3 ms·
(Actual readings from Seattle, as an example) https://www.pmel.noaa.gov/co2/story/Space+Needle https://www.pmel.noaa.gov/co2/story/Space+Needle Older study htt
by chris_va 4y ago
(Actual readings from Seattle, as an example)
https://www.pmel.noaa.gov/co2/story/Space+Needle https://www.pmel.noaa.gov/co2/story/Space+Needle
Older study
https://www.sciencedirect.com/science/article/abs/pii/S135223100000412X https://www.sciencedirect.com/science/article/abs/pii/S13522...
... tldr a higher planetary boundary layer over cities can form under various weather conditions. That reduces mixing, and cities are large sources of CO2.
- kolinko 4y agoThanks for the links. It's still not 2x, but 25-75% under specific atmospheric conditions is more than I would've thought. So I can say - I stand corrected, and TIL :)
- chris_va 4y agoI think the 2x is an extreme. There are some articles (which I have not verified) talking about how Paris reached 900+ Anywhere that traps smog should show similar correlations with CO2.