Recent changes in the active layer thickness across the northern hemisphere
文献类型：期刊论文
| 作者 | Luo, Dongliang1; Wu, Qingbai1; Jin, Huijun1; Marchenko, Sergey S.1,2; Lu, Lanzhi1; Gao, Siru1 |
| 刊名 | ENVIRONMENTAL EARTH SCIENCES
 |
| 出版日期 | 2016-04-01 |
| 卷号 | 75期号:7页码:15 |
| 关键词 | Circumpolar active layer monitoring (CALM) program Active layer thickness (ALT) Northern hemisphere Cryosphere and climate change Spatiotemporal variations |
| ISSN号 | 1866-6280 |
| DOI | 10.1007/s12665-015-5229-2 |
| 通讯作者 | Luo, Dongliang(luodongliang@lzb.ac.cn) |
| 英文摘要 | To better understand the ecological and hydrological responses to climatic and cryospheric changes, the spatiotemporal variations in the active layer thickness (ALT) need to be scrupulously studied. Based on more than 230 sites from the circumpolar active layer monitoring network, the spatiotemporal characteristics of the ALT across the northern hemisphere during 1990-2015 were investigated. Results indicate that the ALT exhibits substantial spatial variations across the northern hemisphere, ranging from approximately 30 cm in the arctic and subarctic regions to greater than 10 m in the mountainous permafrost regions at mid-latitudes. Regional averages of ALT are 48 cm in Alaska, 93 cm in Canada, 164 cm in the Nordic countries (including Greenland and Svalbard) and Switzerland, 330 cm in Mongolia, 476 cm in Kazakhstan, and 230 cm on the Qinghai-Tibetan Plateau (QTP), respectively. In Russia, the regional averages of ALT in European North, West Siberia, Central Siberia, Northeast Siberia, Chukotka, and Kamchatka are 110, 92, 69, 61, 53 and 60 cm, respectively. Increasing trends of ALT were not uniformly present in the observational records. Significant changes in the ALT were observed at 73 sites, approximately 43.2 % of the investigated 169 sites that are available for statistical analysis. Less than 25 % Alaskan sites and approximately 33 % Canadian sites showed significant increase in the ALT. On the QTP, almost all the sites showed significant ALT increases. Insignificant increase and even decrease in the ALT were observed in some parts of the northern hemisphere, e.g., Mongolia, parts of Alaska and Canada. The air and ground temperatures, vegetation, substrate, microreliefs, and soil moisture in particular, play decisive roles in the spatiotemporal variations in the ALT, but the relationships among each other are complicated and await further studies. |
| 收录类别 | SCI |
| WOS关键词 | INTERNATIONAL POLAR YEAR ; NEAR-SURFACE PERMAFROST ; THERMAL STATE ; THAWING PERMAFROST ; SOIL-TEMPERATURE ; CENTRAL ALASKA ; CENTRAL-ASIA ; RIVER-BASIN ; CLIMATE ; VARIABILITY |
| WOS研究方向 | Environmental Sciences & Ecology ; Geology ; Water Resources |
| WOS类目 | Environmental Sciences ; Geosciences, Multidisciplinary ; Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:000373635400014 |
| 出版者 | SPRINGER |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2557273 |
| 专题 | 寒区旱区环境与工程研究所 |
| 通讯作者 | Luo, Dongliang |
| 作者单位 | 1.Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, State Key Lab Frozen Soil Engn, Lanzhou 730000, Gansu, Peoples R China 2.Univ Alaska Fairbanks, Inst Geophys, Fairbanks, AK 99775 USA |
| 推荐引用方式 GB/T 7714 | Luo, Dongliang,Wu, Qingbai,Jin, Huijun,et al. Recent changes in the active layer thickness across the northern hemisphere[J]. ENVIRONMENTAL EARTH SCIENCES,2016,75(7):15. |
| APA | Luo, Dongliang,Wu, Qingbai,Jin, Huijun,Marchenko, Sergey S.,Lu, Lanzhi,&Gao, Siru.(2016).Recent changes in the active layer thickness across the northern hemisphere.ENVIRONMENTAL EARTH SCIENCES,75(7),15. |
| MLA | Luo, Dongliang,et al."Recent changes in the active layer thickness across the northern hemisphere".ENVIRONMENTAL EARTH SCIENCES 75.7(2016):15. |
入库方式： iSwitch采集
来源：寒区旱区环境与工程研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。