New EucFACE paper

The EucFACE experiment, running since Sept 2012, has fumigated a mature eucalyptus woodland in western Sydney. In a paper published today in Nature Climate Change, we show that despite a significant and sustained increase in leaf-level photosynthesis, there has been no detectable increase in above-ground productivity. On average, light-saturated rates of photosynthesis increased by 19%, whereas the 95% CI for the elevated CO2 effect on total above-ground production was (-25%, +9%). It seems likely that low soil P availability restricted the plants’ growth response. Read more about it:

ABC News: Carbon emissions are not soaked up by trees as well as initially thought, say scientists

New Scientist: Global greening may soak up less carbon dioxide than projected

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