Methane biomass burning emission

Carbon monoxide (CO) strongly influences the concentration of the radical OH in the tropical atmosphere. CO oxidation can lead to either production or destruction of ozone, depending on the NOx mixing ratio. Tropical soils are either a sink or a weak source of CO, where photochemical oxidation of methane and other hydrocarbons and biomass burning emissions are the predominant CO sources. 

Bogner and Spokas, 1993) and from biomass burning (e.g., see Hao and Ward, 1993). It should be noted that the emissions in some cases, for example rice fields and landfills, represent the net flux of emission and micro-bially mediated oxidation processes so that both need to be understood in assessing the methane budget (e.g., Reeburgh et al., 1993 Bogner and Spokas, 1993). 

The contribution of savannah fires exceeds 40% of the global level of biomass burning as a result of which the atmosphere receives minor gas components, such as non-methane hydrocarbons, carbon monoxide, methane, etc., as well as aerosols. According to available estimates for the period 1975-1980, 40%-70% of savannahs were burnt every year, about 6% of such fires took place in Africa. In 1990 about 2 1091 of vegetable biomass were burnt, and as a result 145TgCO got into the atmosphere, which constituted about 30% of anthropogenic CO emissions. 

Cement production Other industrial processes Human respiration Animal respiration Methane emissions equivalents Natural gas consumption Oil consumption Coal consumption Biomass burning... 

The oxidizing power of the atmosphere has likely decreased significantly, especially in the Northern Hemisphere, as a result of human activities. As a result, the lifetime of methane may have increased by 10-15% since the preindustrial era. At the same time, the abundance of tropospheric ozone has increased perhaps by as much as a factor of 2-3 in the Northern Hemisphere. Enhanced biomass burning fluxes of NO CO, and hydrocarbons from tropical ecosystems are likely to be important. Future changes in tropospheric ozone are predicted to be largest in the tropics (India, China). These projected increases in tropical emissions are likely to have a... 

Seidl, W. and G. Hanel (1983) Surface-active substances on rainwater and atmospheric particles. Pure and Applied Geophysics 121, 1077-1093 Seiler, W., and P. X Crutzen (1980) Estimates of gross and net fluxes of carbon between the biosphere and the atmosphere from biomass burning. Climatic Change 2, 207-247 Seiler, W., R. Conrad and D. Scharffe (1984) Eield studies of methane emission from termite nests into the atmosphere and measurements of methane uptake by tropical soils. Journal of Atmospheric Chemistry 1, 171-186... 

Scientists agree that energy production, energy distribution, and livestock contribute most to methane emissions, followed by landfill emissions and biomass burning. Thus, even though the concentration of methane in our atmosphere is far less than that of carbon dioxide, its role in global warming cannot be totally discounted, because methane is an efficient absorber of IR radiation. However, the major focus is on carbon dioxide due to the enormous quantities of this gas released into the atmosphere by our carbon-based economy. 

Schbnwiese (1995) calculates the CH share in the greenhouse effect of about 2.5% and agriculture is believed to account for roughly two-thirds of the total human-generated CH (Watson ef al. 1996). While paddy rice fields, cattle feedlots and the burning of biomass contribute to methane emissions, about 75% of methane on farms is emitted directly from ruminant animals, from digestive processes and excretion (Stolze ef al. 2000, Alfbldi ef al. 2002, Shepherd ef al. 2003). 

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