File:HCFC142b concentration.jpg
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Summary
| Description |
English: Graph shows the concentration of 1,1-chloro-1-difluoroethane (HCFC-142b, R-142b, C2H3ClF2) in earth's atmosphere versus time and latitude. X-axis data interval is monthly. Y-axis concentration is parts per trillion. Atmospheric samples were gathered within evacuated flasks from 8-12 ground stations distributed over the northern (positive latitudes) and southern hemispheres, then sealed and transported to Boulder Colorado for analysis. Most emissions originate at northern latitudes, and are mixed through the troposphere of both hemispheres after about 1-2 years. Data sampling and analysis by: |
| Date | |
| Source | https://www.esrl.noaa.gov/gmd/hats/gases/HCFC142b.html |
| Author | NOAA |
Licensing
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This image is in the public domain because it contains materials that originally came from the U.S. National Oceanic and Atmospheric Administration, taken or made as part of an employee's official duties.
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 02:10, 9 February 2024 | | 809 × 374 (51 KB) | Bikesrcool | update February 2024, zonal |
| 04:26, 12 February 2021 |  | 811 × 376 (47 KB) | Bikesrcool | Uploaded a work by NOAA from https://www.esrl.noaa.gov/gmd/hats/gases/HCFC142b.html with UploadWizard |
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