2013 Fiscal Year Final Research Report
Development of a measurement method of sea-ice thickness by acoustic Doppler current profiler
| Project/Area Number |
23654163
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Meteorology/Physical oceanography/Hydrology
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| Research Institution | Hokkaido University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
OHSHIMA Keiichiro 北海道大学, 低温科学研究所, 教授 (30185251)
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| Project Period (FY) |
2011 – 2013
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| Keywords | 海氷厚 / 係留観測 / 超音波ドップラー流速計 / 超音波氷厚計 |
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| Research Abstract |
Sea-ice thickness is generally measured by specific ice-profiling sonar (IPS). We carried out mooring observations off the northern Alaska to develop a method of sea-ice thickness measurement by widely-used oceanographic instrument, acoustic Doppler current profiler (ADCP). We have successfully obtained valid data by a pair of an IPS and an ADCP at total of four locations over three-year period and derived sea-ice draft from raw IPS data.
Using sea-ice and oceanic data obtained by our mooring observations, we have investigated break-up of coastal landfast sea ice, production of supercooled water and frazil ice within a coastal polynya, and compared our ice-thickness data by IPS with those by airborne electromagnetic sensor and ice-drift data by ADCP with those by coastal radar.
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Research Products
(16 results)
