Carbon loss and chemical changes from permafrost collapse in the northern Tibetan Plateau
文献类型：期刊论文
| 作者 | Mu, Cuicui1; Zhang, Tingjun1; Zhang, Xiankai1; Li, Lili1; Guo, Hong1; Zhao, Qian1; Cao, Lin1; Wu, Qingbai2; Cheng, Guodong2 |
| 刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
 |
| 出版日期 | 2016-07-01 |
| 卷号 | 121期号:7页码:1781-1791 |
| 关键词 | permafrost Qinghai-Tibetan Plateau soil organic carbon permafrost collapse CO2 production |
| ISSN号 | 2169-8953 |
| DOI | 10.1002/2015JG003235 |
| 通讯作者 | Zhang, Tingjun(tjzhang@lzu.edu.cn) |
| 英文摘要 | Permafrost collapse, known as thermokarst, can alter soil properties and carbon emissions. However, little is known regarding the effects of permafrost collapse in upland landscapes on the biogeochemical processes that affect carbon balance. In this study, we measured soil carbon and physiochemical properties at a large thermokarst feature on a hillslope in the northeastern Tibetan Plateau. We categorized surfaces into three different microrelief patches based on type and extent of collapse (control, drape, and exposed areas). Permafrost collapse resulted in substantial decreases of surface soil carbon and nitrogen stocks, with losses of 29.64.2% and 28.93.1% for carbon and nitrogen, respectively, in the 0-10cm soil layer. Laboratory incubation experiments indicated that control soil had significantly higher CO2 production rates than that of drapes. The results from Fourier transform infrared spectroscopy analysis showed that exposed soils accumulated some organic matter due to their low position within the feature, which was accompanied by substantial changes in the chemical structure and characteristics of the soil carbon. Exposed soils had higher hydrocarbon and lignin/phenol backbone content than in control and drape soils in the 0-10cm layer. This study demonstrates that permafrost collapse can cause abundant carbon and nitrogen loss, potentially from mineralization, leaching, photodegradation, and lateral displacement. These results demonstrate that permafrost collapse redistributes the soil organic matter, changes its chemical characteristics, and leads to losses of organic carbon due to the greenhouse gas emission. |
| 收录类别 | SCI |
| WOS关键词 | SOIL ORGANIC-MATTER ; HEIHE RIVER-BASIN ; NORTHWESTERN CHINA ; ACTIVE-LAYER ; UPPER REACH ; THAW SLUMP ; NITROGEN ; MINERALIZATION ; CLIMATE ; REGIONS |
| WOS研究方向 | Environmental Sciences & Ecology ; Geology |
| WOS类目 | Environmental Sciences ; Geosciences, Multidisciplinary |
| 语种 | 英语 |
| WOS记录号 | WOS:000382581900005 |
| 出版者 | AMER GEOPHYSICAL UNION |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2557444 |
| 专题 | 寒区旱区环境与工程研究所 |
| 通讯作者 | Zhang, Tingjun |
| 作者单位 | 1.Lanzhou Univ, Coll Earth & Environm Sci, Key Lab Western Chinas Environm Syst, Minist Educ, Lanzhou, Peoples R China 2.Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, State Key Lab Frozen Soil Engn, Lanzhou, Peoples R China |
| 推荐引用方式 GB/T 7714 | Mu, Cuicui,Zhang, Tingjun,Zhang, Xiankai,et al. Carbon loss and chemical changes from permafrost collapse in the northern Tibetan Plateau[J]. JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,2016,121(7):1781-1791. |
| APA | Mu, Cuicui.,Zhang, Tingjun.,Zhang, Xiankai.,Li, Lili.,Guo, Hong.,...&Cheng, Guodong.(2016).Carbon loss and chemical changes from permafrost collapse in the northern Tibetan Plateau.JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,121(7),1781-1791. |
| MLA | Mu, Cuicui,et al."Carbon loss and chemical changes from permafrost collapse in the northern Tibetan Plateau".JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES 121.7(2016):1781-1791. |
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来源：寒区旱区环境与工程研究所
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