The Barents Sea Polar Front in Summer
In August 1992 a combined physical oceanography and acoustic tomography experiment was conducted to describe the Barents Sea Polar Front (BSPF) and investigate its impact on the regional oceanography. The study area was an 80 X 70 km grid east of Bear Island where the front exhibits topographic trap...
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ftdtic:ADA328670 2023-05-15T15:02:04+02:00 The Barents Sea Polar Front in Summer Parsons, A. R. Bourke, Robert H. Muench, Robin D. Chiu, Ching-Sang Lynch, James F. NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF OCEANOGRAPHY 1996-06-15 text/html http://www.dtic.mil/docs/citations/ADA328670 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA328670 en eng http://www.dtic.mil/docs/citations/ADA328670 Availability: Pub. in Jnl. of Geophysical Research, v101 nC6 p14201-14221, 15 Jun 96. No copies furnished by DTIC/NTIS. DTIC AND NTIS Physical and Dynamic Oceanography *WATER MASSES *OCEANOGRAPHY REPRINTS ACOUSTIC WAVES BATHYMETRY TIDAL CURRENTS ATLANTIC OCEAN SALINITY NORWAY HYDROGRAPHY SEA WATER GEOSTROPHIC CURRENTS GEOSTROPHIC WIND COMPUTERIZED TOMOGRAPHY SUMMER ARCTIC REGIONS MOORING RECIRCULATION *BSPF(BARENTS SEA POLAR FRONT) Text 1996 ftdtic 2016-02-19T20:41:32Z In August 1992 a combined physical oceanography and acoustic tomography experiment was conducted to describe the Barents Sea Polar Front (BSPF) and investigate its impact on the regional oceanography. The study area was an 80 X 70 km grid east of Bear Island where the front exhibits topographic trapping along the northern slope of the Bear Island Trough. Conductivity-temperature-depth, current meter, and acoustic Doppler current profiler (ADCP) data, combined with tomographic cross sections, presented a highly resolved picture of the front in August. All hydrographic measurements were dominated by tidal signals, with the strongest signatures associated with the M2 and 52 semidiurnal species. Mean currents in the warm saline water to the south of the front, derived from a current meter mooring and ADCP data, were directed to the southwest and may be associated with a barotropic recirculation of Norwegian Atlantic Water (NAW) within the Bear Island Trough. The geostrophic component of the velocity was well correlated with the measured southwestward mean surface layer flow north of the front. The frontal structure was retrograde, as the frontal isopleths sloped opposite to the bathymetry. The surface signature of the front was dominated by salinity gradients associated with the confluence of Atlantic and Arctic water masses, both warmed by insolation to a depth of about 20 m. The surface manifestation of the front varied laterally on the order of 10 km associated with tidal oscillations. Below the mixed layer, temperature and salinity variations were compensating, defining a nearly barotropic front. The horizontal scale of the front in this region was ^3 km or less. At middepth beneath the frontal interface, tomographic cross sections indicated a high-frequency (^16 cpd) upslope motion of filaments of NAW origin. Text Arctic Barents Sea Bear Island Defense Technical Information Center: DTIC Technical Reports database Arctic Barents Sea Bear Island ENVELOPE(-67.250,-67.250,-68.151,-68.151) Norway |
institution |
Open Polar |
collection |
Defense Technical Information Center: DTIC Technical Reports database |
op_collection_id |
ftdtic |
language |
English |
topic |
Physical and Dynamic Oceanography *WATER MASSES *OCEANOGRAPHY REPRINTS ACOUSTIC WAVES BATHYMETRY TIDAL CURRENTS ATLANTIC OCEAN SALINITY NORWAY HYDROGRAPHY SEA WATER GEOSTROPHIC CURRENTS GEOSTROPHIC WIND COMPUTERIZED TOMOGRAPHY SUMMER ARCTIC REGIONS MOORING RECIRCULATION *BSPF(BARENTS SEA POLAR FRONT) |
spellingShingle |
