The conclusions of the Group III 4 ° IPCC report were presented to Bangkok May 4, 2007. You can download in the form of a summary in English .
The point of this report is the concentration of CO2 in the atmosphere, which is growing faster than expected.
In the 90s, the growth rate of CO2 averaged 1% per year. Between 2000 and 2005, it is 3%.
The increase in CO2 was provided by the models, it is due to increasing world population and accelerated industrial development of countries like India or China. By cons, what was not foreseen was that the plants and the oceans sequester less carbon dioxide than expected, so that the warming is being carried away.
That's what has just confirmed a study of the British Antarctic Survey . The "carbon sinks" trap half the CO2 produced by human activity. The Southern Ocean is involved in 15%. This study shows that the absorption of CO2 in the Southern Ocean is reaching saturation and that the acidity of the Southern Ocean may reach a crisis level before 2050, as previously thought present.
Professor Chris Rapley, Director of the British Antarctic Survey said: "Since the beginning of the industrial revolution, the world's oceans it absorbed about a quarter of the 500 gigatons of carbon emitted into the atmosphere not human activity. The possibility that global warming might affect the absorption of CO2 in the Southern Ocean (the most powerful "carbon sinks") is taken very seriously. "
For more information:
1. Climate Change 2007: Mitigation of Climate Change (IPCC WGIII -. pdf file)
2. 4th IPCC report - the findings of the Group II (Gaia)
3. CO2 emissions soar since 2000 (Le Figaro)
4. Polar ocean 'soaking up less CO2' (BBC news)
5. Climate change affects Southern Ocean carbon sink (British Antarctic Survey)
6. L’Océan Antarctique absorbe moins de CO2 que prévu (notre-planete.info)
Crédit illustration : IPCC