中文摘要：

为深入研究地表温度异质性机理，引入三维小气候模式ENVI-met开展三维植被场景的温度场模拟。以离散分布的山杨、侧柏和油松人工林场景为例，在实测的气象要素、土壤水分、植被结构、叶面积指数和组分温度等的基础上，进行了敏感性分析和试验验证。敏感性分析结果表明：土壤相对湿度对模拟土壤温度场最为敏感，太阳辐射比例因子对模拟植被温度场最为敏感。验证结果表明：ENVI-met能准确模拟三维植被温度场的分布规律，模拟值与实测值较为接近（最高R2≈0．9，最小RMSE≈0．6K）。

英文摘要：

To further understand the mechanism of land surface temperature heterogeneity, the ENVI-met model was introduced to conduct research on vegetation temperature field simulation. Based on the measurements of meteorological data, soil moisture, vegetation structure, leaf area index and component temperature, sensitivity analysis and validation of ENVI-met were conducted in an experimental area including discrete distributed aspen, cedar and pine plantations. Results of sensitivity analysis showed that humidity was the most sensitive parameter for soil temperature simulations, and solar radiation scale factor for leaf temperatures. Validation results indicate that ENVI-met can fairly simulate the three- dimensional temperature distribution of vegetated scenes （the maximum R2 was about 0.9, the least RMSE was about 0.6 K）.