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首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >Validation of land surface models using satellite-derived surface temperature
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Validation of land surface models using satellite-derived surface temperature

机译：使用卫星衍生的地表温度验证陆地表面模型

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This research examines the feasibility of using remotely sensed surface temperature for validation and updating of land surface hydrologic models. Surface temperature simulated by the Variable Infiltration Capacity (VIC) hydrologic model is compared over the Arkansas-Red River basin with surface temperature retrievals from TOVS and GOES. The results show that modeled and satellite-derived surface temperatures agree well when aggregated in space or time. In particular, monthly mean temperatures agree on the pixel scale, and basin mean temperatures agree instantaneously. At the pixel scale, however, surface temperatures from both satellites were found to have higher spatial and temporal variabilities than the modeled temperatures, although the model and satellites display similar patterns of variability through space and time. The largest differences between modeled and remotely sensed surface temperature variability occur at times of maximum net radiation both diurnally and seasonally, i.e., afternoon and summer. Comparison of temporal and spatial patterns of VIC-predicted surface temperature variability with similar predictions by nine other models involved in the PILPS-2c experiment show that the VIC patterns are similar to those of the other models. Observed surface temperature and air temperature from FIFE are used to identify possible errors in satellite-retrieved surface temperatures. The FIFE comparisons show that satellite retrieved surface temperatures likely contain errors that increase variability. [References: 21]
机译：这项研究检验了使用遥感地表温度验证和更新陆地表面水文模型的可行性。通过TOVS和GOES的地表温度反演，比较了可变渗透能力（VIC）水文模型模拟的地表温度。结果表明，在空间或时间上进行汇总时，模型化的和卫星衍生的表面温度吻合良好。特别是，月平均温度在像素尺度上一致，而盆地平均温度在瞬间一致。然而，在像素尺度上，虽然模型和卫星显示出类似的时空变化模式，但发现两颗卫星的地表温度都具有比模拟温度更高的空间和时间变化。建模和遥感表面温度变化之间的最大差异出现在昼夜和季节（即下午和夏季）的最大净辐射时。通过PILPS-2c实验涉及的其他9个模型，将VIC预测的表面温度变异性的时空模式与相似的预测进行了比较，结果表明，VIC模式与其他模型相似。从FIFE观察到的表面温度和空气温度用于确定卫星获取的表面温度中可能存在的误差。 FIFE比较显示，卫星检索到的地表温度可能包含会增加可变性的误差。 [参考：21]

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