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Response to in2herbs (Reply #4)

Wed Apr 8, 2020, 05:45 PM

5. Also, the Keeling Curve (seasonality) . . .

What Dave Keeling discovered back in the late 1950s is that the Earth "breathes" in and out seasonally.

CO2 rises and falls in synch with the vegetation cycle in the Northern Hemisphere, where the overwhelming majority of land (and plants) are. We're approaching the peak for 2020, likely mid-May, with the annual low coming in October.

Apologies if you're already familiar with this!

https://www.climate.gov/news-features/videos/keeling-curve-carbon-dioxide-levels-becomes-chemical-landmark

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