【摘要】 中红外反射率对于植被具有重要的应用价值，然而由于中红外波段内地物的发射能量和太阳的反射能量耦合在一起，使得地物在中红外波段的反射率不易得到。建立了一种计算植被中红外反射率的模型，对其敏感性分析表明该模型可靠性较强。运用该模型计算出了多个研究站点的植被中红外反射率，得到的值与实际相符，且与NDVI呈一定的负相关关系。用该模型得到的中红外反射率代替红外反射率与近红外反射率建立了一个新的植被指数，结果表明该新植被指数能反映出植被的覆盖度且具有对气溶胶不敏感的优势。更多还原

【Abstract】 Mid-infrared reflectance has significant application value for vegetation. However, due to the coupling of the emitted energy from land objects and the reflected energy from the sun in the mid-infrared band, it is challenging to determine the reflectance of land objects in this band. This article presents a model for calculating mid-infrared reflectance in vegetation, and the sensitivity analysis demonstrates that the model exhibits strong reliability. This study employed this model to calculate the mid-infrared reflectance of vegetation at multiple research sites. The values obtained were consistent with reality and showed a certain negative correlation with NDVI. A new vegetation index was established using the near-infrared reflectance and mid-infrared reflectance obtained from this model, rather than the infrared reflectance. The results showed that this new vegetation index can represent vegetation coverage and has the advantage of being insensitive to aerosols.更多还原