Historical carbonyl sulfide observations support long-term growth in atmospheric CO2 seasonal amplitude
Timothy W Hilton, University of California Merced, Merced, CA, United States, J Elliott Campbell, University of California Merced, Merced, United States, Marko Laine, Finnish Meteorological Institute, Helsinki, Finland, Yuting Wang, University of Bremen, Institute of Environmental Physics, Bremen, Germany, Joseph A Berry, Carnegie Institution for Science, Department of Global Ecology, Stanford, United States and James W Hannigan, National Center for Atmospheric Research, Boulder, CO, United States