1. High-Precision Mass Spectrometry and Environment Change Laboratory (HISPEC), Department of Geosciences, National Taiwan University, Taipei 10617, Taiwan, R.O.C.
2. Research Center for Future Earth, National Taiwan University, Taipei 10617, Taiwan, R.O.C.
3. Atmosphere and Ocean Research Institute, The University of Tokyo, Kashiwanoha, Kashiwa, Chiba 277-8564, Japan
4. Department of Geosciences, University of Connecticut, Storrs, Connecticut 06269-1045, United States
5. Department of Geosciences, National Taiwan University, Taipei 10617, Taiwan, R.O.C.
6. Central Geological Survey, MOEA, Taipei 23568, Taiwan, R.O.C.
7. Global Change Research Center, National Taiwan University, Taipei 10617, Taiwan, R.O.C.