1. Institute of Global Environmental Change Xi'an Jiaotong University Xi'an China
2. Climate Geochemistry Department Max Planck Institute for Chemistry Mainz Germany
3. Key Laboratory of Karst Dynamics, MNR & Guangxi, Institute of Karst Geology Chinese Academy of Geological Sciences Guilin China
4. Department of Environment and Geography Bishop's University Sherbrooke Québec Canada
5. Instituto de Geociências Universidade de São Paulo São Paulo Brazil
6. State Key Lab of Loess and Quaternary Geology, Institute of Earth Environment Chinese Academy of Sciences Xi'an China
7. Department of Earth Sciences University of Minnesota, Twin Cities Minneapolis USA