We studied the effects of tree species and tree density on the capacity of a forest to buffer understory temperatures during the summer period. We dissociated tree-species and light effects by integrating incident solar irradiance and its proportion intercepted by the canopy into our analyses. We measured solar radiation and air temperature over three consecutive years (2018, 2019 and 2020) in 16 plots in Central France composed of mature stands of sessile oak and Scots pine with three types of composition: monospecific oak, monospecific pine and oak-pine mixture, and two levels of tree density. Air temperature and solar radiation were recorded simultaneously in the experimental plots and in a reference plot without forest cover.

中文翻译：

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森林的缓冲温度能力：树冠树种重要吗？

我们研究了树种和树木密度对森林在夏季缓冲林下温度的能力的影响。我们通过将入射太阳辐照度及其被树冠截获的比例整合到我们的分析中来分离树种和光效应。我们连续三年（2018 年、2019 年和 2020 年）在法国中部的 16 个样地测量了太阳辐射和气温，这些样地由成熟的无柄橡树和苏格兰松组成，有三种类型的组成：单种橡树、单种松树和橡树松混合，以及两个级别的树木密度。气温和太阳辐射同时记录在实验样地和没有森林覆盖的参考样地中。