对流边界层夹卷通量参数化的室内模拟研究

Laboratory Tank Simulation on Parameterization of Entrainment Heat Flux in Convective Boundary Layer

大气对流边界层室内模拟是大气边界层研究的一种常用手段。利用室内对流水槽(150cm×150cm×60cm)模拟了大气对流边界层,以实验获取的平均温度廓线数据和光斑图像为基础对夹卷通量进行了参数化研究。通过分析由光斑图像得到的折射率结构常数廓线获取边界层的结构,然后通过平均温度廓线计算下垫面和混合层顶的热通量。从而计算夹卷通量参数化结果,并以此对理想模型下的边界层发展进行了计算,其结果与水槽模拟的情况较一致。

Laboratory tank simulation is a useful method for atmospheric boundary layer study.The convective boundary layer development in laboratory simulation tank(150 cm×150 cm×60 cm) is simulated to study the parameterization of entrainment heat flux.Based on the averaged-temperature profiles and beam pattern recorded in experiments,we obtained the height structure of boundary layer from refraction index structure parameter profile of beam pattern,surface and entrainment heat fiux from averaged-temperature profile...