沙漠人工植被和流动沙丘的小气候特征观测研究

STUDY ON MICROCLIMATE OF THE ARTIFICIAL VEGETATION OVER SAND DUNDS IN SHAPOTOU AREA

本文利用1992年8月在中国科学院沙坡头治沙试验研究站沙漠人工植被防护体系和流动沙丘下垫面近地面层的微气象观测资料，分析了其小气候特征，效应的物理机制及实际和理论意义．

The microclimatic charactex and effects of the artificial vegetation over sand dunes in Shapotou area were analyzed. The results may be summarized as follows: 1. The air temperature, vapour pressure and temperature of surface soil in the area where the sand dunes covered by the artificial vegetation are higher during daytime and lower during night than that on bare sand dune surface. 2. The wind velocities decrease for 55%, 32%,24% and 19% at 0.5, 1. 0, 1. 5 and 2. 0 meters respectively over the artificial vegetation. 3. The soil heat flux of sand dune surface covered by artificial vegetation is lower than that of bare sand bune surface. Net radiation heat flux,sensible heat flux and latent heat flux are higher over sand dune surface covered by artificial vegetation than that of bare sand dund surface.In this paper, the physical mechanism, practical and theoretical significances of sand dune surface covered by artificial vegetation are discussed.