Fig. 2From: Gap models across micro- to mega-scales of time and space: examples of Tansley’s ecosystem conceptSchematic of light transmission through forest canopy and tree crown in gap model-based forest VOCs emissions model—UVAFME-VOC. Kdt, Kt, and Kb represent the extinction coefficient for diffuse, total beam, and beam, respectively. Qsc and Qabs denote the scattered and absorbed beam radiation, respectively. Reproduced from Wang et al. (2017a)Back to article page