1. Key Laboratory of Geographic Information Science (Ministry of Education); East China Normal University; Shanghai China
2. School of Geographic Sciences; East China Normal University; Shanghai China
3. Department of Civil, Environmental, and Construction Engineering; University of Central Florida; Orlando Florida USA
4. Trinity College of Arts and Sciences; Duke University; Durham North Carolina USA
5. Natural Resource Ecology Laboratory; USDA UV-B Monitoring and Research Program; Fort Collins Colorado USA
6. Department of Ecosystem Science and Sustainability; Colorado State University; Fort Collins Colorado USA