Comparison of ground-based and airborne transient electromagnetic methods for mapping glacial and permafrost environments: Cases from McMurdo Dry Valleys, Antarctica
Comparison of ground-based and airborne transient electromagnetic methods for mapping glacial and permafrost environments: Cases from McMurdo Dry Valleys, Antarctica
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用于绘制冰川和永久冻土环境的地基和机载瞬变电磁方法的比较：来自南极洲麦克默多干谷的案例
DOI：
10.1016/j.coldregions.2022.103578
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发表时间：
2022
影响因子：
4.1
通讯作者：
Auken, Esben
中科院分区：
文献类型：
--
作者：
Madsen, Line M.;Bording, Thue;Grombacher, Denys;Foged, Nikolaj;Foley, Neil;Dugan, Hilary A.;Doran, Peter T.;Mikucki, Jill;Tulaczyk, Slawek;Auken, Esben
瞬变电磁法（TEM）是一种非侵入式地球物理工具，非常适合寒冷和极地地区的地下成像，在这些地区，常见目标的电阻率差异很大。通过成像地下的电特性，TEM方法可以区分地质单元，如冻土（永久冻土），新鲜/含盐地下水系统，基岩/冰川冰。在这项研究中，我们比较了TEM数据采集与地面和机载TEM系统。我们证明了这两种方法在高纬度极地环境中的测绘能力与数据集泰勒冰川，万达湖，加拿大冰川在南极洲的麦克默多干谷。结果表明，航空和地面的TEM数据之间的高度一致性，都具有高分辨率和深穿透深度下降到数百米，由于电阻性背景材料，这使得这两种方法能够映射水文系统和识别冰川的基础。机载TEM方法提供了一个无与伦比的空间数据覆盖在困难的地形和一个大大提高横向分辨率相比，静态地基系统。基于地面的TEM系统提供了使用更大的发射器线圈和更长的叠加时间的可能性，因此具有达到更深的穿透深度的潜力。因此，地基TEM方法是一种有价值的工具，可以提供一致的成像结果，同时与机载TEM活动相比，在成本和现场后勤方面也更容易获得。
The transient electromagnetic (TEM) method is a non-invasive geophysical tool well-suited for subsurface imaging in cold and polar regions, where common targets are associated with strong contrasts in electrical resistivity. By imaging the electrical properties of the subsurface, the TEM methods can discriminate between geological units such as frozen ground (permafrost), fresh/saline groundwater systems, and bedrock/glacier ice. In this study, we compare TEM data acquired with ground-based and airborne TEM systems. We demonstrate the mapping capabilities of these two approaches in high latitude polar environments with datasets from Taylor Glacier, Lake Vanda, and Canada Glacier in the McMurdo Dry Valleys of Antarctica. The results show a high consistency between the airborne and ground-based TEM data, both with a high resolution and a deep penetration depth down to hundreds of meters due to the resistive background material, which makes both approaches capable of mapping hydrological systems and identifying the base of glaciers. The airborne TEM approach offers an unmatched spatial data coverage in difficult terrain and a far improved lateral resolution compared to the static ground-based system. The ground-based TEM system offers the possibility for using larger transmitter coils and longer stacking times and therefore has potential for reaching deeper penetration depths. The ground-based TEM approach is hence a valuable tool that can provide consistent imaging results while also being far more accessible in terms of cost and field logistics compared to an airborne TEM campaign.
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影响因子：
0.9
作者：
N. Foley;S. Tulaczyk;E. Auken;D. Grombacher;J. Mikucki;N. Foged;K. Myers;H. Dugan;P. Doran;R. Virginia
通讯作者：
N. Foley;S. Tulaczyk;E. Auken;D. Grombacher;J. Mikucki;N. Foged;K. Myers;H. Dugan;P. Doran;R. Virginia
南极洲干谷克拉克冰川和联邦冰川的探地雷达反射剖面
影响因子：
2.9
作者：
S. Arcone;K. Kreutz
通讯作者：
K. Kreutz
中央感应瞬变电磁测深的局部噪声预测滤波
DOI：
--
发表时间：
1988
期刊：
影响因子：
--
作者：
B. Spies
通讯作者：
B. Spies
影响因子：
4.4
作者：
Doran, PT;McKay, CP;Lyons, WB
通讯作者：
Lyons, WB
南极洲麦克默多站永久冻土、冰缘和近地表地质的探地雷达研究
DOI：
--
发表时间：
2017
期刊：
影响因子：
--
作者：
S. Campbell;R. Affleck;S. Sinclair
通讯作者：
S. Sinclair