Jooil Kim¹, Timothy J Lueker², Anna Karion³, Peter Salameh⁴, Vineet Yadav⁵, Madat Sardarli^4,6, Nick Rollins⁷, William Berelson⁸, Francesca Mia Hopkins⁹, Claudia I Czimczik¹⁰, Dr. Elizabeth DiGangi¹¹, Gabriel Salinas¹², Steve Prinzivalli¹², Charles Draper¹², Charles E Miller¹³, Ray F Weiss¹⁴ and Ralph F Keeling¹⁴, (1)Scripps Institution of Oceanography, La Jolla, CA, United States, (2)Scripps Institution of Oceanography, UCSD, La Jolla, CA, United States, (3)National Institute of Standards and Technology, Gaithersburg, United States, (4)Scripps Institution of Oceanography, La Jolla, United States, (5)Carnegie Institution For Scien, Stanford, United States, (6)University of California San Diego, La Jolla, CA, United States, (7)University of Southern California, Los Angeles, United States, (8)University of Southern California, Earth Sciences, Los Angeles, CA, United States, (9)University of California Riverside, Department of Environmental Sciences, Riverside, CA, United States, (10)University of California Irvine, Department of Earth System Science, Irvine, United States, (11)Earth Networks Inc., Research and Development, Germantown, United States, (12)Earth Networks Inc., Germantown, United States, (13)California Institute of Technology, Jet Propulsion Laboratory, Pasadena, United States, (14)Univ California San Diego, La Jolla, CA, United States