Sea ice and snow thickness and physical properties of an ice floe in the western Weddell Sea and their changes during spring warming
Helicopter-borne and ground-based electromagnetic (EM) ice thickness and ruler-stick snow thickness measurements as well as ice-core analyses of ice temperature, salinity and texture were performed over a 5-week observation period between November 27, 2004, and January 2, 2005, on an ice floe in the...
Published in: | Deep Sea Research Part II: Topical Studies in Oceanography |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Online Access: | https://oceanrep.geomar.de/id/eprint/28492/ https://oceanrep.geomar.de/id/eprint/28492/1/2008_Haas-etal_DSR2-55.pdf https://doi.org/10.1016/j.dsr2.2007.12.020 |
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ftoceanrep:oai:oceanrep.geomar.de:28492 2023-05-15T16:39:17+02:00 Sea ice and snow thickness and physical properties of an ice floe in the western Weddell Sea and their changes during spring warming Haas, Christian Nicolaus, Marcel Willmes, Sascha Worby, Anthony Flinspach, David 2008 text https://oceanrep.geomar.de/id/eprint/28492/ https://oceanrep.geomar.de/id/eprint/28492/1/2008_Haas-etal_DSR2-55.pdf https://doi.org/10.1016/j.dsr2.2007.12.020 en eng Elsevier https://oceanrep.geomar.de/id/eprint/28492/1/2008_Haas-etal_DSR2-55.pdf Haas, C., Nicolaus, M., Willmes, S., Worby, A. and Flinspach, D. (2008) Sea ice and snow thickness and physical properties of an ice floe in the western Weddell Sea and their changes during spring warming. Open Access Deep Sea Research Part II: Topical Studies in Oceanography, 55 (8-9). pp. 963-974. DOI 10.1016/j.dsr2.2007.12.020 <https://doi.org/10.1016/j.dsr2.2007.12.020>. doi:10.1016/j.dsr2.2007.12.020 cc_by_nc_3.0 info:eu-repo/semantics/openAccess Article PeerReviewed 2008 ftoceanrep https://doi.org/10.1016/j.dsr2.2007.12.020 2023-04-07T15:18:57Z Helicopter-borne and ground-based electromagnetic (EM) ice thickness and ruler-stick snow thickness measurements as well as ice-core analyses of ice temperature, salinity and texture were performed over a 5-week observation period between November 27, 2004, and January 2, 2005, on an ice floe in the western Weddell Sea at approximately 67°S, 55°W. The study was part of the Ice Station Polarstern (ISPOL) expedition of German research icebreaker R.V. Polarstern, investigating changes of physical, biological, and biogeochemical properties during the spring warming as a function of atmospheric and oceanic boundary conditions. The ice floe was composed of fragments of thin and thick first-year ice and thick second-year ice, with modal total thicknesses of 1.2–1.3, 2.1, and 2.4–2.9 m, respectively. This included modal snow thicknesses of 0.2–0.5 m on first-year ice and 0.75 m on second-year ice. During the observation period, snow thickness decreased by less than 0.2 m. There was hardly any ice thinning. Warming of snow and ice between 0.1 and 1.9 °C resulted in decreased ice salinity and increased brine volume. Direct current (DC) geoelectric and electromagnetic (EM) induction depth sounding were performed to study changes of electrical ice conductivity as a result of the observed ice warming. Bulk ice conductivity increased from to 37 to 97 mS/m. Analysis of conductivity anisotropy showed that the horizontal ice conductivity changed from 9 to 70 mS/m. These conductivity changes have only negligible effects on the thickness retrieval from EM measurements. Article in Journal/Newspaper ice core Sea ice Weddell Sea OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Weddell Weddell Sea Deep Sea Research Part II: Topical Studies in Oceanography 55 8-9 963 974 |
institution |
Open Polar |
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OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
