Project/Area Number |
23654163
|
Research Category |
Grant-in-Aid for Challenging Exploratory Research
|
Allocation Type | Multi-year Fund |
Research Field |
Meteorology/Physical oceanography/Hydrology
|
Research Institution | Hokkaido University |
Principal Investigator |
|
Co-Investigator(Kenkyū-buntansha) |
OHSHIMA Keiichiro 北海道大学, 低温科学研究所, 教授 (30185251)
|
Project Period (FY) |
2011 – 2013
|
Project Status |
Completed (Fiscal Year 2013)
|
Budget Amount *help |
¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2013: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2012: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2011: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
|
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 / 海氷 |
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.
|