1. Department of Ecology and Evolutionary Biology; Princeton University; Princeton; New Jersey; USA
2. Institute for the Study of Earth, Oceans, and Space; University of New Hampshire; Durham; New Hampshire; USA
3. U.S. Geological Survey; Princeton; New Jersey; USA
4. Faculty of Forestry; University of Toronto; Toronto, Ontario; Canada
5. Geophysical Fluid Dynamics Laboratory; NOAA; Princeton; New Jersey; USA
6. Max-Planck-Institute for Biogeochemistry; Jena; Germany
7. Laboratoire de Météorologie Dynamique; Ecole Polytechnique, IPSL, CNRS; Palaiseau; France