Variations of Surface Atmospheric Variables and Energy Budget during a Sandstorm Passing Dunhuang on June 6 of 2000
2000年6月4日沙尘暴过境时敦煌地面气象要素及地表能量平衡特征的变化

An intensive observation period (IOP) of "The Experiment of Air-Land Interaction in Typical Arid Area of China" was carried out in Dunhuang area of Northwest China from May to June of 2000. Based on the experiment dataset investigation, the characteristics of surface atmospheric varia-bles and energy budget were analyzed during a sandstorm. The results showed that the wind direction experienced difference phases during the sandstorm. The wind speed decreased at adjust phases but increased at stable phases and with strong upward airflow. The air was hot and dry with low pressure be-fore the sandstorm, but cold and wet with high pressure during the sandstorm. The surface net radiation was low due to high density of sand particles in the air, The surface sensible and latent heat flux became weak. The soil transferred heat from deep layer to the surface the whole day and night time during the sandstorm,