CO2 levels reach record high
Tue 13 May 2008
View all news
New figures, published by the US National Oceanic and Atmospheric Administration indicate that the concentration of CO2 in the atmosphere has reached record levels. Data compiled at the Mauna Loa observatory in Hawaii shows that CO2 levels in the atmosphere have reached 387 parts per million (ppm), a rise of 40% since the industrial revolution and the highest seen in 650,000 years.
Based on an 11,000 ft high volcano, the Mauna Loa observatory is regarded as producing amongst the most reliable data as its remote location ensures that its sensors are not confused with other possible sources of the gas.
According to the report, the annual mean growth rate of CO2 concentration for 2007 was 2.14ppm - the fourth year in the last six to see an annual rise greater than 2ppm. From 1970 to 2000, the concentration rose by about 1.5ppm each year, but since 2000 the annual rise has surged to an average 2.1ppm.
Researchers suggest the trend could mean that the Earth's ability to absorb billions of tonnes of extra CO2 each year is declining.
Related Links
< Back to news list