Decadal Variability of Thermohaline Structure at the Sheba Site
Recent studies have documented changes in the thermohaline layer of the Canadian Basin. This study analyzes a year long set of temperature and salinity profiles from the SHEBA ice station, in comparison with the 40- year climatology from the EWG digital atlas, the most complete Arctic data compilati...
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ftdtic:ADA365397 2023-05-15T14:53:41+02:00 Decadal Variability of Thermohaline Structure at the Sheba Site Tyner, Robin D. NAVAL POSTGRADUATE SCHOOL MONTEREY CA 1999-06 text/html http://www.dtic.mil/docs/citations/ADA365397 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA365397 en eng http://www.dtic.mil/docs/citations/ADA365397 APPROVED FOR PUBLIC RELEASE DTIC AND NTIS Physical and Dynamic Oceanography Snow Ice and Permafrost *TEMPERATURE *SALINITY *ARCTIC REGIONS OCEAN CURRENTS CANADA THESES OCEANOGRAPHIC DATA ICE PACIFIC OCEAN CLIMATOLOGY BASINS(GEOGRAPHIC) ICEBREAKERS DECADA VARIABILILTY SHEBA ICE STATION EWG DIGITAL ATLAS CHUKCHI CAP BEAUFORT GYRE ADVECTIVE PATTERNS EURASIAN LOW PRESSURE SYSTEM BEAUFORT HIGH PRESSURE SYSTEM HERALD CANYON SHOALING *THERMOHALINE GLOBAL WARMING UPPER HALOCLINE SHEBA(SURFACE HEAT BUDGET OF THE ARCTIC) *CANADIAN BASIN Text 1999 ftdtic 2016-02-20T02:16:39Z Recent studies have documented changes in the thermohaline layer of the Canadian Basin. This study analyzes a year long set of temperature and salinity profiles from the SHEBA ice station, in comparison with the 40- year climatology from the EWG digital atlas, the most complete Arctic data compilation available. Significant anomalies were observed, including warming and shoaling of the Pacific layer south and east of the Chukchi Cap, absence of a Pacific layer north of the Chukchi Cap, upper halocline freshening, and large mixed layer salinity decreases in the Beaufort Sea in contrast to increases north of and over the Chukchi Cap. These anomalies suggest a shift in synoptic scale advective patterns in response to a weakened Beaufort High pressure system and a strengthened and expanded Eurasian Low pressure system. These circulation changes may restrict the flow of Pacific water through Herald Canyon, focusing it more through Barrow Canyon. Ice cover/thickness changes may also contribute to the observed anomalies. Text Arctic Beaufort Sea Chukchi Global warming Ice permafrost Defense Technical Information Center: DTIC Technical Reports database Arctic Barrow Canyon ENVELOPE(-154.000,-154.000,72.500,72.500) Canada Pacific |
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 *TEMPERATURE *SALINITY *ARCTIC REGIONS OCEAN CURRENTS CANADA THESES OCEANOGRAPHIC DATA ICE PACIFIC OCEAN CLIMATOLOGY BASINS(GEOGRAPHIC) ICEBREAKERS DECADA VARIABILILTY SHEBA ICE STATION EWG DIGITAL ATLAS CHUKCHI CAP BEAUFORT GYRE ADVECTIVE PATTERNS EURASIAN LOW PRESSURE SYSTEM BEAUFORT HIGH PRESSURE SYSTEM HERALD CANYON SHOALING *THERMOHALINE GLOBAL WARMING UPPER HALOCLINE SHEBA(SURFACE HEAT BUDGET OF THE ARCTIC) *CANADIAN BASIN |
spellingShingle |
Physical and Dynamic Oceanography Snow Ice and Permafrost *TEMPERATURE *SALINITY *ARCTIC REGIONS OCEAN CURRENTS CANADA THESES OCEANOGRAPHIC DATA ICE PACIFIC OCEAN CLIMATOLOGY BASINS(GEOGRAPHIC) ICEBREAKERS DECADA VARIABILILTY SHEBA ICE STATION EWG DIGITAL ATLAS CHUKCHI CAP BEAUFORT GYRE ADVECTIVE PATTERNS EURASIAN LOW PRESSURE SYSTEM BEAUFORT HIGH PRESSURE SYSTEM HERALD CANYON SHOALING *THERMOHALINE GLOBAL WARMING UPPER HALOCLINE SHEBA(SURFACE HEAT BUDGET OF THE ARCTIC) *CANADIAN BASIN Tyner, Robin D. Decadal Variability of Thermohaline Structure at the Sheba Site |
topic_facet |
Physical and Dynamic Oceanography Snow Ice and Permafrost *TEMPERATURE *SALINITY *ARCTIC REGIONS OCEAN CURRENTS CANADA THESES OCEANOGRAPHIC DATA ICE PACIFIC OCEAN CLIMATOLOGY BASINS(GEOGRAPHIC) ICEBREAKERS DECADA VARIABILILTY SHEBA ICE STATION EWG DIGITAL ATLAS CHUKCHI CAP BEAUFORT GYRE ADVECTIVE PATTERNS EURASIAN LOW PRESSURE SYSTEM BEAUFORT HIGH PRESSURE SYSTEM HERALD CANYON SHOALING *THERMOHALINE GLOBAL WARMING UPPER HALOCLINE SHEBA(SURFACE HEAT BUDGET OF THE ARCTIC) *CANADIAN BASIN |
description |
Recent studies have documented changes in the thermohaline layer of the Canadian Basin. This study analyzes a year long set of temperature and salinity profiles from the SHEBA ice station, in comparison with the 40- year climatology from the EWG digital atlas, the most complete Arctic data compilation available. Significant anomalies were observed, including warming and shoaling of the Pacific layer south and east of the Chukchi Cap, absence of a Pacific layer north of the Chukchi Cap, upper halocline freshening, and large mixed layer salinity decreases in the Beaufort Sea in contrast to increases north of and over the Chukchi Cap. These anomalies suggest a shift in synoptic scale advective patterns in response to a weakened Beaufort High pressure system and a strengthened and expanded Eurasian Low pressure system. These circulation changes may restrict the flow of Pacific water through Herald Canyon, focusing it more through Barrow Canyon. Ice cover/thickness changes may also contribute to the observed anomalies. |
author2 |
NAVAL POSTGRADUATE SCHOOL MONTEREY CA |
format |
Text |
author |
Tyner, Robin D. |
author_facet |
Tyner, Robin D. |
author_sort |
Tyner, Robin D. |
title |
Decadal Variability of Thermohaline Structure at the Sheba Site |
title_short |
Decadal Variability of Thermohaline Structure at the Sheba Site |
title_full |
Decadal Variability of Thermohaline Structure at the Sheba Site |
title_fullStr |
Decadal Variability of Thermohaline Structure at the Sheba Site |
title_full_unstemmed |
Decadal Variability of Thermohaline Structure at the Sheba Site |
title_sort |
decadal variability of thermohaline structure at the sheba site |
publishDate |
1999 |
url |
http://www.dtic.mil/docs/citations/ADA365397 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA365397 |
long_lat |
ENVELOPE(-154.000,-154.000,72.500,72.500) |
geographic |
Arctic Barrow Canyon Canada Pacific |
geographic_facet |
Arctic Barrow Canyon Canada Pacific |
genre |
Arctic Beaufort Sea Chukchi Global warming Ice permafrost |
genre_facet |
Arctic Beaufort Sea Chukchi Global warming Ice permafrost |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/ADA365397 |
op_rights |
APPROVED FOR PUBLIC RELEASE |
_version_ |
1766325263352725504 |