Direct observations of sea-ice thickness and brine rejection off Sakhalin in the Sea of Okhotsk
From December to June 2002-03, sea-ice and oceanic data were obtained from moorings near Sakhalin in the west central Okhotsk Sea. Ice draft measured by sonar reveals distinct periods of thin and thick ice. Thin-ice periods in January-March corresponded to offshore ice movement and increasing seawat...
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Online Access: | http://hdl.handle.net/2115/38838 https://doi.org/10.1016/j.csr.2009.04.005 |
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fthokunivhus:oai:eprints.lib.hokudai.ac.jp:2115/38838 2023-05-15T15:40:34+02:00 Direct observations of sea-ice thickness and brine rejection off Sakhalin in the Sea of Okhotsk Fukamachi, Yasushi Shirasawa, Kunio Polomoshnov, Anatoliy M. Ohshima, Kay I. Kalinin, Ervin Nihashi, Sohey Melling, Humfrey Mizuta, Genta Wakatsuchi, Masaaki http://hdl.handle.net/2115/38838 https://doi.org/10.1016/j.csr.2009.04.005 eng eng Elsevier Ltd. http://hdl.handle.net/2115/38838 Continental Shelf Research, 29(11-12): 1541-1548 http://dx.doi.org/10.1016/j.csr.2009.04.005 Sea ice Ice thickness Polynyas Time series Ice-profiling sonar Brine rejection The Sea of Okhotsk 452 article (author version) fthokunivhus https://doi.org/10.1016/j.csr.2009.04.005 2022-11-18T01:01:48Z From December to June 2002-03, sea-ice and oceanic data were obtained from moorings near Sakhalin in the west central Okhotsk Sea. Ice draft measured by sonar reveals distinct periods of thin and thick ice. Thin-ice periods in January-March corresponded to offshore ice movement and increasing seawater salinity. The measured change in salinity corresponds well with that derived from heat-flux calculations using the observed ice thickness. Brine rejection from ice growing in a coastal polynya off northern Sakhalin is responsible for much of the observed salinity increase. The simultaneous observation of Dense shelf water (> 26.7σθ) suggests that this region is one possible source. The periods of thick-ice incursion are likely indicative of heavily deformed pack formed further north and drifting south with the current. The mean draft (1.95 m), thick-ice ratio, and keel frequency during these periods are close to values observed in the Beaufort Sea. Freshwater transport estimated from the observed ice thickness and velocity is larger than that of the Amur River discharge. Article in Journal/Newspaper Beaufort Sea okhotsk sea Sakhalin Sea ice Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) Okhotsk Continental Shelf Research 29 11-12 1541 1548 |
institution |
Open Polar |
collection |
Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) |
op_collection_id |
fthokunivhus |
language |
English |
topic |
Sea ice Ice thickness Polynyas Time series Ice-profiling sonar Brine rejection The Sea of Okhotsk 452 |
spellingShingle |
Sea ice Ice thickness Polynyas Time series Ice-profiling sonar Brine rejection The Sea of Okhotsk 452 Fukamachi, Yasushi Shirasawa, Kunio Polomoshnov, Anatoliy M. Ohshima, Kay I. Kalinin, Ervin Nihashi, Sohey Melling, Humfrey Mizuta, Genta Wakatsuchi, Masaaki Direct observations of sea-ice thickness and brine rejection off Sakhalin in the Sea of Okhotsk |
topic_facet |
Sea ice Ice thickness Polynyas Time series Ice-profiling sonar Brine rejection The Sea of Okhotsk 452 |
description |
From December to June 2002-03, sea-ice and oceanic data were obtained from moorings near Sakhalin in the west central Okhotsk Sea. Ice draft measured by sonar reveals distinct periods of thin and thick ice. Thin-ice periods in January-March corresponded to offshore ice movement and increasing seawater salinity. The measured change in salinity corresponds well with that derived from heat-flux calculations using the observed ice thickness. Brine rejection from ice growing in a coastal polynya off northern Sakhalin is responsible for much of the observed salinity increase. The simultaneous observation of Dense shelf water (> 26.7σθ) suggests that this region is one possible source. The periods of thick-ice incursion are likely indicative of heavily deformed pack formed further north and drifting south with the current. The mean draft (1.95 m), thick-ice ratio, and keel frequency during these periods are close to values observed in the Beaufort Sea. Freshwater transport estimated from the observed ice thickness and velocity is larger than that of the Amur River discharge. |
format |
Article in Journal/Newspaper |
author |
Fukamachi, Yasushi Shirasawa, Kunio Polomoshnov, Anatoliy M. Ohshima, Kay I. Kalinin, Ervin Nihashi, Sohey Melling, Humfrey Mizuta, Genta Wakatsuchi, Masaaki |
author_facet |
Fukamachi, Yasushi Shirasawa, Kunio Polomoshnov, Anatoliy M. Ohshima, Kay I. Kalinin, Ervin Nihashi, Sohey Melling, Humfrey Mizuta, Genta Wakatsuchi, Masaaki |
author_sort |
Fukamachi, Yasushi |
title |
Direct observations of sea-ice thickness and brine rejection off Sakhalin in the Sea of Okhotsk |
title_short |
Direct observations of sea-ice thickness and brine rejection off Sakhalin in the Sea of Okhotsk |
title_full |
Direct observations of sea-ice thickness and brine rejection off Sakhalin in the Sea of Okhotsk |
title_fullStr |
Direct observations of sea-ice thickness and brine rejection off Sakhalin in the Sea of Okhotsk |
title_full_unstemmed |
Direct observations of sea-ice thickness and brine rejection off Sakhalin in the Sea of Okhotsk |
title_sort |
direct observations of sea-ice thickness and brine rejection off sakhalin in the sea of okhotsk |
publisher |
Elsevier Ltd. |
url |
http://hdl.handle.net/2115/38838 https://doi.org/10.1016/j.csr.2009.04.005 |
geographic |
Okhotsk |
geographic_facet |
Okhotsk |
genre |
Beaufort Sea okhotsk sea Sakhalin Sea ice |
genre_facet |
Beaufort Sea okhotsk sea Sakhalin Sea ice |
op_relation |
http://hdl.handle.net/2115/38838 Continental Shelf Research, 29(11-12): 1541-1548 http://dx.doi.org/10.1016/j.csr.2009.04.005 |
op_doi |
https://doi.org/10.1016/j.csr.2009.04.005 |
container_title |
Continental Shelf Research |
container_volume |
29 |
container_issue |
11-12 |
container_start_page |
1541 |
op_container_end_page |
1548 |
_version_ |
1766373022988500992 |