The 2019 Refinement emission estimation: CH_4 emission in Asia during last decades

摘要

Methane emission (CH_4), the second most important ofgreenhouse gas (GHG) from carbon dioxide, contributesabout 15-20% of anthropogenic GHG emission. CH_4concentration is determined from the balancing betweensources even biogenic, thermogenic, or pyrogenic sourcesand sinks as hydroxyl radical oxidation. CH_4 concentrationtrend is rather fluctuate, high increased since thepre-industrial period till the year 1970, drop down of thegrowth rate until stabilize during the year 1999 to 2006, andthen increasing again since the year 2007 onward. Theambiguity of CH_4 concentration trend is challenging thescientist to study about CH4 emission.