塔中人工绿地与自然沙面辐射平衡对比研究

Comparison and Research of the Land Surface Radiation Balance in the Artificial Vegetation and Nature Desert in the Taklimakan Desert

使用2014年5—9月塔克拉玛干沙漠腹地塔中大气环境观测实验站地表辐射观测资料,分析了塔中人工绿地与自然沙面在各种典型天气条件下的辐射分量特征差异。结果表明:人工绿地与自然沙面辐射平衡各分量最小值均出现在夜间,最大值出现在中午前后,总辐射和反射辐射日最大值出现在12:00;大气长波辐射日变化振幅较小,地面长波辐射日变化呈现不对称分布。晴天,人工绿地与自然沙面总辐射和净辐射变化幅度较小,自然沙面总辐射高于人工绿地;阴天,地面长波辐射略有减小,绿地大气长波辐射略有增加,总辐射和反射辐射减少,净辐射的变化受总辐射的影响,但减弱幅度小于总辐射;沙尘暴天气下,沙尘对辐射各分量影响明显,辐射各分量日变化不规则,人工绿地与自然沙面总辐射被明显削弱,日变化波动大。

In this paper, the characteristics of the land surface radiation balance under differentweather conditions in the artificial vegetation and nature desert are analyzed based on theobservation data obtained from the Taklimakan Desert hinterland between May 2014 and September2014. The results showed that the land surface radiation balance components of artificial vegetationand nature desert in Tazhong are in different time. The minimum value is in nighttime, themaximum value of global radiation and reflect radiation appeared at 1200 am. The diurnalfluctuation of atmosphere long -wave radiation had some difference, and the ground long -waveradiation is asymmetric distributed. When the day is fine, the variations of global radiation and netradiation in artificial vegetation and nature desert have some difference, and the global radiation inartificial vegetation is smaller than in nature desert. In cloudy day, the ground long-wave radiationwas slightly decreased, when the atmospheric long-wave radiation is slightly increased in artificialvegetation, The global radiation and reflect radiation is decreased. The variation pattern of netradiation was consistent with the global radiation, and the decrease range of net radiation is lessthan the global radiation. In sandstorm, the diurnal variation of land surface radiation balancecomponents are irregular, and they are obviously weakened both in artificial vegetation and naturedesert.