PowerPoint Presentation

CO2 Transport in the Atmosphere

§The lowest layer of the model

qFrom the very first step of simulation to the end of the first year

qOnly source from fossil fuel emission

qNo sink

CO2 concentration

N-S gradient

From the talk of Dr. Fung

Mixing over Equator

~ 2 weeks

Mixing within a hemisphere

~3 months

Mixing between hemispheres

~ order of 1 year


	Now, you can see how the CO2 from the surface is advected and diffused in the lowest layer of atmosphere. At the first time, there was no concentration of CO2. You can see the mixing is occurred within the Northern hemisphere which has major source regions. There seems to be a barrier over the tropics which interrupt the mixing between the hemispheres.