posted on Feb, 20 2009 @ 07:05 PM
Hello everyone, I just thought of making a thread on the mechanism of CO2 in the atmosphere. The reason is that I have members saying in threads that
CO2 is just a small gas, minority gas and it cant do much harm
, but, it is quite the opposite all is due to the chemical nature of the gas,
which makes large quantities in the atmosphere dangerous
First, the chemical nature of CO2 has to be explained in detail. And this is based on absorption spectroscopy of the gas.
Now the nature of CO2 is.
Carbon dioxide is a greenhouse gas as it transmits visible light but absorbs strongly in the infrared and near-infrared
So, CO2 is transparent to incoming solar radiation, and opaque to outgoing infrared radiation
as it abosorbs it and retains it.
So, the question might come. Where does the infra red radiation come in the first place? Let alone retaining it.
Everyone knows that during the daytime, the incomind solar radiation heats the earth up and during night time, as the earth cools, the earth releases
the radiation in the form of infrared radiation. And this infrared radiation is then absorbed by the CO2 in the atmosphere thus heating it up.
So, equating both, you will see the link and see that CO2 can do much harm by heating the atmosphere.