*Ai-ti Chen1, Chuan-chou Shen1, Timothy B Byrne2, Yuji Sano3, Naoto Takahata3, Tsanyao Frank Yang4, Cheng-Hong Chen4, Tsung-Kwei Liu4, Kuan-Yu Chen5, Yunshuen Wang6
(1.High-Precision Mass Spectrometry and Environment Change Laboratory (HISPEC), Department of Geosciences, National Taiwan University, Taipei, Taiwan, R.O.C., 2.Center for Integrative Geosciences, University of Connecticut, Storrs, CT 06269-1045, United States, 3.Atmosphere and Ocean Research Institute, The University of Tokyo, Kashiwanoha, Kashiwa, Chiba 277-8564, Japan, 4.Department of Geosciences, National Taiwan University, Taipei, Taiwan, R.O.C., 5.Industrial Technology Research Institute, Taipei, Taiwan, R.O.C., 6.Central Geological Survey, MOEA, Taipei, Taiwan, R.O.C.)