Oceanographic investigation of the marginal sea ice zone of the Chukchi Sea -- MIZPAC 1974
Continuous profiles of temperature and salinity (STD observations) were made in the shallow (approximately 45 m) Bering and Chukchi Seas in July 1974 as part of the MIZPAC program. In addition to measurements in ice-free waters, seven closely spaced crossings of the sea-ice margin were made along wi...
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Monterey, California. Naval Postgraduate School
1976
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ftnavalpschool:oai:calhoun.nps.edu:10945/29422 2024-06-09T07:43:57+00:00 Oceanographic investigation of the marginal sea ice zone of the Chukchi Sea -- MIZPAC 1974 Paquette, Robert G. Bourke, Robert H. Operations Research (OR) Naval Postgraduate School (U.S.) Graduate School of Operational and Information Sciences (GSOIS) 1976-05 application/pdf https://hdl.handle.net/10945/29422 en_US eng Monterey, California. Naval Postgraduate School NPS-58PA76051 https://hdl.handle.net/10945/29422 This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States. Marginal Sea Ice Zone Undersea Warfare Thermal Mesostructure Chukchi Sea Physical Oceanography Sound Speed Circulation MIZPAC Arctic Ocean Dynamic Oceanography Microstructure FLUID DYNAMICS--MATHEMATICAL MODELS Technical Report 1976 ftnavalpschool 2024-05-15T00:51:48Z Continuous profiles of temperature and salinity (STD observations) were made in the shallow (approximately 45 m) Bering and Chukchi Seas in July 1974 as part of the MIZPAC program. In addition to measurements in ice-free waters, seven closely spaced crossings of the sea-ice margin were made along with two crossings of the Alaskan coastal zone. In all, 111 STD stations and approximately 100 XBT drops were made for which graphs and tabulations were produced of temperature, salinity, density and sound speed. South of the ice the water is sharply layered with a warm fresh layer (8-10 C and approximately 10m thick) above a cold dense layer. At or near the sea-ice margin the layering gradually disappears with modification of isopycnals and isotherms extending to the bottom. Large scale temperature fluctuations of 0.5 to 2 C, termed mesostructure, were observed at 12-15m depth in the first three crossings, but were weak or absent in the other crossings. Mesostructure appears to be correlated with a relatively rapid melting of the ice, and hence, probably with a strong northward flow, or a diffuse ice margin . Mesostructure formation is believed to result from non-uniform lateral mixing of waters of different temperatures but the same density, possibly modified or controlled by a complex lateral pressure field near the ice. (Author) supported in part by the Arctic Submarine Laboratory, Naval Undersea Center, San Diego, California under Project Order Nos. 4-0025 and 00080. http://archive.org/details/oceanographicinv00paqu Report Arctic Arctic Ocean Arctic Submarine Laboratory Chukchi Chukchi Sea Sea ice Naval Postgraduate School: Calhoun Arctic Arctic Ocean Chukchi Sea |
institution |
Open Polar |
collection |
Naval Postgraduate School: Calhoun |
op_collection_id |
ftnavalpschool |
language |
English |
topic |
Marginal Sea Ice Zone Undersea Warfare Thermal Mesostructure Chukchi Sea Physical Oceanography Sound Speed Circulation MIZPAC Arctic Ocean Dynamic Oceanography Microstructure FLUID DYNAMICS--MATHEMATICAL MODELS |
spellingShingle |
Marginal Sea Ice Zone Undersea Warfare Thermal Mesostructure Chukchi Sea Physical Oceanography Sound Speed Circulation MIZPAC Arctic Ocean Dynamic Oceanography Microstructure FLUID DYNAMICS--MATHEMATICAL MODELS Paquette, Robert G. Bourke, Robert H. Oceanographic investigation of the marginal sea ice zone of the Chukchi Sea -- MIZPAC 1974 |
topic_facet |
Marginal Sea Ice Zone Undersea Warfare Thermal Mesostructure Chukchi Sea Physical Oceanography Sound Speed Circulation MIZPAC Arctic Ocean Dynamic Oceanography Microstructure FLUID DYNAMICS--MATHEMATICAL MODELS |
description |
Continuous profiles of temperature and salinity (STD observations) were made in the shallow (approximately 45 m) Bering and Chukchi Seas in July 1974 as part of the MIZPAC program. In addition to measurements in ice-free waters, seven closely spaced crossings of the sea-ice margin were made along with two crossings of the Alaskan coastal zone. In all, 111 STD stations and approximately 100 XBT drops were made for which graphs and tabulations were produced of temperature, salinity, density and sound speed. South of the ice the water is sharply layered with a warm fresh layer (8-10 C and approximately 10m thick) above a cold dense layer. At or near the sea-ice margin the layering gradually disappears with modification of isopycnals and isotherms extending to the bottom. Large scale temperature fluctuations of 0.5 to 2 C, termed mesostructure, were observed at 12-15m depth in the first three crossings, but were weak or absent in the other crossings. Mesostructure appears to be correlated with a relatively rapid melting of the ice, and hence, probably with a strong northward flow, or a diffuse ice margin . Mesostructure formation is believed to result from non-uniform lateral mixing of waters of different temperatures but the same density, possibly modified or controlled by a complex lateral pressure field near the ice. (Author) supported in part by the Arctic Submarine Laboratory, Naval Undersea Center, San Diego, California under Project Order Nos. 4-0025 and 00080. http://archive.org/details/oceanographicinv00paqu |
author2 |
Operations Research (OR) Naval Postgraduate School (U.S.) Graduate School of Operational and Information Sciences (GSOIS) |
format |
Report |
author |
Paquette, Robert G. Bourke, Robert H. |
author_facet |
Paquette, Robert G. Bourke, Robert H. |
author_sort |
Paquette, Robert G. |
title |
Oceanographic investigation of the marginal sea ice zone of the Chukchi Sea -- MIZPAC 1974 |
title_short |
Oceanographic investigation of the marginal sea ice zone of the Chukchi Sea -- MIZPAC 1974 |
title_full |
Oceanographic investigation of the marginal sea ice zone of the Chukchi Sea -- MIZPAC 1974 |
title_fullStr |
Oceanographic investigation of the marginal sea ice zone of the Chukchi Sea -- MIZPAC 1974 |
title_full_unstemmed |
Oceanographic investigation of the marginal sea ice zone of the Chukchi Sea -- MIZPAC 1974 |
title_sort |
oceanographic investigation of the marginal sea ice zone of the chukchi sea -- mizpac 1974 |
publisher |
Monterey, California. Naval Postgraduate School |
publishDate |
1976 |
url |
https://hdl.handle.net/10945/29422 |
geographic |
Arctic Arctic Ocean Chukchi Sea |
geographic_facet |
Arctic Arctic Ocean Chukchi Sea |
genre |
Arctic Arctic Ocean Arctic Submarine Laboratory Chukchi Chukchi Sea Sea ice |
genre_facet |
Arctic Arctic Ocean Arctic Submarine Laboratory Chukchi Chukchi Sea Sea ice |
op_relation |
NPS-58PA76051 https://hdl.handle.net/10945/29422 |
op_rights |
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States. |
_version_ |
1801372777677062144 |