摘要
１９９５年８月在甘肃省河西黑河流域绿洲边缘内外进行了一次“干旱地区环境综合监测计划（简称ＡＥＣＭＰ９５）”的野外观测实验。由观测资料分析得出：在绿洲边缘内外，无论是近地面辐射收支特征，还是地表反射率或各辐射通量密度分量对净辐射通量密度的贡献都存在差异；入射辐射通量密度值比较接近；绿洲上的反射率小于戈壁上的，戈壁上反射率随太阳天顶角的变化主要是由近红外波段反射率随太阳天顶角的变化引起的；向上长波辐射通量密度白天戈壁上大，夜间绿洲上略大一些，而且戈壁上有明显的日变化过程；白天绿洲上有效辐射通量密度小于戈壁上的，夜间两者比较接近；白天近地面净辐射通量密度绿洲大于戈壁上的。
A field experiment of “Arid Environment Comprehensive Monitoring 95” was operated in August,1995.The experimental sites are located in near Oasis edge area in Hei River basin of Northwest Chain.The analytical results of the observational data show that the characteristics of radiation budget,surface albedo and contribution of radiation flux density components to net radiation flux density are different between inside and outside of the Oasis side.The discrepancy of downward radiation flux density between two sites is small.Albedo is bigger over Gobi site than that over Oasis site. Variation of albedo with solar zenith angle is mainly caused by near-infrared albedo.The upward long-wave radiation over Gobi is bigger than that over Oasis site during daytime.Net radiation flux density over Oasis is bigger than that over Gobi.The discrepancy of net radiation is mainly caused by albedo and thermal condition of the land surface.
出处
《高原气象》
CSCD
北大核心
1997年第4期359-366,共8页
Plateau Meteorology
基金
国家自然科学基金
