Authors: Mark F Lunt; Matthew Rigby; Anita L Ganesan; Alistair J Manning; Ronald G Prinn; Simon O'Doherty; Jens Mühle; Christina M Harth; Peter K Salameh; Tim Arnold; Ray F Weiss; Takuya Saito; Yoko Yokouchi; Paul B Krummel; L Paul Steele; Paul J Fraser; Shanlan Li; Sunyoung Park; Stefan Reimann; Martin K Vollmer; Chris Lunder; Ove Hermansen; Norbert Schmidbauer; Michela Maione; Jgor Arduini; Dickon Young; Peter G Simmonds Journal: Proc Natl Acad Sci U S A Date: 2015-04-27 Impact factor: 11.205