Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1007/s40333-014-0062-0 |
New evidence for the links between the local water cycle and the underground wet sand layer of a mega-dune in the Badain Jaran Desert, China | |
Wen, Jun1; Su, ZhongBo2; Zhang, TangTang1; Tian, Hui1; Zeng, YiJian2; Liu, Rong1; Kang, Yue1; van der Velde, Rogier2 | |
通讯作者 | Wen, Jun |
来源期刊 | JOURNAL OF ARID LAND
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ISSN | 1674-6767 |
EISSN | 2194-7783 |
出版年 | 2014 |
卷号 | 6期号:4页码:371-377 |
英文摘要 | Scientists and the local government have great concerns about the climate change and water resources in the Badain Jaran Desert of western China. A field study for the local water cycle of a lake-desert system was conducted near the Noertu Lake in the Badain Jaran Desert from 21 June to 26 August 2008. An underground wet sand layer was observed at a depth of 20-50 cm through analysis of datasets collected during the field experiment. Measurements unveiled that the near surface air humidity increased in the nighttime. The sensible and latent heat fluxes were equivalent at a site about 50 m away from the Noertu Lake during the daytime, with mean values of 134.4 and 105.9 W/m(2) respectively. The sensible heat flux was dominant at a site about 500 m away from the Noertu Lake, with a mean of 187.7 W/m(2), and a mean latent heat flux of only 26.7 W/m(2). There were no apparent differences for the land surface energy budget at the two sites during the night time. The latent heat flux was always negative with a mean value of -12.7 W/m(2), and the sensible heat flux was either positive or negative with a mean value of 5.10 W/m(2). A portion of the local precipitation was evaporated into the air and the top-layer of sand dried quickly after every rainfall event, while another portion seeped deep and was trapped by the underground wet sand layer, and supplied water for surface psammophyte growth. With an increase of air humidity and the occurrence of negative latent heat flux or water vapor condensation around the Noertu Lake during the nighttime, we postulated that the vapor was transported and condensed at the lakeward sand surface, and provided supplemental underground sand pore water. There were links between the local water cycle, underground wet sand layer, psammophyte growth and landscape evolution of the mega-dunes surrounding the lakes in the Badain Jaran Desert of western China. |
英文关键词 | mega-dune water cycle observation wet sand layer Badain Jaran Desert |
类型 | Article |
语种 | 英语 |
国家 | Peoples R China ; Netherlands |
收录类别 | SCI-E |
WOS记录号 | WOS:000334995200001 |
WOS关键词 | MEGADUNES ; LAKES |
WOS类目 | Environmental Sciences |
WOS研究方向 | Environmental Sciences & Ecology |
来源机构 | 中国科学院西北生态环境资源研究院 |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/183083 |
作者单位 | 1.Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Key Lab Land Surface Proc & Climate Change Cold &, Lanzhou 730000, Peoples R China; 2.Univ Twente, Fac Geoinformat Sci & Earth Observat ITC, NL-7500 AA Enschede, Netherlands |
推荐引用方式 GB/T 7714 | Wen, Jun,Su, ZhongBo,Zhang, TangTang,et al. New evidence for the links between the local water cycle and the underground wet sand layer of a mega-dune in the Badain Jaran Desert, China[J]. 中国科学院西北生态环境资源研究院,2014,6(4):371-377. |
APA | Wen, Jun.,Su, ZhongBo.,Zhang, TangTang.,Tian, Hui.,Zeng, YiJian.,...&van der Velde, Rogier.(2014).New evidence for the links between the local water cycle and the underground wet sand layer of a mega-dune in the Badain Jaran Desert, China.JOURNAL OF ARID LAND,6(4),371-377. |
MLA | Wen, Jun,et al."New evidence for the links between the local water cycle and the underground wet sand layer of a mega-dune in the Badain Jaran Desert, China".JOURNAL OF ARID LAND 6.4(2014):371-377. |
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