WHY METHANE INCREASING IN THE ATMOSPHERE IS PUSHING US TOWARDS NEW ANALYTICAL APPROACHES FOR STABLE ISOTOPE RATIOS

James W C White1, Sylvia Englund Michel2, Bruce H Vaughn2, John B Miller3, Kenneth Alan Masarie4, Edward J Dlugokencky5, Owen Sherwood6 and Pieter P Tans7, (1)Institute of Arctic and Alpine Research, University of Colorado, Boulder, CO, United States, (2)University of Colorado, Institute of Arctic and Alpine Research, Boulder, CO, United States, (3)NOAA Boulder, ESRL, Boulder, United States, (4)NOAA, Boulder, CO, United States, (5)NOAA Boulder, Global Monitoring Laboratory, Boulder, United States, (6)University of Colorado at Boulder, Institute of Arctic and Alpine Research, Boulder, CO, United States, (7)NOAA, Global Monitoring Laboratory, Boulder, United States