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Increase in carbon dioxide emissions accelerating

e past, which would increase the rate of climate change caused by emissions."

The latest findings on greenhouse gas emissions are supported by measurements of the subsequent concentrations of carbon dioxide in the atmosphere.

Dr Paul Fraser, also from CSIRO Marine and Atmospheric Research, says that atmospheric concentrations of carbon dioxide grew by two parts per million in 2005, the fourth year in a row of above-average growth. "To have four years in a row of above-average carbon dioxide growth is unprecedented," Dr Fraser says.

Dr Fraser says the 30-year record of air collected at the Australian Bureau of Meteorology's observation station in Cape Grim, showed growth rates of just over one part per million in the early 1980s, but in recent years carbon dioxide has increased at almost twice this rate. "The trend over recent years suggests the growth rate is accelerating, signifying that fossil fuels are having an impact on greenhouse gas concentrations in a way we haven't seen in the past."

Drs Raupach and Fraser presented their latest findings last week during the Annual Science Meeting at Tasmania's Cape Grim Baseline Air Pollution Station, which is managed by the Australian Bureau of Meteorology to monitor and study global atmospheric composition in a program led by CSIRO and the Bureau.
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Source:CSIRO Australia


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