Global annual methane emission rate derived from its current atmospheric mixing ratio and estimated lifetime
نویسندگان
چکیده
منابع مشابه
Atmospheric methane and global change
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 methane levels recorded in ice cores. Since the 1700s, rapidly growing human activities, particularly in the areas of agriculture, fossil fuel use, and waste disposal, have more than doubled methane emissions. Atmospheri...
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The trend and interannual variability of methane sources are derived from multi-annual simulations of tropospheric photochemistry using a 3-D global chemistrytransport model. Our semi-inverse analysis uses the fifteen years (1979–1993) re-analysis of ECMWF meteorological data and annually varying emissions including photochemistry, in conjunction with observed CH4 concentration distributions an...
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A factor of 2.5 increase in the global abundance of atmospheric methane (CH(4)) since 1750 contributes 0.5 Wm(-2) to total direct radiative forcing by long-lived greenhouse gases (2.77 Wm(-2) in 2009), while its role in atmospheric chemistry adds another approximately 0.2 Wm(-2) of indirect forcing. Since CH(4) has a relatively short lifetime and it is very close to a steady state, reductions i...
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ژورنال
عنوان ژورنال: Annales Geophysicae
سال: 2014
ISSN: 1432-0576
DOI: 10.5194/angeo-32-277-2014