石河子垦区沙漠和绿洲下垫面生态条件下能量交换特征

 在古尔班通古特沙漠南部流动沙区及其以南100 km的滴灌棉田为绿洲下垫面的生态条件下,分析研究了能量输送的不同模式和日变化进程。在沙漠生态条件下, 大部分净辐射用于感热通量的散失,另一部分用于向地下传输,少部分则用于潜热输送;与沙漠相比,在滴灌棉田生态条件下的绿洲能量输送的基本模式为: 农田蒸散的潜热能量占绝大部分,少部分用于感热通量和土壤热通量的消耗,另一个与沙漠不同的特征是绿洲存在地表能量平衡差额。

Energy Exchange Characteristics over underlying Desert-Oasis Surface in Shihezi Desert Reclamation Area

We studied the energy transporting patterns and the daily variation process in both desert and oasis ecological conditions: the sand-moving area in south of the Gurbantunggut Desert and the drip-irrigation cotton field 100 km southward away from the desert.In desert ecological condition,the output of net radiation includes most latent heat flux,another part transmitted into the underground,and little part of sensible heat flux;in drip-irrigation cotton field,the output of net radiation includes most sensible heat of evapotranspiration,little part of consumption of latent heat flux and soil heat flux.Compared with desert ecological condition,another different character is that there is surface energy balance difference in oasis condition.