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| DOI | 10.1029/2023JF007352 |
| Mapping Permafrost Variability and Degradation Using Seismic Surface Waves, Electrical Resistivity, and Temperature Sensing: A Case Study in Arctic Alaska | |
| 发表日期 | 2024 |
| ISSN | 2169-9003 |
| EISSN | 2169-9011 |
| 起始页码 | 129 |
| 结束页码 | 3 |
| 卷号 | 129期号:3 |
| 英文摘要 | Subsurface processes significantly influence surface dynamics in permafrost regions, necessitating utilizing diverse geophysical methods to reliably constrain permafrost characteristics. This research uses multiple geophysical techniques to explore the spatial variability of permafrost in undisturbed tundra and its degradation in disturbed tundra in Utqia & gdot;vik, Alaska. Here, we integrate multiple quantitative techniques, including multichannel analysis of surface waves (MASW), electrical resistivity tomography (ERT), and ground temperature sensing, to study heterogeneity in permafrost's geophysical characteristics. MASW results reveal active layer shear wave velocities (Vs) between 240 and 370 m/s, and permafrost Vs between 450 and 1,700 m/s, typically showing a low-high-low velocity pattern. Additionally, we find an inverse relationship between in situ Vs and ground temperature measurements. The Vs profiles along with electrical resistivity profiles reveal cryostructures such as cryopeg and ice-rich zones in the permafrost layer. The integrated results of MASW and ERT provide valuable information for characterizing permafrost heterogeneity and cryostructure. Corroboration of these geophysical observations with permafrost core samples' stratigraphies and salinity measurements further validates these findings. This combination of geophysical and temperature sensing methods along with permafrost core sampling confirms a robust approach for assessing permafrost's spatial variability in coastal environments. Our results also indicate that civil infrastructure systems such as gravel roads and pile foundations affect permafrost by thickening the active layer, lowering the Vs, and reducing heterogeneity. We show how the resulting Vs profiles can be used to estimate key parameters for designing buildings in permafrost regions and maintaining existing infrastructure in polar regions. |
| 英文关键词 | permafrost degradation; polar civil infrastructure; shear wave velocity (Vs); multichannel analysis of surface waves (MASW); electrical resistivity tomography (ERT); ground temperature sensing |
| 语种 | 英语 |
| WOS研究方向 | Geology |
| WOS类目 | Geosciences, Multidisciplinary |
| WOS记录号 | WOS:001185447700001 |
| 来源期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/302249 |
| 作者单位 | Colorado School of Mines; Pennsylvania Commonwealth System of Higher Education (PCSHE); Pennsylvania State University; Pennsylvania Commonwealth System of Higher Education (PCSHE); Pennsylvania State University; University of Alaska System; University of Alaska Fairbanks; Colorado School of Mines; Tomsk State University; University of Alaska System; University of Alaska Fairbanks |
| 推荐引用方式 GB/T 7714 | . Mapping Permafrost Variability and Degradation Using Seismic Surface Waves, Electrical Resistivity, and Temperature Sensing: A Case Study in Arctic Alaska[J],2024,129(3). |
| APA | (2024).Mapping Permafrost Variability and Degradation Using Seismic Surface Waves, Electrical Resistivity, and Temperature Sensing: A Case Study in Arctic Alaska.JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE,129(3). |
| MLA | "Mapping Permafrost Variability and Degradation Using Seismic Surface Waves, Electrical Resistivity, and Temperature Sensing: A Case Study in Arctic Alaska".JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE 129.3(2024). |
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