Improvement in seafloor geodetic measurements by means of evaluation of sound speed variation in ocean
| Project/Area Number |
15K13557
|
|---|
| Research Category |
Grant-in-Aid for Challenging Exploratory Research
|
| Allocation Type | Multi-year Fund |
|---|
| Research Field |
Solid earth and planetary physics
|
|---|
| Research Institution | Tohoku University |
|---|
Principal Investigator |
Kido Motoyuki 東北大学, 災害科学国際研究所, 教授 (10400235)
|
|---|
| Project Period (FY) |
2015-04-01 – 2017-03-31
|
| Project Status |
Completed (Fiscal Year 2016)
|
| Budget Amount *help |
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2015: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
|
|---|
| Keywords | 海中音速場 / 海底地殻変動観測 / GPS-A / 内部重力波 / XBT / CTD / GPS音響結合方式 |
|---|
| Outline of Final Research Achievements |
It is crucial for improvement in seafloor geodetic measurement to evaluate sound speed variation in ocean. In order to construct a proper ocean model, we conducted intensive continuous measurement of temperature profile in ocean using XBT, which is an expandable thermistor. Based on its obtained data, we proved that short-period variation is mainly caused by internal gravity waves. Using internal wave model, we construct correction method for sound speed, which leads improvement in detecting horizontal movement and even vertical one.
|
Report
(3 results)
Research Products
(10 results)
-
-
[Journal Article] Buoy Platform Development for Observation of Tsunami and Crustal deformation2016
Author(s)
Takahashi N., Y. Ishihara, T. Fukuda, H. Ochi, J. Tahara, T. Mori, M. Deguchi, M. Kido, Y. Ohta, R. Hino, K. Mutoh, G. Hashimoto, O. Motohashi, and Y. Kaneda
-
Journal Title
International Association of Geodesy Symposia
Volume: 1
Pages: 1-8
DOI
ISBN
9783319397672, 9783319397689
Related Report
Peer Reviewed
-
-
-
-
-
-
-
-
