中文摘要：

科学家和本地政府在西方的中国的 Badain Jaran 沙漠关于气候变化和水资源有大担心。为一个湖沙漠系统的本地水周期的领域研究从 6 月 21 日在 Badain Jaran 沙漠在诺尔图·莱克附近被进行到 2008 年 8 月 26 日。地下的湿沙层通过在领域实验期间收集的数据集的分析在 2050 厘米的深度被观察。揭开的大小近的表面空气湿度在夜间增加了。理智、潜伏的热流动在一个地点是相等的大约 50 m 离开诺尔图·莱克在白天期间，与 134.4 和 105.9 W/m2 的吝啬的价值分别地。理智的热流动在一个地点是主导的大约 500 m 离开诺尔图·莱克与 187.7 W/m2 的一个平均数，并且仅仅 26.7 W/m2 的吝啬的潜伏的热流动。在夜里时间期间为在二个地点的陆地表面精力预算没有明显的差别。潜伏的热流动与 12.7 W/m2 的吝啬的价值总是是否定的，并且理智的热流动与 5.10 W/m2 的吝啬的价值积极或否定。本地降水的部分被蒸发进空气并且当另一部分深渗出并且被地下的湿沙层套住，并且为表面砂生植物生长供应了水时，在每个降雨事件以后快速弄干的沙最高层。随空气湿度和在诺尔图·莱克附近的否定的潜伏的热流动或水蒸汽冷凝作用的出现的增加在夜间期间，我们要求了蒸汽在向著湖的沙表面被搬运并且压缩，并且提供了补加的地下的沙毛孔水。在本地水周期，地下的湿沙层，砂生植物生长和在 Badain Jaran 的湖西方的中国抛弃的大沙丘的包围的风景进化之间有连接。

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/m2 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/m2, and a mean latent heat flux of only 26.7 W/m2. 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/m2, and the sensible heat flux was either positive or negative with a mean value of 5.10 W/m2. 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.