Peter J Hernes¹, Chia-ying Chuang², Jennifer Harfmann¹, Francois Guillemette³, Robert G Spencer⁴, Brian A Bergamaschi⁵ and Karl Kaiser⁶, (1)University of California Davis, Davis, CA, United States, (2)Academia Sinica, Research Center for Environmental Changes, Nangang, Taipei, Taiwan, (3)University of Quebec-Trois Rivieres, Trois Rivieres, QC, Canada, (4)Florida State University, Earth, Ocean and Atmospheric Science, Tallahassee, FL, United States, (5)USGS-Calif State University, Sacramento, CA, United States, (6)Texas A&M University at Galveston, Galveston, United States