Actually the effect of volcanoes is- wait for it- one of cooling. The increase in CO2 is more than offset by the increase in albedo due to ash blown into the upper atmosphere. Eruptions high in sulphurous gasses have an even larger aerosol effect due their absorption and re-emission of insolation. Originally Posted by DucbutterThat brings up an interesting point. All this talk of CO2 warming our Earth. Why is it then that the atmosphere on Mars is 96% CO2 and their ambient temperature according to NASA is on an average of -84 deg. With all that CO2 shouldn't Mars be much warmer? So does CO2 really warm a planet, or is it just some scientific jargon that we are supposed to believe in for the sake of something else?
Jim