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Direct observations of sea-ice thickness and brine rejection off Sakhalin in the Sea of Okhotsk
| Title: | Direct observations of sea-ice thickness and brine rejection off Sakhalin in the Sea of Okhotsk |
| Authors: | Fukamachi, Yasushi Browse this author →KAKEN DB | | Shirasawa, Kunio Browse this author →KAKEN DB | | Polomoshnov, Anatoliy M. Browse this author | | Ohshima, Kay I. Browse this author →KAKEN DB | | Kalinin, Ervin Browse this author | | Nihashi, Sohey Browse this author | | Melling, Humfrey Browse this author | | Mizuta, Genta Browse this author | | Wakatsuchi, Masaaki Browse this author |
| Keywords: | Sea ice | | Ice thickness | | Polynyas | | Time series | | Ice-profiling sonar | | Brine rejection | | The Sea of Okhotsk |
| Issue Date: | 15-Jun-2009 |
| Publisher: | Elsevier Ltd. |
| Journal Title: | Continental Shelf Research |
| Volume: | 29 |
| Issue: | 11-12 |
| Start Page: | 1541 |
| End Page: | 1548 |
| Publisher DOI: | 10.1016/j.csr.2009.04.005 |
| Abstract: | 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. |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/38838 |
| Appears in Collections: | 低温科学研究所 (Institute of Low Temperature Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 深町 康
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