3 ms·
Would be interesting to find an explanation for the surge (and decline) in atmospheric Freon, and its replacement with other refrigerants.
by marshray 6y ago
Would be interesting to find an explanation for the surge (and decline) in atmospheric Freon, and its replacement with other refrigerants.
- InitialLastName 6y agoWould fluorocarbons be detectable in a remote spectrogram of the atmosphere at the levels they existed in the earth's atmosphere? Would the depletion of ozone in the atmosphere be more visible? From [0] it looks like CFC's peaked on the order of 1 ppb. Humans (perhaps) just detected phosphine at the level of ~20ppb in Venus's atmosphere through telescope spectral analysis [1], but that's on a very close planet that we've been staring at intently for 4000 years; presumably there are compounds present in smaller concentrations that we haven't seen yet. Is there a heuristic for the hypothetical minimum sensitivity relative to interstellar distances? [0] https://www.esrl.noaa.gov/gmd/hats/about/cfc.html https://www.esrl.noaa.gov/gmd/hats/about/cfc.html [1] https://www.nature.com/articles/s41550-020-1174-4 https://www.nature.com/articles/s41550-020-1174-4