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针对遥感在面上计算的特点,将模式模拟的气象要素区域分布替代以往使用的单点观测值作为遥感估算蒸散发模型的初始场,引入到SEBS(Surface Energy Balance System)模型中,利用EOS/MODIS遥感资料对金塔绿洲非均匀下垫面地表能量通量进行了估算。对比估算结果与实测值表明,引入数值模拟结果后,绿洲地表感热通量的估算误差平均减小了5.8%,潜热通量的误差平均减小了5.5%,说明数值模拟结果的引入比较成功。通过分析地表通量的区域分布特征表明,数值模拟结果的引入在一定程度上更加细致地刻画了荒漠绿洲能量平衡的分布特征,在戈壁荒漠地区,潜热通量非常小,而绿洲集中的地区及水库附近出现了潜热通量的极大值。
Aiming at the characteristics of remote sensing on the surface, the distribution of meteorological elements in the pattern simulation is used instead of the single point observation used in the past as the initial field to estimate the evapotranspiration model by remote sensing. The model is introduced into SEBS (Surface Energy Balance System) MODIS remote sensing data were used to estimate the surface energy flux of the non-uniform underlying surface in Quinta Oasis. The comparison between the estimated results and the measured values shows that after the numerical simulation results are introduced, the estimated error of the surface heat flux in the oasis decreases by 5.8% on average, and the error of the latent heat flux decreases by 5.5% on average, which shows that the numerical simulation result is introduced successfully . By analyzing the regional distribution of surface fluxes, it is shown that the introduction of the numerical simulation results more precisely characterizes the distribution of energy balance in the desert oasis. The latent heat flux in the Gobi Desert is very small. However, There is a maximum of latent heat flux near the reservoir.