Articles sur Carbon dioxide measurements

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The earth’s missing ‘fingerprint’ sits somewhere in the upper atmosphere, but for some reason eludes climatologists. Shutterstock

Explainer: the search for Earth’s ‘missing fingerprint’

Without understanding why the 'fingerprint' has failed to appear our predictions about global warming - as carbon dioxide concentrations increase - are uncertain.
For the first time, the February monthly average carbon dioxide levels at the Mauna Loa Observatory have passed 400ppm. NOAA/Wikimedia Commons

February carbon dioxide levels average 400ppm for first time

We have hit a new milestone in carbon dioxide levels: the average for February topped 400ppm. It's the first time this has happened in the northern winter, when levels are typically lower than in summer.

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