干旱区生态环境知识资源中心(Arid): 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

Arid

	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 Jun; Su Zhongbo; Zhang Tangtang; Tian Hui; Zeng Yijian; Liu Rong; Kang Yue; Velde Van Der Rogier
来源期刊	Journal of Arid Land
ISSN	1674-6767
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
开放获取类型	Bronze
收录类别	CSCD
WOS研究方向	Mineralogy
CSCD记录号	CSCD:5169092
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335363
作者单位	Wen Jun, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Chinese Academy of Sciences,Key Laboratory of Land Surface Process and Climate Change in Cold and Arid Regions, Lanzhou, Gansu 730000, China.; Zhang Tangtang, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Chinese Academy of Sciences,Key Laboratory of Land Surface Process and Climate Change in Cold and Arid Regions, Lanzhou, Gansu 730000, China.; Tian Hui, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Chinese Academy of Sciences,Key Laboratory of Land Surface Process and Climate Change in Cold and Arid Regions, Lanzhou, Gansu 730000, China.; Liu Rong, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Chinese Academy of Sciences,Key Laboratory of Land Surface Process and Climate Change in Cold and Arid Regions, Lanzhou, Gansu 730000, China.;...
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],2014,6(4):371-377.
APA	Wen Jun.,Su Zhongbo.,Zhang Tangtang.,Tian Hui.,Zeng Yijian.,...&Velde Van Der 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.