基于闪烁仪的热通量反演及MOD16产品校验  

Scintillometer-based heat flux inversion and MOD16 product calibration

作　　者：刘聪[1] 岳恒 马昕[3] 龚威 LIU Cong;YUE Heng;MA Xin;GONG Wei(CMA Meteorological Observation Centre,Beijing 100086,China;Electronic Information School,Wuhan University,Wuhan 430072,China;State Key Laboratory of information Engineering in Surveying,Mapping and Remote Sensing,Wuhan University,Wuhan 430072,China;Luojia Laboratory,Electronic Information School,Wuhan University,Wuhan 430072,China)

机构地区：[1]中国气象局气象探测中心,北京100086 [2]武汉大学电子信息学院,湖北武汉430072 [3]武汉大学测绘遥感国家重点实验室,湖北武汉430072 [4]武汉大学电子信息学院,湖北珞珈实验室,湖北武汉430072

出　　处：《大气与环境光学学报》2024年第4期429-439,共11页Journal of Atmospheric and Environmental Optics

基　　金：国家自然科学基金(42171464,41971283,41801261,41827801,41801282)。

摘　　要：大孔径闪烁仪既能够用于区域地面热通量观测,也是测量卫星像元尺度地表热通量的有效工具,利用闪烁仪地表相对真值检验卫星产品的准确性对于卫星产品算法及观测方法改进至关重要。为初步解决卫星产品校验问题,选取河南鹤壁、内蒙古乌兰察布两处闪烁仪测量站,基于近地面层相似性理论,结合观测气象信息对闪烁仪输出的折射率结构常数进行处理,利用迭代算法计算出感热、潜热通量,并以鹤壁地区涡动相关仪的测量结果作为参考进行准确性验证。进一步在乌兰察布地区利用闪烁仪数据对MOD16A2遥感蒸散发产品中的潜热通量数据进行了地面校验。结果表明闪烁仪的反演结果准确度高,同涡动数据相关性高,且与卫星像元尺度匹配,可以用作卫星产品的地面校验。Large-aperture scintillometer can be used for regional surface heat flux observations and is also an effective tool for measuring surface heat fluxes at the satellite image scale.For the improvement of satellite product algorithms and observation methods,it is crucial to validate the accuracy of satellite products utilizing surface relative truth of scintillator.To preliminarily solve the problem of satellite product calibration,two scintillometer stations in Hebi,Henan Province,and Ulanqab,Inner Mongolia,China were selected.Based on the theory of near ground similarity and combined with the meteorological information observed,the refractive index structure constant output from the scintillometers was processed.Then the sensible and latent heat fluxes were calculated using an iterative algorithm,and the accuracy of scintillometers was verified taking the measurement results of the eddy correlation meter in Hebi area as reference.Additionally,the latent heat flux data in MOD16A2 remote sensing evapotranspiration products were ground-checked using scintillometer data from the Ulanqab region.The results demonstrate that the scintillometer inversion results have high accuracy,high correlation with the eddy data,and highly match the scale of the elements in satellite images,allowing for the use of these data as ground calibration of satellite products.

关 键 词：潜热通量 大孔径闪烁仪 涡动相关仪 地面校验 

分 类 号：P412.13[天文地球—大气科学及气象学]