1. International Center for Climate and Global Change Research and School of Forestry and Wildlife Sciences; Auburn University; Auburn AL USA
2. Woods Hole Research Center; Falmouth MA USA
3. Research Center for Eco-Environmental Sciences, State Key Laboratory of Urban and Regional Ecology; Chinese Academy of Sciences; Beijing China
4. Laboratoire des Sciences du Climat et de l'Environnement; Gif sur Yvette France
5. Global Carbon Project; CSIRO Oceans and Atmosphere Research; Canberra Australian Capital Territory Australia
6. Now at Department of Natural Resources and Environmental Management; Ball State University; Muncie IN USA