Blue reflectance provides a surrogate for latewood density of high-latitude pine tree rings
McCarroll, D.; Pettigrew, E.; Luckman, A.; Guibal, F.; Edouard, J.L.
Arctic, Antarctic, and Alpine Research 34(4): 450-453
In conifers growing at high latitudes and altitudes, the maximum density of tree rings is closely related to climate but is difficult and very expensive to measure. Here, we compare maximum density with reflectance results obtained from Pinus sylvestris trees from northern Finland. Red, green, and blue reflectance spectra were obtained using a flatbed scanner and ultraviolet and infrared by scanning monochrome photographs at those wavelengths.