Global atmospheric methane: budget, changes and dangers Dlugokencky, E. J. ; Nisbet, E. G. ; Fisher, R. ; Lowry, D. Abstract Publication: Philosophical Transactions of the Royal Society of London Series A Pub Date: May 2011 DOI: 10.1098/rsta.2010.0341 Bibcode: 2011RSPTA.369.2058D