• 水文与气候 •

巴丹吉林沙漠典型湖泊湖气界面水一热交换特征

1. 1. 兰州大学资源环境学院, 兰州大学干旱区气候变化与水循环研究中心,兰州 730000
2. 新疆师范大学地理科学与旅游学院,乌鲁木齐 830054
• 出版日期:2015-08-25 发布日期:2015-08-25
• 作者简介:

作者简介：胡文峰(1978-),男,安徽太湖县人,博士研究生,主要从事湍流与通量研究,E-mail: huwf12@lzu.edu.cn

• 基金资助:
国家自然科学基金项目(41371114);兰州大学中央高校基本科研业务费专项资金项目(lzujbky-2014-275);国家环保公益性行业科研专项(201209034)

Water-heat exchange over a typical lake in Badain Jaran Desert, China

HU Wenfeng1(), WANG Nai'ang1,2,*(), ZHAO Liqiang1, NING Kai1, ZHANG Xunhe1, SUN Jie1

1. 1. College of Earth and Environmental Science, Center for Climate Change and Hydrologic Cycle in Arid Region, Lanzhou University, Lanzhou 730000, China
2. College of Geographic Science and Tourism, Xinjiang Normal University, Urumqi 830054, China
• Online:2015-08-25 Published:2015-08-25
• Contact: WANG Nai'ang E-mail:huwf12@lzu.edu.cn;wangna@lzu.edu.cn

Abstract:

Using turbulence data from August 2012 to July 2013 collected through the eddy covariance system over a closed lake in the Badain Jaran Desert, this study analyzed the characteristics of the turbulence variance, meteorological elements, and turbulent heat fluxes, and calculated the evaporation of the lake. The results show that: local circulation on the lake showed a diurnal variation; standard deviation of the three-dimensional wind speed versus stability(Z/L) was in agreement with the "1/3" law, and support the Monin-Obukov similarity theory. Each component of the radiation fluxes has clearseasonal and diurnal variations. Energy distribution differed during ice period and non-ice period. The lake transfers the stored energy to the atmosphere in the winter. Latent heat flux has clearseasonal variation and sensible heat flux did not change significantly, but both showed significant diurnal variations. Sensible heat flux has periodic positive and negative diurnal variation from March to August. It was mainly delivered from the lake to the atmosphere from September to January, and had no significant diurnal variation from December to February. Latent heat flux in the summer was much larger than in the winter. It was lowest in a day at 6:00-8:00 and reached the peak at 15:00-16:00. Sensible and latent heat flux diurnal variationsshow anegative correlation. Effective energy of the lake was mainly allocated for latent heat flux. The average evaporation was 3.97 mm/d and the cumulative evaporation was 1450±10 mm a year. The total evaporation exceeded the cumulative precipitation 20-folds during the same period. The existence of the lake not only relies on rainfall and runoff from the local area, but also groundwater replenishment. The results of this study may provide some references for the lake water circulation and sources in the BadainJaran Desert.