Hello all

I'm wondering of the silhouette area of needles (shoots) might differ between winter and summer owing to differences in the clumping driven by changes of needle orientation, especially when the shoot is "frozen" i.e. in winter.

This is something that must have been observed if it is true, as it influences albedo computations. I'm thinking of Pinus spp.

Can anyone remember studies on this topic? I'm observing a 'winter anomaly' in backscattering signals that might be explained by this phenomenon.

ilkka