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Monday, July 28, 2008

Characteristics of some major climate changing gases






Greenhouse gas
Sources Sinks Importance for climate
Carbon Dioxide (CO2) 1) Burning of fossil fuel 2) Land-use change (deforestation) 1) Ocean Uptake 2) Plants!& photosynthesis Absorbs infrared radiation; affects stratospheric O3
Methane (CH4) 1) Biomass burning 2) Enteric fermentation 3)Rice paddies 1) Reactions with OH 2) Microorganisms uptake by soils Absorbs infrared radiation; affects tropospheric O3 and OH; affects stratospheric O3 and H2O; produces CO2
Nitrous Oxide (N2O) 1) Biomass burning 2) Fossil-fuel combustion 3) Fertilizers 1) Removal by soils 2) Stratospheric photolysis and reaction with O Absorbs infrared radiation; affects stratospheric O3
Ozone (O3) Photochemical reactions involving O2 Catalytic chemical reactions involving NOx, ClOx and HOx species. Absorbs ultraviolet and infrared radiation
Carbon Monoxide (CO) 1) Plant emissions 2) Man-made release (transport, industrial) 1) Soil uptake 2) Reactions with OH Affects stratospheric O3 and OH cycles; produces CO2
Chlorofluorocarbons (CFCs) Industrial production Insignificant in troposphere, dissociated in stratosphere (photolysis and reaction with O) Absorbs infrared radiation; affects stratospheric O3
Sulphur Dioxide (SO2) 1) Volcanoes 2) Coal and Biomass burning 1) Dry and wet deposition 2) Reactions with OH Forms aerosols, which scatter solar radiation
Posted by Admin at 8:28 AM
Edited on: Monday, April 26, 2010 10:13 PM
Categories: Climate Change, For Scientists and Engineers