1. School of Earth and Atmospheric Sciences Georgia Institute of Technology Atlanta GA USA
2. Now at Georgia Department of Natural Resources Environmental Protection Division Atlanta GA USA
3. Now at Microsoft Corporation Redmond WA USA
4. State Key Laboratory of Organic Geochemistry Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou China
5. CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation Yantai Institute of Coastal Zone Research Chinese Academy of Sciences Yantai China