Spatial Variability of Active Layer Thickness along the Qinghai-Tibet Engineering Corridor Resolved Using Ground-Penetrating Radar
文献类型：期刊论文
| 作者 | Jia, Shichao2; Zhang, Tingjun2; Hao, Jiansheng1; Li, Chaoyue1; Michaelides, Roger3; Shao, Wanwan2; Wei, Sihao2; Wang, Kun2; Fan, Chengyan2 |
| 刊名 | REMOTE SENSING
 |
| 出版日期 | 2022-11-01 |
| 卷号 | 14期号:21页码:16 |
| 关键词 | active layer thickness ground-penetrating radar Tibetan Plateau permafrost engineering |
| DOI | 10.3390/rs14215606 |
| 通讯作者 | Hao, Jiansheng(haojs@igsnrr.ac.cn) |
| 英文摘要 | Active layer thickness (ALT) is a sensitive indicator of response to climate change. ALT has important influence on various aspects of the regional environment such as hydrological processes and vegetation. In this study, 57 ground-penetrating radar (GPR) sections were surveyed along the Qinghai-Tibet Engineering Corridor (QTEC) during 2018-2021, covering a total length of 58.5 km. The suitability of GPR-derived ALT was evaluated using in situ measurements and reference datasets, for which the bias and root mean square error were approximately -0.16 and 0.43 m, respectively. The GPR results show that the QTEC ALT was in the range of 1.25-6.70 m (mean: 2.49 +/- 0.57 m). Observed ALT demonstrated pronounced spatial variability at both regional and fine scales. We developed a statistical estimation model that explicitly considers the soil thermal regime (i.e., ground thawing index, TIg), soil properties, and vegetation. This model was found suitable for simulating ALT over the QTEC, and it could explain 52% (R-2 = 0.52) of ALT variability. The statistical model shows that a difference of 10 degrees C.d in root TIg is equivalent to a change of 0.67 m in ALT, and an increase of 0.1 in the normalized difference vegetation index (NDVI) is equivalent to a decrease of 0.23 m in ALT. The fine-scale (<1 km) variation in ALT could account for 77.6% of the regional-scale (approximately 550 km) variation. These results provide a timely ALT benchmark along the QTEC, which can inform the construction and maintenance of engineering facilities along the QTEC. |
| WOS关键词 | THERMAL STATE ; WATER-CONTENT ; PERMAFROST ; VEGETATION ; CLIMATE ; BARROW ; DEPTH ; INDEX ; BASIN ; MAP |
| 资助项目 | Second Tibetan Plateau Scientific Expedition and Research Program (STEP)[2019QZKK0903] ; Tibet Science and Technology Program[XZ202201ZY0011G] |
| WOS研究方向 | Environmental Sciences & Ecology ; Geology ; Remote Sensing ; Imaging Science & Photographic Technology |
| 语种 | 英语 |
| WOS记录号 | WOS:000885809800001 |
| 出版者 | MDPI |
| 资助机构 | Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Tibet Science and Technology Program |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/187448]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Hao, Jiansheng |
| 作者单位 | 1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing 100101, Peoples R China 2.Lanzhou Univ, Coll Earth & Environm Sci, Key Lab Western Chinas Environm Syst, Lanzhou 730000, Peoples R China 3.Washington Univ, Dept Earth & Planetary Sci, St Louis, MO 63130 USA |
| 推荐引用方式 GB/T 7714 | Jia, Shichao,Zhang, Tingjun,Hao, Jiansheng,et al. Spatial Variability of Active Layer Thickness along the Qinghai-Tibet Engineering Corridor Resolved Using Ground-Penetrating Radar[J]. REMOTE SENSING,2022,14(21):16. |
| APA | Jia, Shichao.,Zhang, Tingjun.,Hao, Jiansheng.,Li, Chaoyue.,Michaelides, Roger.,...&Fan, Chengyan.(2022).Spatial Variability of Active Layer Thickness along the Qinghai-Tibet Engineering Corridor Resolved Using Ground-Penetrating Radar.REMOTE SENSING,14(21),16. |
| MLA | Jia, Shichao,et al."Spatial Variability of Active Layer Thickness along the Qinghai-Tibet Engineering Corridor Resolved Using Ground-Penetrating Radar".REMOTE SENSING 14.21(2022):16. |
入库方式： OAI收割
来源：地理科学与资源研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。