Jian-Xiong Sheng¹, Rachel Tunnicliffe², Ronald G Prinn¹, Anita Ganesan³, Matthew L Rigby³, Tia Scarpelli⁴, Lu Shen⁴, Shaojie Song⁴, Yuzhong Zhang⁴, Joannes D Maasakkers⁵, Greet Georgette Alice Janssens-Maenhout⁶, Hartmut Boesch⁷ and Robert Parker⁷, (1)Massachusetts Institute of Technology, Cambridge, MA, United States, (2)University of Bristol, School of Chemistry, Bristol, United Kingdom, (3)University of Bristol, Bristol, United Kingdom, (4)Harvard University, Cambridge, MA, United States, (5)SRON, Netherlands Institute for Space Research, Utrecht, Netherlands, (6)European Commission Joint Research Centre, Ispra Vey, Italy, (7)University of Leicester, Leicester, United Kingdom