record concentration of greenhouse gases in the atmosphere in 2020

October 25, 2021 11:19 am

At the current rate of increase in greenhouse gas concentrations, by the end of this century we will see a temperature rise far above the Paris Agreement targets of 1.5 to 2 degrees Celsius above pre-industrial levels. “

“The Greenhouse Gas Bulletin – adds Taalas – contains a clear scientific message for climate change negotiators at COP26. At the current rate of increase in greenhouse gas concentrations, by the end of this century we will see a vast increase in temperature. above the Paris Agreement targets by 1.5 to 2 degrees Celsius above pre-industrial levels “.

The amount of Co2 in the atmosphere passed the 400 parts per million milestone in 2015, recalls the OM secretary general, noting that “just five years later, it exceeded 413 ppm. This is more than just a chemical formula and numbers. on a graph. It has major negative repercussions for our daily life and well-being, for the state of our planet and for the future of our children and grandchildren, “he added.

“Carbon dioxide remains in the atmosphere for centuries and in the ocean even longer – explained Taalas – The last time the Earth experienced a similar concentration of CO2 was 3-5 million years ago, when the the temperature was 2-3 degrees Celsius warmer and the sea level was 10-20 meters higher than it is now. Back then there were no 7.8 billion people, “said prof. Taalas. “Many countries – he continued – are now setting carbon neutral targets and it is hoped that COP26 will see a substantial increase in commitments. We must transform our commitment into actions that will have an impact on the gases that cause climate change. We must review our systems. industrial, energy and transport and the whole lifestyle. The necessary changes are economically accessible and technically possible. There is no time to waste “, said finally Taalas.

Fear of Co2 absorption from land and oceans – The World Meteorological Organization is also concerned about the ability of terrestrial ecosystems (such as forests) and oceans to act as carbon dioxide “sinks”: there is concern that this ability may become less effective in the future due to for example of severe drought and forest fires, reducing the buffer function against a further increase in temperature.


record concentration greenhouse gases atmosphere

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