANOGRAPHY BEAUFORT SEA PACK ICE TILTMETERS COMPRESSION FREQUENCY CEAREX ICE TILT ICE MECHANICS SWELLS(OCEAN WAVES) |
description |
Three tiltmeters set in a triangular array on the eastern Arctic Ocean near 83 deg. N, 10 deg E produced high quality data 30 Mar - 19 Apr 89, as part of the Coordinated Eastern Arctic Experiment (CEAREX). Spectra of tilt fluctuations show the same features as those from the Arctic Internal Wave Experiment (AIWEX), recorded Apr 85 on the Beaufort Sea near 74 deg N, 145 deg W. They show a spectral peak centered near a period of 40 seconds, which results from a long period swell coming from open seas, together with a sharp rise in spectral density below a frequency of several cycles per hour, which comes from internal waves. A pronounced spectral valley or window, from about 2 mHz to 20 mHz, separates the two dominant features. In addition to quasi-stationary fluctuations that give the dominant spectral features, the data reveal three kinds of intermittent activity: 1) solitary internal waves emanating from the direction of the Yermak Plateau; 2) seismic-like signals coming from ice rupture; and 3) rapid oscillations with periods of a few seconds, lasting for tens of minutes, that possibly arise from rigid oscillations of an ice floe driven by wind gusts. Fluctuations in tilt are highly coherent with in situ temperature fluctuations that come from a solitary internal wave packet, but fluctuations in strain show little coherence. Because tilt results predominantly from ice flexure and strain mainly from ice compression, internal waves probably drive only flexural waves in the ice. Compressional noise dominates ice strain at internal wave frequencies, originating perhaps from differential motions of the ice pack. (edc) |
author2 |
PHYSICAL DYNAMICS INC LA JOLLA CA |
format |
Text |
author |
Czipott, Peter V. Podney, Walter N. |
author_facet |
Czipott, Peter V. Podney, Walter N. |
author_sort |
Czipott, Peter V. |
title |
Measurement of Fluctuations in the Tilt of Arctic Ice at the Cearex Oceanography Camp: Experiment Review, Data Catalog and Preliminary Results |
title_short |
Measurement of Fluctuations in the Tilt of Arctic Ice at the Cearex Oceanography Camp: Experiment Review, Data Catalog and Preliminary Results |
title_full |
Measurement of Fluctuations in the Tilt of Arctic Ice at the Cearex Oceanography Camp: Experiment Review, Data Catalog and Preliminary Results |
title_fullStr |
Measurement of Fluctuations in the Tilt of Arctic Ice at the Cearex Oceanography Camp: Experiment Review, Data Catalog and Preliminary Results |
title_full_unstemmed |
Measurement of Fluctuations in the Tilt of Arctic Ice at the Cearex Oceanography Camp: Experiment Review, Data Catalog and Preliminary Results |
title_sort |
measurement of fluctuations in the tilt of arctic ice at the cearex oceanography camp: experiment review, data catalog and preliminary results |
publishDate |
1989 |
url |
http://www.dtic.mil/docs/citations/ADA215059 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA215059 |
long_lat |
ENVELOPE(5.000,5.000,81.250,81.250) |
geographic |
Arctic Arctic Ocean Yermak Plateau |
geographic_facet |
Arctic Arctic Ocean Yermak Plateau |
genre |
Arctic Arctic Ocean Beaufort Sea Ice ice pack permafrost Sea ice Yermak plateau |
genre_facet |
Arctic Arctic Ocean Beaufort Sea Ice ice pack permafrost Sea ice Yermak plateau |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/ADA215059 |
op_rights |
Approved for public release; distribution is unlimited. |
_version_ |
1766322275121889280 |