Soil moisture as a key factor in carbon release from thawing permafrost in a boreal forest
文献类型：期刊论文
| 作者 | Song Xiaoyan1,2; Wang Genxu2 ; Ran Fei2; Huang Kewei2,3; Sun Juying2,3; Song Chunlin2
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| 刊名 | GEODERMA
 |
| 出版日期 | 2020 |
| 卷号 | 357页码:113975 |
| ISSN号 | 0016-7061 |
| 关键词 | Methane Carbon dioxide Organic carbon Active layer Incubation experiment |
| DOI | 10.1016/j.geoderma.2019.113975 |
| 产权排序 | 2 |
| 文献子类 | Article |
| 英文摘要 | The feedback between the atmosphere and permafrost soils containing large carbon stocks is currently considered the most important carbon-cycle feedback but it is missing from climate models due to many uncertainties. Knowledge of how differences in post-thaw hydrological conditions affect carbon (C) release is critical for predicting permafrost feedback but this knowledge remains limited. In this study permafrost and active layer soils from the southern margin of the Eurasian boreal permafrost region in Northeast China were collected and incubated under experimentally modified moisture to monitor their CO2 and CH4 productions under simulated natural drier and flooded conditions. We also characterized soil properties related to soil organic carbon (SOC) quality and microbial activities to determine their relations with measured C productions. We found that permafrost had higher C release per gram of SOC basis (C vulnerability) than the active layer which suggested that there would be a high risk for C emissions in the permafrost region when permafrost thaws in the warming future. However hydrological conditions following the permafrost thaw control these emissions. Permafrost C decomposed in relatively aerobic upland systems had higher C emissions than that decomposed in anaerobic wetland environments. Our results suggest a greater climate forcing of C release in aerobic than anaerobic conditions but there are some uncertainties resulting from the unknown long-term CH4 production rates. Moreover we found that the aerobic C production in permafrost after thawing could be constrained by water stress suggesting that previous predictions based on soil incubations at natural soil moisture might overestimate the aerobic permafrost C release. |
| 电子版国际标准刊号 | 1872-6259 |
| 语种 | 英语 |
| WOS记录号 | WOS:000496837300025 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/32287]  |
| 专题 | 成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室 |
| 通讯作者 | Wang Genxu |
| 作者单位 | 1.Institute of Qinghai-Tibetan Plateau, Southwest Minzu University, Chengdu 610041, China; 2.Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China; 3.University of Chinese Academy of Sciences, Beijing 100049, China |
| 推荐引用方式 GB/T 7714 | Song Xiaoyan,Wang Genxu,Ran Fei,et al. Soil moisture as a key factor in carbon release from thawing permafrost in a boreal forest[J]. GEODERMA,2020,357:113975. |
| APA | Song Xiaoyan,Wang Genxu,Ran Fei,Huang Kewei,Sun Juying,&Song Chunlin.(2020).Soil moisture as a key factor in carbon release from thawing permafrost in a boreal forest.GEODERMA,357,113975. |
| MLA | Song Xiaoyan,et al."Soil moisture as a key factor in carbon release from thawing permafrost in a boreal forest".GEODERMA 357(2020):113975. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
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