Response of active layer thickening to wildfire in the pan-Arctic region: Permafrost type and vegetation type influences
文献类型：期刊论文
| 作者 | Jiang, Xiao1,2; Cai, Hongyan1; Yang, Xiaohuan1,2 |
| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
 |
| 出版日期 | 2023-12-01 |
| 卷号 | 902页码:11 |
| ISSN号 | 0048-9697 |
| 关键词 | Wildfires Active layer thickness Permafrost degradation Permafrost type Vegetation type Pan-Arctic |
| DOI | 10.1016/j.scitotenv.2023.166132 |
| 通讯作者 | Cai, Hongyan(caihy@igsnrr.ac.cn) |
| 英文摘要 | Northern high-latitude permafrost holds the largest soil carbon pool in the world. Understanding the responses of permafrost to wildfire is crucial for improving our ability to predict permafrost degradation and further carbon emissions. Recently, studies have demonstrated that wildfires in the pan-Arctic region induced the thickening of the active layer based on site or fire event observations. However, how this induced thickening is influenced by vegetation and permafrost types remains not fully understood due to the lack of wall-to-wall analysis. Therefore, this study employed remotely sensed fire data and modelled active layer thickness (ALT) to identify the fireinduced ALT change (& UDelta;ALT) for the pan-Arctic region, and the contributions of vegetation and permafrost were quantified using the random forest (RF) model. Our results showed that the average & UDelta;ALT and the sensitivity of & UDelta;ALT to burn severity both increased with decreasing ground ice content in permafrost. The largest values were detected in thick permafrost with low ground ice content. Regarding vegetation, the average and sensitivity of & UDelta;ALT in tundra were highest, followed by those in forest and shrub. When the individual environmental factors were all taken into account, the results showed that the contribution of vegetation types was much higher than that of permafrost types (20.2 % vs. 3.5 %). Our findings highlighted the importance of environmental factors in regulating the responses of permafrost to fire. |
| WOS关键词 | ELECTRICAL-RESISTIVITY TOMOGRAPHY ; GROUND TEMPERATURES ; CLIMATE-CHANGE ; FOREST-FIRE ; ICE-RICH ; SENSITIVITY ; DEGRADATION ; DYNAMICS ; THAW ; IMPACTS |
| 资助项目 | Key Projects of Innovation LREIS[KPI009] ; Key Projects of Innovation LREIS[KPI011] |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| 出版者 | ELSEVIER |
| WOS记录号 | WOS:001062189400001 |
| 资助机构 | Key Projects of Innovation LREIS |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/196854]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Cai, Hongyan |
| 作者单位 | 1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, State Key Lab Resources & Environm Informat Syst, Beijing 100101, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Jiang, Xiao,Cai, Hongyan,Yang, Xiaohuan. Response of active layer thickening to wildfire in the pan-Arctic region: Permafrost type and vegetation type influences[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2023,902:11. |
| APA | Jiang, Xiao,Cai, Hongyan,&Yang, Xiaohuan.(2023).Response of active layer thickening to wildfire in the pan-Arctic region: Permafrost type and vegetation type influences.SCIENCE OF THE TOTAL ENVIRONMENT,902,11. |
| MLA | Jiang, Xiao,et al."Response of active layer thickening to wildfire in the pan-Arctic region: Permafrost type and vegetation type influences".SCIENCE OF THE TOTAL ENVIRONMENT 902(2023):11. |
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。