Climate Change Data Portal
| DOI | 10.5194/tc-18-1773-2024 |
| InSAR-measured permafrost degradation of palsa peatlands in northern Sweden | |
| 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 | Climate warming is degrading palsa peatlands across the circumpolar permafrost region. Permafrost degradation may lead to ecosystem collapse and potentially strong climate feedbacks, as this ecosystem is an important carbon store and can transition to being a strong greenhouse gas emitter. Landscape-level measurement of permafrost degradation is needed to monitor this impact of warming. Surface subsidence is a useful metric of change in palsa degradation and can be monitored using interferometric synthetic-aperture radar (InSAR) satellite technology. We combined InSAR data, processed using the ASPIS algorithm to monitor ground motion between 2017 and 2021, with airborne optical and lidar data to investigate the rate of subsidence across palsa peatlands in northern Sweden. We show that 55 % of Sweden's eight largest palsa peatlands are currently subsiding, which can be attributed to the underlying permafrost landforms and their degradation. The most rapid degradation has occurred in the largest palsa complexes in the most northern part of the region of study, also corresponding to the areas with the highest percentage of palsa cover within the overall mapped wetland area. Further, higher degradation rates have been found in areas where winter precipitation has increased substantially. The roughness index calculated from a lidar-derived digital elevation model (DEM), used as a proxy for degradation, increases alongside subsidence rates and may be used as a complementary proxy for palsa degradation. We show that combining datasets captured using remote sensing enables regional-scale estimation of ongoing permafrost degradation, an important step towards estimating the future impact of climate change on permafrost-dependent ecosystems. |
| 语种 | 英语 |
| WOS研究方向 | Physical Geography ; Geology |
| WOS类目 | Geography, Physical ; Geosciences, Multidisciplinary |
| WOS记录号 | WOS:001203442800001 |
| 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/289261 |
| 作者单位 | University of Nottingham; University of Nottingham; Umea University; University of Nottingham; University of Hong Kong |
| 推荐引用方式 GB/T 7714 | . InSAR-measured permafrost degradation of palsa peatlands in northern Sweden[J],2024,18(4). |
| APA | (2024).InSAR-measured permafrost degradation of palsa peatlands in northern Sweden.CRYOSPHERE,18(4). |
| MLA | "InSAR-measured permafrost degradation of palsa peatlands in northern Sweden".CRYOSPHERE 18.4(2024). |
| 条目包含的文件 | 条目无相关文件。 | |||||
| 个性服务 |
| 推荐该条目 |
| 保存到收藏夹 |
| 导出为Endnote文件 |
| 谷歌学术 |
| 谷歌学术中相似的文章 |
| 百度学术 |
| 百度学术中相似的文章 |
| 必应学术 |
| 必应学术中相似的文章 |
| 相关权益政策 |
| 暂无数据 |
| 收藏/分享 |
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。
