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| DOI | 10.5194/tc-18-1753-2024 |
| Modelling present and future rock wall permafrost distribution in the Sisimiut mountain area, West Greenland | |
| 发表日期 | 2024 |
| ISSN | 1994-0416 |
| EISSN | 1994-0424 |
| 起始页码 | 18 |
| 结束页码 | 4 |
| 卷号 | 18期号:4 |
| 英文摘要 | Degrading rock wall permafrost was found responsible for the increase in rockfall and landslide activity in several cold mountain regions across the globe. In Greenland, rock wall permafrost has so far received little attention from the scientific community, despite mountains being a predominant feature on the ice-free coastline and landslide activity being significant. In this study, we aim to make a first step towards a better understanding of rock wall permafrost in Greenland by modelling rock wall temperatures in the mountain area around the town of Sisimiut, which is 68 degrees N on the west coast of Greenland. We first acquire rock surface temperature (RST) data for the period September 2020-September 2022 to model rock surface temperatures from weather forcing. The model is then applied to weather data from 1870 to 2022, generating rock surface temperatures to force transient heat transfer simulations over the same period. By extrapolating this method at the landscape scale, we obtain permafrost distribution maps and ad hoc simulations for complex topographies. Our model results are compared to temperature data from two lowland boreholes (100 m depth) and geophysical data describing frozen and unfrozen conditions across a mid-elevation mountain ridge. Finally, we use regional carbon pathway scenarios 2.6 and 8.5 to evaluate future evolution of rock wall temperatures until the end of the 21st century. Our data and simulation describe discontinuous permafrost distribution in rock walls up to roughly 400 m a.s.l. Future scenarios suggest a decline of deep frozen bodies up to 800 m a.s.l., i.e. the highest summits in the area. In summary, this study depicts a picture of warm permafrost in this area, highlighting its sensitivity to ongoing climate change. |
| 语种 | 英语 |
| WOS研究方向 | Physical Geography ; Geology |
| WOS类目 | Geography, Physical ; Geosciences, Multidisciplinary |
| WOS记录号 | WOS:001202158700001 |
| 来源期刊 | CRYOSPHERE
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/303189 |
| 作者单位 | Technical University of Denmark; Centre National de la Recherche Scientifique (CNRS); CNRS - Institute of Ecology & Environment (INEE); Universite Savoie Mont Blanc; Communaute Universite Grenoble Alpes; Universite Grenoble Alpes (UGA) |
| 推荐引用方式 GB/T 7714 | . Modelling present and future rock wall permafrost distribution in the Sisimiut mountain area, West Greenland[J],2024,18(4). |
| APA | (2024).Modelling present and future rock wall permafrost distribution in the Sisimiut mountain area, West Greenland.CRYOSPHERE,18(4). |
| MLA | "Modelling present and future rock wall permafrost distribution in the Sisimiut mountain area, West Greenland".CRYOSPHERE 18.4(2024). |
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