A Depressing Achievement

We are nearly there. The Mauna Loa readings of atmospheric carbon dioxide at an altitude of 3,400 metres in the Hawaiian northern subtropics recorded a mean average for May 2013 of 399.77 parts per million.   Continue reading

400 Parts Per Million and Rising

Those who measure the atmospheric carbon dioxide at Mauna Loa have recorded in March 2013 a monthly average concentration of 397.34 parts per million compared with  394.45 ppm which was recorded in March 2012.  The April figures are not yet our but in May the average concentration exceeded 400 ppm, which level of concentration the earth has not experienced for more than 5 million years. It is, in my view, certain that the atmospheric carbon dioxide concentration will average more than 400 ppm by the end of this year.

We are, as humans, moving into a new place.


Carbon dixode in the atmosphere and its effects

Carbon dioxide has the greatest effect of all the greenhouse gases on climate change, simply because it is the most prevalent. Methane has a greater effect per volume, but there is simply so much carbon dioxide around that its effects overweighs all the other greenhouse gases combined.  That is why measurements of atmospheric carbon dioxide are probably the most significant indicator of the effect of human activity on climate change, because one way or another, humans cause the emissions of carbon dioxide more than any other climate effecting substance. Continue reading