Nicola J Blake¹, Donald Ray Blake¹, Simone Meinardi¹, Barbara Barletta¹, Isobel J Simpson¹, Stacey Hughes¹, Nicholas Vizenor¹, Christopher Woods¹, Brenna Biggs¹, Alex Jarnot¹, Louisa K Emmons², Eric C Apel², Rebecca S Hornbrook², Stephen A Montzka³, Eric A Ray⁴, J Elliott Campbell⁵, Jack E Dibb⁶, Roisin Commane⁷ and Stephen Wofsy⁸, (1)University of California Irvine, Irvine, CA, United States, (2)National Center for Atmospheric Research, Boulder, CO, United States, (3)NOAA/ESRL Global Monitoring Division, Boulder, CO, United States, (4)NOAA/CIRES, Boulder, United States, (5)University of California Merced, Merced, CA, United States, (6)Univ New Hampshire, Durham, NH, United States, (7)Columbia University, Lamont-Doherty Earth Observatory, Palisades, NY, United States, (8)Harvard University, Cambridge, MA, United States