“Greening” and “browning” of the Earth’s land surface: is there evidence from FLUXNET observations?
Jingfeng Xiao, Earth Systems Research Center, University of New Hampshire, Durham, United States, Xufeng Wang, Earth Systems Research Center, University of New Hampshire, Durham, NH, United States; Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, China and Scott V Ollinger, University of New Hampshire, Natural Resources and the Environment, Durham, United States