气候变化领域集成服务门户(CCPortal): Results of ground-penetrating radar investigations on the nella fiord sea ice (progress station area, east antarctica) in the 2016/17 austral summer field season

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DOI	10.21782/KZ1560-7496-2018-3(18-26
	Results of ground-penetrating radar investigations on the nella fiord sea ice (progress station area, east antarctica) in the 2016/17 austral summer field season
	Popov S.V.; Kuznetsov V.L.; Pryakhin S.S.; Kashkevich M.P.
发表日期	2018
ISSN	15607496
卷号	22 期号:3
英文摘要	The paper presents the main results of the field investigations using multi-frequency (150 MHz, 270 MHz, 400 MHz and 900 MHz) ground-penetrating radar profiling and georadar sensing by the common depth point method. The investigations have been carried out on the fast sea ice of Nella Fiord (Eastern Antarctica) during the 2016/17 austral summer field season. The studies have included the seawater salinity measurements. The sounding of about 1 m thick sea ice have proved to be most efective at the radar frequencies which correspond to the wavelengths in a meter range. Besides the intensive reflections from the lower edge of sea ice, the ground-penetrating radar data have revealed a boundary between fresh and salt water whose position has been corroborated by salinity measurements. The ground-penetrating radar common depth point technique has served as a basis for the subsurface velocity model showing that efective dielectric constant for sea ice equals 10, which is accounted for intense near-surface internal melting and for the ice being exceedingly saturated with fresh water. The efective dielectric permittivity of the fresh water layer is found to be 75 that may have been prompted by roughness of the lower ice boundary. © 2018 Scientific Journal Earth's Cryosphere.
英文关键词	Common depth point; East Antarctica; Ground-penetrating radar sounding; Progress Station; Sea ice; Seawater salinity
学科领域	dielectric property; ground penetrating radar; ice thickness; melting; salinity; sea ice; seasonal variation; seawater; summer; Antarctica; East Antarctica
语种	英语
scopus关键词	dielectric property; ground penetrating radar; ice thickness; melting; salinity; sea ice; seasonal variation; seawater; summer; Antarctica; East Antarctica
来源期刊	Earth's Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/119159
作者单位	Polar Marine Geosurvey Expedition (PMGE), 24, Pobeda str., Lomonosov, St.-Petersburg, 198412, Russian Federation; Arctic and Antarctic Research Institute, 38, Bering str., St.-Petersburg, 199397, Russian Federation; Saint-Petersburg University, 7-9, Universitetskaya emb., St.-Petersburg, 199034, Russian Federation
推荐引用方式 GB/T 7714	Popov S.V.,Kuznetsov V.L.,Pryakhin S.S.,et al. Results of ground-penetrating radar investigations on the nella fiord sea ice (progress station area, east antarctica) in the 2016/17 austral summer field season[J],2018,22(3).
APA	Popov S.V.,Kuznetsov V.L.,Pryakhin S.S.,&Kashkevich M.P..(2018).Results of ground-penetrating radar investigations on the nella fiord sea ice (progress station area, east antarctica) in the 2016/17 austral summer field season.Earth's Cryosphere,22(3).
MLA	Popov S.V.,et al."Results of ground-penetrating radar investigations on the nella fiord sea ice (progress station area, east antarctica) in the 2016/17 austral summer field season".Earth's Cryosphere 22.3(2018).