John C Lin¹, Lucy Hutyra², Logan Mitchell³, Christopher Loughner⁴, Ariel F Stein⁵, Katharine Lusk⁶, Conor Gately⁷, Steven C Wofsy⁸, Derek V. Mallia⁹, Ronald C Cohen¹⁰, Kenneth J Davis¹¹, Riley M Duren¹², Charles E Miller¹³, Anna Karion¹⁴, Ralph F Keeling¹⁵, Jooil Kim¹⁶, Natasha Miles¹⁷, Abhinav Guha¹⁸, Sally Newman¹⁹, Andrew L Rice²⁰, Scott Richardson²¹, Maryann R Sargent²², Jocelyn C Turnbull²³, Kristal R Verhulst²⁴ and Ray F Weiss¹⁵, (1)University of Utah, Atmospheric Sciences, Salt Lake City, UT, United States, (2)Boston University, Earth and Environment, Boston, MA, United States, (3)University of Utah, Salt Lake City, United States, (4)University of Maryland College Park, Earth System Science Interdisciplinary Center, College Park, MD, United States, (5)NOAA Air Resources Laboratory, College Park, MD, United States, (6)Boston University, Boston, MA, United States, (7)Boston University, Earth & Environment, Boston, United States, (8)Harvard University, School of Engineering and Applied Sciences, Cambridge, MA, United States, (9)Bruxelles, Belgium, (10)UC Berkeley, Berkeley, CA, United States, (11)The Pennsylvania State University, Department of Meteorology and Atmospheric Science, University Park, PA, United States, (12)Jet Propulsion Laboratory, Pasadena, CA, United States, (13)Jet Propulsion Lab, Pasadena, CA, United States, (14)National Institute of Standards and Technology Gaithersburg, Gaithersburg, MD, United States, (15)Univ California San Diego, La Jolla, CA, United States, (16)Scripps Institution of Oceanography, La Jolla, CA, United States, (17)Pennsylvania State University Main Campus, University Park, PA, United States, (18)Bay Area Air Quality Management District, San Francisco, CA, United States, (19)Caltech, Pasadena, CA, United States, (20)Portland State University, Portland, OR, United States, (21)Pennsylvania State University, State College, PA, United States, (22)Harvard University, Cambridge, MA, United States, (23)GNS Science, Lower Hutt, New Zealand, (24)UC Irvine, Irvine, CA, United States