Physical and Dynamic Oceanography *WATER MASSES *OCEANOGRAPHY REPRINTS ACOUSTIC WAVES BATHYMETRY TIDAL CURRENTS ATLANTIC OCEAN SALINITY NORWAY HYDROGRAPHY SEA WATER GEOSTROPHIC CURRENTS GEOSTROPHIC WIND COMPUTERIZED TOMOGRAPHY SUMMER ARCTIC REGIONS MOORING RECIRCULATION *BSPF(BARENTS SEA POLAR FRONT) Parsons, A. R. Bourke, Robert H. Muench, Robin D. Chiu, Ching-Sang Lynch, James F. The Barents Sea Polar Front in Summer |
topic_facet |
Physical and Dynamic Oceanography *WATER MASSES *OCEANOGRAPHY REPRINTS ACOUSTIC WAVES BATHYMETRY TIDAL CURRENTS ATLANTIC OCEAN SALINITY NORWAY HYDROGRAPHY SEA WATER GEOSTROPHIC CURRENTS GEOSTROPHIC WIND COMPUTERIZED TOMOGRAPHY SUMMER ARCTIC REGIONS MOORING RECIRCULATION *BSPF(BARENTS SEA POLAR FRONT) |
description |
In August 1992 a combined physical oceanography and acoustic tomography experiment was conducted to describe the Barents Sea Polar Front (BSPF) and investigate its impact on the regional oceanography. The study area was an 80 X 70 km grid east of Bear Island where the front exhibits topographic trapping along the northern slope of the Bear Island Trough. Conductivity-temperature-depth, current meter, and acoustic Doppler current profiler (ADCP) data, combined with tomographic cross sections, presented a highly resolved picture of the front in August. All hydrographic measurements were dominated by tidal signals, with the strongest signatures associated with the M2 and 52 semidiurnal species. Mean currents in the warm saline water to the south of the front, derived from a current meter mooring and ADCP data, were directed to the southwest and may be associated with a barotropic recirculation of Norwegian Atlantic Water (NAW) within the Bear Island Trough. The geostrophic component of the velocity was well correlated with the measured southwestward mean surface layer flow north of the front. The frontal structure was retrograde, as the frontal isopleths sloped opposite to the bathymetry. The surface signature of the front was dominated by salinity gradients associated with the confluence of Atlantic and Arctic water masses, both warmed by insolation to a depth of about 20 m. The surface manifestation of the front varied laterally on the order of 10 km associated with tidal oscillations. Below the mixed layer, temperature and salinity variations were compensating, defining a nearly barotropic front. The horizontal scale of the front in this region was ^3 km or less. At middepth beneath the frontal interface, tomographic cross sections indicated a high-frequency (^16 cpd) upslope motion of filaments of NAW origin. |
author2 |
NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF OCEANOGRAPHY |
format |
Text |
author |
Parsons, A. R. Bourke, Robert H. Muench, Robin D. Chiu, Ching-Sang Lynch, James F. |
author_facet |
Parsons, A. R. Bourke, Robert H. Muench, Robin D. Chiu, Ching-Sang Lynch, James F. |
author_sort |
Parsons, A. R. |
title |
The Barents Sea Polar Front in Summer |
title_short |
The Barents Sea Polar Front in Summer |
title_full |
The Barents Sea Polar Front in Summer |
title_fullStr |
The Barents Sea Polar Front in Summer |
title_full_unstemmed |
The Barents Sea Polar Front in Summer |
title_sort |
barents sea polar front in summer |
publishDate |
1996 |
url |
http://www.dtic.mil/docs/citations/ADA328670 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA328670 |
long_lat |
ENVELOPE(-67.250,-67.250,-68.151,-68.151) |
geographic |
Arctic Barents Sea Bear Island Norway |
geographic_facet |
Arctic Barents Sea Bear Island Norway |
genre |
Arctic Barents Sea Bear Island |
genre_facet |
Arctic Barents Sea Bear Island |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/ADA328670 |
op_rights |
Availability: Pub. in Jnl. of Geophysical Research, v101 nC6 p14201-14221, 15 Jun 96. No copies furnished by DTIC/NTIS. |
_version_ |
1766334058850156544 |