1. a Theoretical Physics Division, Petersburg Nuclear Physics Institute, Saint Petersburg, Russia
2. b USDA–China Ministry of Science and Technology Joint Research Center for Agroecology and Sustainability, University of California, Riverside, Riverside, California
3. c Faculty of Environmental Sciences and Natural Resource Management, Norwegian University of Life Sciences, Ås, Norway
4. d Centro de Ciência do Sistema Terrestre, Instituto Nacional de Pesquisas Espaciais, São José dos Campos, Brazil
5. e Princeton Institute of Life Sciences, Princeton, New Jersey
6. f Institut für Theoretische Physik, Technische Universität Dresden, Dresden, Germany