用CUPID模型模拟小麦组分温度分布:敏感性分析与验证

Using CUPID to Simulate Wheat Canopy Component Temperatures Distribution:Sensitivity Analysis and Evaluation

组分温度分布是决定农作物冠层热红外辐射方向特性的重要因素之一,为了分析小气候参数对冠层组分温度的影响,并分析其不确定性,对一个典型的土壤-植被-大气传输(SVAT)模型CUPID进行了组分温度模拟的敏感性和不确定性分析,并用实测温度分布信息进行了验证。详细描述了模拟和验证过程,结果表明:土壤组分温度不确定性较大,冠层组分温度不确定性较小(约2%),气温和土壤湿度对总体不确定性贡献最大;模拟组分温度与实测温度分布趋势一致。

The sensitivity analysis and validation of a SVAT （Soil-vegetation-atmosphere transfer） model （CUPID） are carried out to identify the parameters of CUPID with the largest influence on canopy component average temperatures and temperature profiles. The simulation process and field experimental designs are presented in detail. The results show that the overall uncertainty of the soil temperatures is unstable during growing season, while the uncertainty of canopy temperature stays at about 2% ; air temperature and soil water content are the two biggest error-contributors. It is found by evaluation that the trend between simulated and measured temperatures is consistent.