The results of this work are projections of possible future histories of the concentration of atmospheric carbon dioxide, as well as a projection of the most likely trend of rising average global ...

Neither has anyone been able to explain the inconsistencies that I noted earlier between the CO2 concentration and temperature since 1910.

The calculated CO2 concentration added rises to 2,500ppm between 9ky and 10.5ky from the start of the PETM, (presumably there was ~280ppm, or more, prior to the emissions pulse).

NASA has released an extraordinary video that shows how the concentration of carbon dioxide (CO2) in the earth’s atmosphere changes over a year’s time. The video is gorgeous, but it's a lot ...

T he average level of carbon dioxide in the atmosphere across the globe passed 400 parts per million (ppm) last year, a symbolic and worrying milestone in growth of manmade climate change, the ...

However, the “hockeystick” graph showing a rapid increase in 20th century CO2 concentration is genuine. The Third Assessment Report (2001) of the UN-sponsored IPCC (Intergovernmental Panel on Climate ...

“The last time the Earth experienced a comparable concentration of [carbon dioxide] was 3-5 million years ago, when the temperature was 2-3°C warmer and sea level was 10-20 meters higher than now.

CO2 in the Atmosphere Climbs to Highest Level in 4.5 Million Years The last time the CO2 concentration was at this level, seas were almost 80 feet higher than today.