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5
CH3041
GCM MODELLING ?
Global Circulation Modelling input data:
• Emissions: CO2, CH4 & N2O (rice),O3, HCFC
• Physical data : GWP, solar radiation
• GIS information : land & sea surface
Problems: Fluxes often inaccurate eg. CO2
• Human population +
100 million per year
• Complex chemistry: eg. involving the OH.
radical which cleans up the pollutant gases
gives an ‘indirect effect’. Some molecules
break down to form greenhouse gases.
radical which cleans up the pollutant gases
gives an ‘indirect effect’. Some molecules
break down to form greenhouse gases.
• Feedback O3 in the stratosphere warms the stratosphere and \ cools the troposphere.
• aerosols, clouds,
sea circulation.
