Knowledge Management System Of Institute Of Botany,CAS
| Permafrost Degradation Diminishes Terrestrial Ecosystem Carbon Sequestration Capacity on the Qinghai-Tibetan Plateau | |
Liu, Lei1,2; Zhuang, Qianlai2; Zhao, Dongsheng; Zheng, Du1; Kou, Dan2,3; Yang, Yuanhe1,4
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| 2022 | |
| 发表期刊 | GLOBAL BIOGEOCHEMICAL CYCLES
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| ISSN | 0886-6236 |
| 卷号 | 36期号:2 |
| 摘要 | Effects of permafrost degradation on carbon (C) and nitrogen (N) cycling on the Qinghai-Tibetan Plateau (QTP) have rarely been analyzed. This study used a revised process-based biogeochemical model to quantify the effects in the region during the 21st century. We found that permafrost degradation would expose 0.61 +/- 0.26 (mean +/- SD) and 1.50 +/- 0.15 Pg C of soil organic carbon under the representative concentration pathway (RCP) 4.5 and the RCP 8.5, respectively. Among them, more than 20% will be decomposed, enhancing heterotrophic respiration by 8.62 +/- 4.51 (RCP 4.5) and 33.66 +/- 14.03 (RCP 8.5) Tg C/yr in 2099. Deep soil N supply due to thawed permafrost is not accessible to plants, only stimulating net primary production by 7.15 +/- 4.83 (RCP 4.5) and 24.27 +/- 9.19 (RCP 8.5) Tg C/yr in 2099. As a result, the single effect of permafrost degradation would cumulatively weaken the regional C sink by 209.44 +/- 137.49 (RCP 4.5) and 371.06 +/- 151.70 (RCP 8.5) Tg C during 2020-2099. However, when factors of climate change, CO2 increasing and permafrost degradation are all considered, the permafrost region on the QTP would be a stronger C sink in the 21st century. Permafrost degradation has a greater influence on C balance of alpine meadows than alpine steppes on the QTP. The shallower active layer, higher soil C and N stocks, and wetter environment in alpine meadows are responsible for its stronger response to permafrost degradation. This study highlights that permafrost degradation could continue to release large amounts of C to the atmosphere irrespective of potentially more nitrogen available from deep soils. |
| 关键词 | Permafrost degradation C-N feedbacks deep soil Tibetan Plateau |
| 学科领域 | Environmental Sciences ; Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences |
| DOI | 10.1029/2021GB007068 |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS关键词 | NET PRIMARY PRODUCTIVITY ; SOIL ORGANIC-CARBON ; CLIMATE-CHANGE ; ALPINE MEADOW ; ATMOSPHERIC CO2 ; NITROGEN AVAILABILITY ; DYNAMICS ; SENSITIVITY ; MODEL ; VARIABILITY |
| WOS研究方向 | Science Citation Index Expanded (SCI-EXPANDED) |
| WOS记录号 | WOS:000765649200007 |
| 出版者 | AMER GEOPHYSICAL UNION |
| 文献子类 | Article |
| 出版地 | WASHINGTON |
| EISSN | 1944-9224 |
| 资助机构 | Second Tibetan Plateau Scientific Expedition and Research Program [2019QZKK0403] ; National Natural Science Foundation of China [41571193] ; Strategic Priority Research Program of the Chinese Academy of Sciences [XDA20020202] ; China Scholarship Council |
| 作者邮箱 | zhaods@igsnrr.ac.cn |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.ibcas.ac.cn/handle/2S10CLM1/28928 |
| 专题 | 植被与环境变化国家重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China 3.Purdue Univ, Dept Earth Atmospher & Planetary Sci, W Lafayette, IN 47907 USA 4.Univ Eastern Finland, Dept Environm & Biol Sci, Biogeochem Res Grp, Kuopio, Finland 5.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Lei,Zhuang, Qianlai,Zhao, Dongsheng,et al. Permafrost Degradation Diminishes Terrestrial Ecosystem Carbon Sequestration Capacity on the Qinghai-Tibetan Plateau[J]. GLOBAL BIOGEOCHEMICAL CYCLES,2022,36(2). |
| APA | Liu, Lei,Zhuang, Qianlai,Zhao, Dongsheng,Zheng, Du,Kou, Dan,&Yang, Yuanhe.(2022).Permafrost Degradation Diminishes Terrestrial Ecosystem Carbon Sequestration Capacity on the Qinghai-Tibetan Plateau.GLOBAL BIOGEOCHEMICAL CYCLES,36(2). |
| MLA | Liu, Lei,et al."Permafrost Degradation Diminishes Terrestrial Ecosystem Carbon Sequestration Capacity on the Qinghai-Tibetan Plateau".GLOBAL BIOGEOCHEMICAL CYCLES 36.2(2022). |
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