Helicopter-borne and ground-based electromagnetic (EM) ice thickness and ruler-stick snow thickness measurements as well as ice-core analyses of ice temperature, salinity and texture were performed over a 5-week observation period between November 27, 2004, and January 2, 2005, on an ice floe in the western Weddell Sea at approximately 67°S, 55°W. The study was part of the Ice Station Polarstern (ISPOL) expedition of German research icebreaker R.V. Polarstern, investigating changes of physical, biological, and biogeochemical properties during the spring warming as a function of atmospheric and oceanic boundary conditions. The ice floe was composed of fragments of thin and thick first-year ice and thick second-year ice, with modal total thicknesses of 1.2–1.3, 2.1, and 2.4–2.9 m, respectively. This included modal snow thicknesses of 0.2–0.5 m on first-year ice and 0.75 m on second-year ice. During the observation period, snow thickness decreased by less than 0.2 m. There was hardly any ice thinning. Warming of snow and ice between 0.1 and 1.9 °C resulted in decreased ice salinity and increased brine volume. Direct current (DC) geoelectric and electromagnetic (EM) induction depth sounding were performed to study changes of electrical ice conductivity as a result of the observed ice warming. Bulk ice conductivity increased from to 37 to 97 mS/m. Analysis of conductivity anisotropy showed that the horizontal ice conductivity changed from 9 to 70 mS/m. These conductivity changes have only negligible effects on the thickness retrieval from EM measurements. |
format |
Article in Journal/Newspaper |
author |
Haas, Christian Nicolaus, Marcel Willmes, Sascha Worby, Anthony Flinspach, David |
spellingShingle |
Haas, Christian Nicolaus, Marcel Willmes, Sascha Worby, Anthony Flinspach, David Sea ice and snow thickness and physical properties of an ice floe in the western Weddell Sea and their changes during spring warming |
author_facet |
Haas, Christian Nicolaus, Marcel Willmes, Sascha Worby, Anthony Flinspach, David |
author_sort |
Haas, Christian |
title |
Sea ice and snow thickness and physical properties of an ice floe in the western Weddell Sea and their changes during spring warming |
title_short |
Sea ice and snow thickness and physical properties of an ice floe in the western Weddell Sea and their changes during spring warming |
title_full |
Sea ice and snow thickness and physical properties of an ice floe in the western Weddell Sea and their changes during spring warming |
title_fullStr |
Sea ice and snow thickness and physical properties of an ice floe in the western Weddell Sea and their changes during spring warming |
title_full_unstemmed |
Sea ice and snow thickness and physical properties of an ice floe in the western Weddell Sea and their changes during spring warming |
title_sort |
sea ice and snow thickness and physical properties of an ice floe in the western weddell sea and their changes during spring warming |
publisher |
Elsevier |
publishDate |
2008 |
url |
https://oceanrep.geomar.de/id/eprint/28492/ https://oceanrep.geomar.de/id/eprint/28492/1/2008_Haas-etal_DSR2-55.pdf https://doi.org/10.1016/j.dsr2.2007.12.020 |
geographic |
Weddell Weddell Sea |
geographic_facet |
Weddell Weddell Sea |
genre |
ice core Sea ice Weddell Sea |
genre_facet |
ice core Sea ice Weddell Sea |
op_relation |
https://oceanrep.geomar.de/id/eprint/28492/1/2008_Haas-etal_DSR2-55.pdf Haas, C., Nicolaus, M., Willmes, S., Worby, A. and Flinspach, D. (2008) Sea ice and snow thickness and physical properties of an ice floe in the western Weddell Sea and their changes during spring warming. Open Access Deep Sea Research Part II: Topical Studies in Oceanography, 55 (8-9). pp. 963-974. DOI 10.1016/j.dsr2.2007.12.020 <https://doi.org/10.1016/j.dsr2.2007.12.020>. doi:10.1016/j.dsr2.2007.12.020 |
op_rights |
cc_by_nc_3.0 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/j.dsr2.2007.12.020 |
container_title |
Deep Sea Research Part II: Topical Studies in Oceanography |
container_volume |
55 |
container_issue |
8-9 |
container_start_page |
963 |
op_container_end_page |
974 |
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1766029611336990720 |