Orientation of leaves in a mature hemiboreal mixed broadleaf stand (the Järvselja RAMI birch stand) was measured using the high-density point cloud of terrestrial laser scanner hits. Leaf normal distribution in the upper part of crowns of tall aspen and birch trees is almost spherical, and slightly planophile in the lower part of crowns. Leaves of alder trees are rather planophile in the upper part of crowns, and strongly planophile in the lower part of crowns. Lime and maple trees form the lower layer of trees in the stand. Their crowns are mainly in shade, and therefore, their leaf orientation is strongly planophile throughout the whole crown. Parameters of beta distribution and elliptical distribution are provided for the approximation of empirical distributions. The acquired information about leaf orientation can improve performance assessment of radiative transfer models.

中文翻译：

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使用陆地激光扫描仪在混合半实体阔叶林林中测量叶片方向

使用地面激光扫描仪命中的高密度点云测量了成熟的半实叶混合阔叶林（JärvseljaRAMI桦树林）中叶片的方向。在高大的白杨树和桦树树冠上部的叶正态分布几乎是球形的，在树冠下部略有亲嗜性。al木的叶子在树冠的上部相当嗜酸，而在树冠的下部则强烈嗜香。stand树和枫树形成了林下层的树木。它们的树冠主要在阴影下，因此，它们的叶子方向在整个树冠中都具有强烈的嗜平面性。提供β分布和椭圆形分布的参数以近似经验分布。