Methane (CH4) is the most abundant organic trace gas in the atmosphere. In the distant
past, variations in natural sources of methane were responsible for trends in atmospheric …

Atmospheric CH4 is arguably the most interesting of the anthropogenically influenced, long-
lived greenhouse gases. It has a diverse suite of sources, each presenting its own …

Atmospheric methane grew very rapidly in 2014 (12.7±0.5 ppb/year), 2015 (10.1±0.7
ppb/year), 2016 (7.0±0.7 ppb/year), and 2017 (7.7±0.7 ppb/year), at rates not observed …

The atmospheric methane trend is not fully understood. Here we investigate the role of the
main sink, the main natural source, and anthropogenic emissions on the methane growth …

Methane is the second strongest anthropogenic greenhouse gas and its atmospheric
burden has more than doubled since 1850. Methane concentrations stabilized in the early …

We have constructed an atmospheric inversion framework based on TM5-4DVAR to jointly
assimilate measurements of methane and δ 13 C of methane in order to estimate source …

The geographic and seasonal emission distributions of the major sources and sinks of
atmospheric methane were compiled using methane flux measurements and energy and …

Atmospheric methane mixing ratios from 1000 AD to present are measured in three Antarctic
ice cores, two Greenland ice cores, the Antarctic firn layer, and archived air from Tasmania …

Estimates of the global magnitude of atmospheric methane sources are currently mainly
based on direct flux measurements in source regions. Their extrapolation to the entire globe …

Measurements of the 13C/12C, D/H and 14C composition of atmospheric methane (CH4)
between 1988 and 1995 are presented. The 13C/12C measurements represent the first …