1 Institute of Earth Sciences, Academia Sinica, 128, Sec. 2, Academia Road, Nangang, Taipei, 11529, Taiwan. liuyiwei@earth.sinica.edu.tw.
2 Institute of the Environment and Sustainability, University of California-Los Angeles, La Kretz Hall, 619 Charles E. Young Dr. E #300, Los Angeles, CA, 90024, USA. robeagle@g.ucla.edu.
3 Atmospheric and Oceanic Sciences Department, University of California-Los Angeles, Math Sciences Building, 520 Portola Plaza, Los Angeles, CA, 90095, USA. robeagle@g.ucla.edu.
4 Department of Geology and Geophysics, University of Wyoming, 1000 East University Avenue, Laramie, WY, 82071-2000, USA.
5 Atmospheric and Oceanic Sciences Department, University of California-Los Angeles, Math Sciences Building, 520 Portola Plaza, Los Angeles, CA, 90095, USA.
6 Department of Marine and Environmental Sciences, Marine Science Center, Northeastern University, 430 Nahant Road, Nahant, MA, 01908, USA.