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| DOI | 10.1016/j.earscirev.2020.103433 |
| The status and stability of permafrost carbon on the Tibetan Plateau | |
| Mu C.; Abbott B.W.; Norris A.J.; Mu M.; Fan C.; Chen X.; Jia L.; Yang R.; Zhang T.; Wang K.; Peng X.; Wu Q.; Guggenberger G.; Wu X. | |
| 发表日期 | 2020 |
| ISSN | 00128252 |
| 卷号 | 211 |
| 英文摘要 | Permafrost regions at high latitudes and altitudes store about half of the Earth's soil organic carbon (SOC). These areas are also some of the most intensely affected by anthropogenic climate change. The Tibetan Plateau or Third Pole (TP) contains most of the world's alpine permafrost, yet there remains substantial uncertainty about the role of this region in regulating the overall permafrost climate feedback. Here, we review the thermal and biogeochemical status of permafrost on the TP, with a particular focus on SOC stocks and vulnerability in the face of climate warming. SOC storage in permafrost-affected regions of the TP is estimated to be 19.0±6.6 Pg to a depth of 2 m. The distribution of this SOC on the TP is strongly associated with active layer thickness, soil moisture, soil texture, topographic position, and thickness of weathered parent material. The mean temperature sensitivity coefficient (Q10) of SOC decomposition is 9.2±7.1 across different soil depths and under different land-cover types, suggesting that carbon on the TP is very vulnerable to climate change. While the TP ecosystem currently is a net carbon sink, climate change will likely increase ecosystem respiration and may weaken or reverse the sink function of this region in the future. Although the TP has less ground ice than high latitude permafrost regions, the rugged topography makes it vulnerable to widespread permafrost collapse and thermo-erosion (thermokarst), which accelerates carbon losses. To reduce uncertainty about SOC quantities and sensitivity to warming, future studies are needed that explain variation in Q10 (e.g. based on SOC source or depositional position) and quantify the role of nutrient availability in regulating SOC dynamics and ecosystem recovery following disturbance. Additionally, as for the high latitude permafrost region, soil moisture and thermokarst formation remain major challenges to predicting the permafrost climate feedback on the TP. We present a conceptual model for of greenhouse gas release from the TP and outline the empirical observations and modeling approaches needed to test it. © 2020 Elsevier B.V. |
| 关键词 | greenhouse gaspermafrostSoil organic carbontemperature sensitivitythaw slumps, thermokarst lakesTibetan Plateau |
| 英文关键词 | biogeochemical cycle; global warming; greenhouse gas; organic carbon; permafrost; slumping; soil carbon; soil temperature; thermokarst; China; Qinghai-Xizang Plateau; Matthiola |
| 语种 | 英语 |
| 来源期刊 | Earth Science Reviews
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/203825 |
| 作者单位 | Key Laboratory of Western China's Environmental Systems (Ministry of Education), College of Earth and Environmental Sciences, Lanzhou University, Lanzhou, 730000, China; Cryosphere Research Station on Qinghai-Tibetan Plateau, State Key Laboratory of Cryospheric Science, Northwest Institute of Eco-Environment and Resource, Chinese Academy of Sciences, Lanzhou, 730000, China; State Key Laboratory of frozen soil engineering, Northwest Institute of Eco-Environment and Resource, Chinese Academy of Sciences, Lanzhou, 730000, China; Department of Plant and Wildlife Sciences, Brigham Young University, Provo, UT 84602, United States; Southern Marine Science and Engineering Guangdong Laboratory, Zhuhai, 519000, China; School of Geographic Sciences, East China Normal University, Shanghai, 200241, China; University Cooperation of Polar Research, Beijing, 100875, China; Institute of Soil Science, Leibniz Universität Hannover, Herrenhäuser Straße 2, Hannover, 30419, Germany; University of Chinese Academy of Sciences, ... |
| 推荐引用方式 GB/T 7714 | Mu C.,Abbott B.W.,Norris A.J.,et al. The status and stability of permafrost carbon on the Tibetan Plateau[J],2020,211. |
| APA | Mu C..,Abbott B.W..,Norris A.J..,Mu M..,Fan C..,...&Wu X..(2020).The status and stability of permafrost carbon on the Tibetan Plateau.Earth Science Reviews,211. |
| MLA | Mu C.,et al."The status and stability of permafrost carbon on the Tibetan Plateau".Earth Science Reviews 211(2020). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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