A naturally-occurring 'cold earth' spot in Northern China
文献类型：期刊论文
| 作者 | Niu, Fujun; Cheng, Guodong; Niu, Yonghong; Zhang, Mingyi; Luo, Jing; Lin, Zhanju |
| 刊名 | SCIENTIFIC REPORTS
 |
| 出版日期 | 2016-09-29 |
| 卷号 | 6页码:7 |
| ISSN号 | 2045-2322 |
| DOI | 10.1038/srep34184 |
| 通讯作者 | Niu, Fujun(niufujun@lzb.ac.cn) |
| 英文摘要 | Permafrost is determined to a large extent by the Earth's surface temperature, therefore it distributes mainly in high altitude and latitude regions. However, stable, warm (about -1 degrees C) permafrost occurs within a scree slope in northern China that is more than 600 km south of the southernmost limit of latitudinal permafrost on the Eurasian Continent. It is at an elevation of only 900 m above sea level (ASL). The area has a mean annual air temperature (MAAT) of 6 to 8 degrees C. Thermal processes of the scree slope, investigated through field monitoring and numerical simulation, showed that the permafrost is caused by winter air convection within the porous rock deposits and is stable as air convection does not occur in summer time. The deposit is covered by a 30-cm-thick peaty soil layer dated (carbon C-14) to between 1,000 to 1,600 years ago. The layer also contributes to the permafrost's existence due to the peat's thermal conductivity offset when frozen and thawed. The existence of permafrost under such warm climatic conditions confirms the effectiveness of using crushed rock layer as basement or slope cover to protect the warm permafrost subgrade of the recently-constructed Qinghai-Tibet Railway (QTR), even under the predicted climate warming conditions. |
| 收录类别 | SCI |
| WOS关键词 | THERMAL REGIME ; PERMAFROST REGIONS ; BLOCKY MATERIALS ; CLIMATE-CHANGE ; SWISS ALPS ; MOUNTAINS ; EMBANKMENTS ; DEGRADATION ; PLATEAU ; SLOPES |
| WOS研究方向 | Science & Technology - Other Topics |
| WOS类目 | Multidisciplinary Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000384176500001 |
| 出版者 | NATURE PUBLISHING GROUP |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2557450 |
| 专题 | 寒区旱区环境与工程研究所 |
| 通讯作者 | Niu, Fujun |
| 作者单位 | Chinese Acad Sci, State Key Lab Frozen Soil Engn, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China |
| 推荐引用方式 GB/T 7714 | Niu, Fujun,Cheng, Guodong,Niu, Yonghong,et al. A naturally-occurring 'cold earth' spot in Northern China[J]. SCIENTIFIC REPORTS,2016,6:7. |
| APA | Niu, Fujun,Cheng, Guodong,Niu, Yonghong,Zhang, Mingyi,Luo, Jing,&Lin, Zhanju.(2016).A naturally-occurring 'cold earth' spot in Northern China.SCIENTIFIC REPORTS,6,7. |
| MLA | Niu, Fujun,et al."A naturally-occurring 'cold earth' spot in Northern China".SCIENTIFIC REPORTS 6(2016):7. |
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来源：寒区旱区环境与工程研究所
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