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Which greenhouse gas is present in highest quantity in atmosphere?

Atmospheric methane

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Open access•Book Chapter•DOI Atmospheric Methane: Trends and Impacts Donald J. Wuebbles, Katharine Hayhoe - Show less +1 more 01 Jan 2000 27 Citations	On a per molecule basis, additional methane is much more effective as a greenhouse gas than additional CO2.
Journal Article•DOI European source strengths and Northern Hemisphere baseline concentrations of radiatively active trace gases at Mace Head, Ireland Richard G. Derwent, Peter Simmonds, Simon O'Doherty, Philippe Ciais, DB Ryall - Show less +4 more 01 Nov 1998-Atmospheric Environment 39 Citations	The elevated greenhouse gas concentrations found in “polluted” air masses provide clear evidence for the presence of substantial emission sources in Europe.
Open access•Journal Article•DOI Climate instability on tidally locked exoplanets Edwin S. Kite, Eric Gaidos, Michael Manga - Show less +2 more 21 Nov 2011-The Astrophysical Journal 94 Citations	Our results are most relevant for atmospheres that are thin, have low greenhouse-gas radiative efficiency, and have a principal greenhouse gas that is also the main constituent of the atmosphere.
Journal Article•DOI A review on emissions and mitigation strategies for road transport in Malaysia Hwai Chyuan Ong, Teuku Meurah Indra Mahlia, Teuku Meurah Indra Mahlia, Haji Hassan Masjuki - Show less +3 more 01 Oct 2011-Renewable & Sustainable Energy Reviews 139 Citations	Further results show that CO2 emission is the primary source of greenhouse gas pollution which is 71% of the total CO2 equivalent.
Journal Article•DOI Mechanistic studies on the formation of trifluoromethyl sulfur pentafluoride, SF5CF3--a greenhouse gas. William Carrier, Corey S. Jamieson, Ralf I. Kaiser - Show less +2 more 19 Feb 2007-Inorganic Chemistry 11 Citations	This formation mechanism suggests that a source for this potentially dangerous greenhouse gas might be the recombination of SF5(X2A1) and CF3(X2A1) radicals on aerosol particles in the terrestrial atmosphere.
Open access•Journal Article•DOI Atmospheric methane and global change Donald J. Wuebbles, Katharine Hayhoe - Show less +1 more 01 May 2002-Earth-Science Reviews 763 Citations	On a per molecule basis, it is much more effective a greenhouse gas than additional CO2.
Open access•Journal Article•DOI Coupled soil oxygen and greenhouse gas dynamics under variable hydrology K. M. Jarecke, Terrance D. Loecke, Amy J. Burgin - Show less +2 more 01 Apr 2016-Soil Biology & Biochemistry 36 Citations	Hot spots and hot moments of greenhouse gas (GHG) fluxes can contribute significantly to overall GHG budgets.

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