Subtropical to boreal convergence of tree-leaf temperatures

@article{Helliker2008SubtropicalTB,
  title={Subtropical to boreal convergence of tree-leaf temperatures},
  author={B. Helliker and S. Richter},
  journal={Nature},
  year={2008},
  volume={454},
  pages={511-514}
}
The oxygen isotope ratio (δ18O) of cellulose is thought to provide a record of ambient temperature and relative humidity during periods of carbon assimilation. Here we introduce a method to resolve tree-canopy leaf temperature with the use of δ18O of cellulose in 39 tree species. We show a remarkably constant leaf temperature of 21.4 ± 2.2 °C across 50° of latitude, from subtropical to boreal biomes. This means that when carbon assimilation is maximal, the physiological and morphological… Expand
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TLDR
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