Climate Change Data Portal
| DOI | 10.1038/s41561-022-00952-z |
| Sub-aerial talik formation observed across the discontinuous permafrost zone of Alaska | |
| Farquharson L.M.; Romanovsky V.E.; Kholodov A.; Nicolsky D. | |
| 发表日期 | 2022 |
| ISSN | 1752-0894 |
| 起始页码 | 475 |
| 结束页码 | 481 |
| 卷号 | 15期号:6 |
| 英文摘要 | Talik formation has long been acknowledged as an important mechanism of permafrost degradation. Currently, a lack of in situ observations has left a critical gap in our understanding of how ongoing climate change may influence future sub-aerial talik formation in areas unaffected by water bodies or wildfire. Here we present in situ ground temperature measurements from undisturbed sub-aerial sites across the discontinuous permafrost zone of Alaska between 1999 and 2020. We find that novel taliks formed at 24 sites across the region, with widespread initiation occurring during the winter of 2018 due to higher air temperatures and above-average snowfall insulating the soil. Future projections under a high emissions scenario show that by 2030, talik formation will initiate across up to 70% of the discontinuous permafrost zone, regardless of snow conditions. By 2090, talik in areas of black spruce forest, and warmer ecosystems, may reach a thickness of 12 m. The establishment of widespread sub-aerial taliks has major implications for permafrost thaw, thermokarst development, carbon cycling, hydrological connectivity and engineering. © 2022, The Author(s), under exclusive licence to Springer Nature Limited. |
| 语种 | 英语 |
| scopus关键词 | climate change; permafrost; spatiotemporal analysis; thermokarst; Alaska; United States |
| 来源期刊 | Nature Geoscience
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/262186 |
| 作者单位 | Geophysical Institute Permafrost Laboratory, University of Alaska Fairbanks, Fairbanks, AK, United States |
| 推荐引用方式 GB/T 7714 | Farquharson L.M.； Romanovsky V.E.； Kholodov A.； Nicolsky D.. Sub-aerial talik formation observed across the discontinuous permafrost zone of Alaska[J],2022,15(6). |
| APA | Farquharson L.M.； Romanovsky V.E.； Kholodov A.； Nicolsky D..(2022).Sub-aerial talik formation observed across the discontinuous permafrost zone of Alaska.Nature Geoscience,15(6). |
| MLA | Farquharson L.M.； Romanovsky V.E.； Kholodov A.； Nicolsky D.."Sub-aerial talik formation observed across the discontinuous permafrost zone of Alaska".Nature Geoscience 15.6(2022). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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。
