Relict Mountain Permafrost Area (Loess Plateau, China) Exhibits High Ecosystem Respiration Rates and Accelerating Rates in Response to Warming
文献类型：期刊论文
| 作者 | Mu, Cuicui1,2; Wu, Xiaodong2; Zhao, Qian1; Smoak, Joseph M.3; Yang, Yulong1; Hu, Lian1; Zhong, Wen1; Liu, Guimin4; Xu, Haiyan4; Zhang, Tingjun1 |
| 刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
 |
| 出版日期 | 2017-10-01 |
| 卷号 | 122期号:10页码:2580-2592 |
| 关键词 | relict permafrost ecosystem respiration temperature sensitivity freeze-thaw process experimental warming |
| ISSN号 | 2169-8953 |
| DOI | 10.1002/2017JG004060 |
| 通讯作者 | Wu, Xiaodong(wxd565@163.com) |
| 英文摘要 | Relict permafrost regions are characterized by thin permafrost and relatively high temperatures. Understanding the ecosystem respiration rate (ERR) and its relationship with soil hydrothermal conditions in these areas can provide knowledge regarding the permafrost carbon cycle in a warming world. In this study, we examined a permafrost area, a boundary area, and a seasonally frozen ground area within a relict permafrost region on the east edge of the Qinghai-Tibetan Plateau, China. Measurements from July 2015 to September 2016 showed that the mean annual ecosystem CO2 emissions for the boundary area were greater than the permafrost area. The Q(10) value of the ERRs in the seasonally frozen ground area was greater than the permafrost area, indicating that the carbon emissions in the nonpermafrost areas were more sensitive to warming. The 1year open-top chamber (OTC) warming increased soil temperatures in both the permafrost and seasonally frozen ground areas throughout the year, and the warming increased the ERRs by 1.18 (0.99-1.38, with interquartile range) and 1.13 (0.75-1.54, with interquartile range) molCO(2)m(-2)s(-1) in permafrost and seasonally frozen ground areas, respectively. The OTC warming increased annual ERRs by approximately 50% for both permafrost and seasonally frozen ground areas with half the increase occurring during the nongrowing seasons. These results suggest that the ERRs in relict permafrost are high in comparison with arctic regions, and the carbon balance in relict permafrost areas could be greatly changed by climate warming. Plain Language Summary Permafrost degradation is a process of temperature increasing of soils and then shift from frozen to thaw state; thus, studying the soil carbon emissions in relict permafrost will provide us knowledge about the permafrost carbon feedback under a warming world. Here we showed that the soil carbon emissions in relict permafrost area are high, and the experimental warming showed that the soil carbon emissions were more pronounced in nonpermafrost area than those of permafrost area. Our results suggested that soil carbon release in relict permafrost is high, and the carbon balance in relict permafrost areas could be greatly changed by climate warming. |
| 收录类别 | SCI |
| WOS关键词 | QINGHAI-TIBETAN PLATEAU ; SOIL ORGANIC-CARBON ; MATTER DECOMPOSITION ; PRIMARY PRODUCTIVITY ; CLIMATE-CHANGE ; ARCTIC TUNDRA ; ACTIVE LAYER ; TEMPERATURE ; VEGETATION ; REGION |
| 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:000414961500008 |
| 出版者 | AMER GEOPHYSICAL UNION |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2557638 |
| 专题 | 寒区旱区环境与工程研究所 |
| 通讯作者 | Wu, Xiaodong |
| 作者单位 | 1.Lanzhou Univ, Coll Earth & Environm Sci, Key Lab Western Chinas Environm Syst, Minist Educ, Lanzhou, Gansu, Peoples R China 2.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Cryosphere Res Stn Qinghai Tibet Plateau, State Key Lab Cryospher Sci, Lanzhou, Gansu, Peoples R China 3.Univ S Florida, Environm Sci, St Petersburg, FL USA 4.Lanzhou Jiaotong Univ, Sch Environm & Municipal Engn, Lanzhou, Gansu, Peoples R China |
| 推荐引用方式 GB/T 7714 | Mu, Cuicui,Wu, Xiaodong,Zhao, Qian,et al. Relict Mountain Permafrost Area (Loess Plateau, China) Exhibits High Ecosystem Respiration Rates and Accelerating Rates in Response to Warming[J]. JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,2017,122(10):2580-2592. |
| APA | Mu, Cuicui.,Wu, Xiaodong.,Zhao, Qian.,Smoak, Joseph M..,Yang, Yulong.,...&Zhang, Tingjun.(2017).Relict Mountain Permafrost Area (Loess Plateau, China) Exhibits High Ecosystem Respiration Rates and Accelerating Rates in Response to Warming.JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,122(10),2580-2592. |
| MLA | Mu, Cuicui,et al."Relict Mountain Permafrost Area (Loess Plateau, China) Exhibits High Ecosystem Respiration Rates and Accelerating Rates in Response to Warming".JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES 122.10(2017):2580-2592. |
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来源：寒区旱区环境与工程研究所
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