1. State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Beijing Normal University, Beijing 100875, China.
2. Center for Energy and Environmental Sciences (IVEM), Energy and Sustainability Research Institute Groningen (ESRIG), University of Groningen, Groningen, 9747 AG, Netherlands.
3. Department of Environmental Studies, Masaryk University, Brno, Czech Republic.
4. Department of Geographical Sciences, University of Maryland, College Park, MD 20740, USA.
5. International Institute for Applied Systems Analysis, Schlossplatz 1 - A-2361 Laxenburg, Austria.
6. Laboratory for Climate and Ocean-Atmosphere Studies, Department of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing 100871, China.