Here is the most compelling evidence for global warming due to man activities. CO2 concentrations have been derived from air bubbles trapped in ice of Antarctica.
By drilling and collection of core from this ice we are able to determine CO2 concentrations of past Earth atmospheres. These cores are dated back 800,000 years therefore these CO2 concentrations represent CO2 in the atmosphere of the Earth for the last 800,000 years.
When you compare CO2 of the last 200 years (since the industrial age last 200 years), CO2 in the atmosphere has been rising at an alarming rate. The latest average maximum concentration is 400 ppm measured in May 2013.
This version of the data plotted here reveals ice ages where CO2 reached low values of about 185 ppm in the atmosphere. The grey areas are periods between ice ages where natural cycles caused the Earth to warm, never reaching more than 300 ppm CO2 in the last 800,000 years. The natural range for the last 800,000 years has been 185 to 300 ppm CO2.
Now we have recorded 400 ppm as an average CO2 in the atmosphere. The current day grey area is much higher than the previous grey areas. This is an unprecedented event not recorded for the last 800,000 years and with the current rate of fossil fuel burning, concentrations are headed even higher in next decade, possibly doubling.
How can these sky-rocketing CO2 concentrations NOT have a disastrous effect on Earth’s climate in the coming decades. We are yet to see the effects of the current CO2 concentrations because the effects are delayed. The Earth atmosphere will not absorb these effects right away. We may not see these effects, but our children and grandchildren certainly will.
Maddalena Environmental Inc.