Research output: Contribution to journal › Article › peer-review
Application of the marine circular electric dipole method in high latitude Arctic regions using drifting ice floes. / Mogilatov, Vladimir; Goldman, Mark; Persova, Marina et al.
In: Journal of Applied Geophysics, Vol. 135, 01.12.2016, p. 17-31.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Application of the marine circular electric dipole method in high latitude Arctic regions using drifting ice floes
AU - Mogilatov, Vladimir
AU - Goldman, Mark
AU - Persova, Marina
AU - Soloveichik, Yury
AU - Koshkina, Yulia
AU - Trubacheva, Olga
AU - Zlobinskiy, Arkadiy
PY - 2016/12/1
Y1 - 2016/12/1
N2 - Theoretically, a circular electric dipole is a horizontal analogue of a vertical electric dipole and, similarly to the latter, it generates the unimodal transverse magnetic field. As a result, it demonstrates exceptionally high signal detectability and both vertical and lateral resolutions, particularly regarding thin resistive targets. The ideal circular electric dipole is represented by two concentric continuums of electrodes connected to different poles of the transmitter. In practice, the ideal dipole is adequately approximated by eight outer electrodes and one central electrode. The greatest disadvantage of circular electric dipoles stems from the necessity to provide perfectly symmetrical radial grounded lines with equal current in each line. In addition, relocating such a cumbersome system is very difficult on land and offshore. All these disadvantages might be significantly reduced in the proposed ice-borne system. The system utilizes drifting ice floes in high latitude Arctic regions as stable platforms for locating marine circular electric dipole transmitters, while the underlain ocean water is a perfect environment for grounding transmitter and receiver electrodes. Taking into account the limited size of drifting floes, mainly short offset methods can be applied from the surface. Among those, the proposed method is superior in providing sufficiently high signal detectability and resolution to delineate deep targets below very conductive ocean water and sub-seafloor sediments. Other existing methods, which are able to provide similar characteristics, utilize near bottom arrays and would be hard to employ in the presence of a thick ice cover.
AB - Theoretically, a circular electric dipole is a horizontal analogue of a vertical electric dipole and, similarly to the latter, it generates the unimodal transverse magnetic field. As a result, it demonstrates exceptionally high signal detectability and both vertical and lateral resolutions, particularly regarding thin resistive targets. The ideal circular electric dipole is represented by two concentric continuums of electrodes connected to different poles of the transmitter. In practice, the ideal dipole is adequately approximated by eight outer electrodes and one central electrode. The greatest disadvantage of circular electric dipoles stems from the necessity to provide perfectly symmetrical radial grounded lines with equal current in each line. In addition, relocating such a cumbersome system is very difficult on land and offshore. All these disadvantages might be significantly reduced in the proposed ice-borne system. The system utilizes drifting ice floes in high latitude Arctic regions as stable platforms for locating marine circular electric dipole transmitters, while the underlain ocean water is a perfect environment for grounding transmitter and receiver electrodes. Taking into account the limited size of drifting floes, mainly short offset methods can be applied from the surface. Among those, the proposed method is superior in providing sufficiently high signal detectability and resolution to delineate deep targets below very conductive ocean water and sub-seafloor sediments. Other existing methods, which are able to provide similar characteristics, utilize near bottom arrays and would be hard to employ in the presence of a thick ice cover.
KW - Arctic
KW - Circular electric dipole
KW - Drifting ice floes
UR - http://www.scopus.com/inward/record.url?scp=84988698660&partnerID=8YFLogxK
U2 - 10.1016/j.jappgeo.2016.08.007
DO - 10.1016/j.jappgeo.2016.08.007
M3 - Article
AN - SCOPUS:84988698660
VL - 135
SP - 17
EP - 31
JO - Journal of Applied Geophysics
JF - Journal of Applied Geophysics
SN - 0926-9851
ER -
ID: 25709511