Climate Change Protests

Like many Londoners I have been inconvenienced by the climate change protestors. I am sure that they do not care much and would hold that wasting a few hours of my time or causing me to walk a few extra miles is nothing compared to the threat to humanity and to all who live on the earth that climate change will bring. Continue reading

Higher and Higher

The latest measurement of atmospheric carbon dioxide from Mona Loa has been released. In May 2015 levels reached 403.94 parts per million compared with 401.78 parts per million in May 2014.

Happy Christmas from Mauna Loa

The latest measurements for atmospheric carbon dioxide from Mauna Loa show in November 2014 a measurement of 397.13 parts per million compared with 395.11 ppm in November 2013. Continue reading

It Will be Our Fault

There are a number of ways of measuring atmospheric carbon dioxide. I have thought the most useful measurements come from Mona Loa in Hawaii, which regularly (recently) has been recording measurements in excess of 400 parts per million but the World Meteorological Organisation measures the average concentration across the world, and although its figures are not 100% accurate they are scientifically robust and reliable. Their measurements show 396 parts per million but what is more significant is that they show that atmospheric concentration of carbon dioxide is growing at its fastest rate since 1984, notwithstanding all the treaties, measures, carbon credits, fine words and all the other means humanity has adopted in what has so far proved to be a futile attempt to halt or even limit the increase of atmospheric carbon dioxide. Continue reading

Atmospheric Carbon Dioxide Concentrations

The Mauna Loa readings of atmospheric carbon dioxide for July 2014 (monthly mid month mean) were 399 parts per million, which was a rise of 1.8 parts per million compared with July 2013. The measuring site is 3400 metres above sea level, and concentrations are marginally higher there than at sea level. the monthly mean for marine sea level sites for July 2014 was 397.82.   Continue reading

Carbon Dioxide in the Atmosphere Now Exceeds 400ppm

In May 2014 the atmospheric concentration of carbon dioxide measured at Mauna Loa was  401.85 ppm compared with 399.76 ppm a year earlier. In May 1960 the concentration was about 310 ppm and there has been a steady rise in concentration since then.  The mean annual growth rate is about 2.5 ppm and we can look forward to continued and growth levels of carbon dioxide which are higher than has ever been experienced by human beings in the form of homo sapiens.

There is nothing magic about the concentration exceeding 400 ppm. Some reputable scientists believe that even at 1000 ppm the climate will not change, but those are in a minority. One thing is certain; the atmosphere does not absorb all the anthropogenic carbon dioxide emissions; the sea absorbs some of them too, resulting in the acidification of the oceans.  Dissolving CO2 in seawater increases the hydrogen ion concentration in the ocean, and thus decreases ocean pH. This is elementary science, and while we may be fearful of increased atmospheric carbon dioxide we should be equally fearful of increased dissolved carbon dioxide in sea water.

The Tipping Point and Recent Global Warming

The monthly average measured atmospheric carbon dioxide at Mauna Loa for January 2014 is 397.8 parts per million compared with 395.54 parts per million in January 2013. According to the Earth Systems Research Laboratory at Mona Loa the monthly average measured atmospheric carbon dioxide globally averaged over marine surface sites in December 2013 was 397.21 parts per million. Continue reading