On the use of reflection coefficient phase at hydroacoustic measurements of sea ice cover thickness
https://doi.org/10.7868/S2073667318010070
Abstract
With application to the task of remote measurement of the Arctic Sea ice cover thickness from under water, the effect of vertical heterogeneity of acoustic properties of sea ice of various type and age categories caused by their layered structure on phase of reflection coefficient of acoustic low-frequency harmonic plane wave at its normal incidence on sea water-ice interface is investigated by a method of model experiment. Two acoustic models of the real sea ice cover are considered: one with constants, another with continuously changing with cover thickness acoustic parameters — elastic medium density, velocity and attenuation coefficient of longitudinal acoustic waves in the medium. Graphic curves of thickness of the sounded ice cover as function of reflection coefficient phase calculated for each of two considered acoustic models of arctic sea ice are presented. It is shown that in order to increase reliability of ice thickness data it is reasonable to use typified acoustic models of sea ice cover which parameters are adequate to its certain type, age category and period of annual cycle within limits of which the measurements are conducted.
About the Authors
A. V. Bogorodskiy
Oceanpribor, JSC Concern
Russian Federation
Russian Federation
St.-Petersburg
K. V. Malyarov
Oceanpribor, JSC Concern
Russian Federation
Russian Federation
St.-Petersburg
References
1. Matishov G. G.,Dzhenyuk S. L.,Moiseev D. V. Climate and the big ecosystems of Arctic regions . Westnik Rossiyskoy Akademii nauk. 2017, 87, 2, 110—120 (in Russian).
2. Trukhin V. S. The device for measurement of an ice cover thickness from the loaded submarine, grounded on a pulse-phase method. Avtorskoye svidetel'stvo SSSR № 24248. 1961 (in Russian).
3. Smirnov G. E. Some issues of acoustics of under ice environment and development of hydroacoustic Instrument for measuring ice thickness over the submerged submarine. Dis. kand. fiz-mat. nauk, TsNII “Morfizpribor”. L., 1967 (in Russian).
4. Aleksandrov I. A. Classification of sea ice based on bottom surface relief and sound reflection from various types of rough ice. Akusticheskiy Zh. 1994, 40, 5, 738—742 (in Russian).
5. Vagapov R. H., Gavriló V. P., Kozlov A. I., Lebedev G. A., Logvin A. I. Remote methods of sea ice research. St.-Petersburg, Gidrometeoizdat, 1993. 341 p. (in Russian).
6. Bogorodskiy V. V. Elastic properties of ice. Akust. Zh. 1958, 4, 1, 19—23 (in Russian).
7. Bogorodskiy V. V., Napolskiy D. I. Experimental research of sound attenuation in structure of drifting ice of the arctic region. Voyennaya radioelektronika. 1962, 15 (193), 69—76 (in Russian).
8. Bogorodskiy V. V., Gavriló V. P., Nikitin V. A. Sound propagation in the ice crystallising from a salt water. Akust. Zh. 1976, 22, 2, 282—283 (in Russian).
9. Brekhovskikh L. M. Waves in layered media. M., Izd-vo AN SSSR, 1957. 502 p. (in Russian).
10. Gaytskhoki B. Ya., Morozov P. T., Sovalkov L. I. Research of structure and composition of sea ice in the arctic region. Tr. AANII. 1970, 295, 108—115 (in Russian).
11. Bogorodskiy V. V., Gavriló V. P., Nikitin V. A. Some features of an sound propagation in snow. Akust. Zh. 1974, XX, 2, 195—198 (in Russian).
12. Bogorodskiy V. V., Gavrilo´V. P. Ice. Physical properties. Modern methods of glaciology. L., Gidrometeoizdat, 1984. 384 p (in Russian).
Review
For citations:
Bogorodskiy A.V., Malyarov K.V. On the use of reflection coefficient phase at hydroacoustic measurements of sea ice cover thickness. Fundamental and Applied Hydrophysics. 2018;11(1):63-73. (In Russ.) https://doi.org/10.7868/S2073667318010070
Views:
81
Email this article 