File:HCFC and HFC atmospheric trends.png

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Summary

Description
English: These graphs show the observed atmospheric changes for several common man-made halocarbons. The abundance of each gas is shown in parts per trillion (ppt). Multiple samples of each gas are gathered from sites around the world in the NOAA/GML Flask Sampling Network (colored lines).

The gases shown are:
hydrochlorofluorocarbons (HCFCs): 22, 141b, and 142b
hydrofluorocarbons (HFCs): 32, 125, 134a, 143a, 152a, 227ea, and 365mfc
The manufacturing of the HCFCs is scheduled to be transitioned to HFCs within most major markets by year 2020.

Locations sampled include:
ALT - Alert, NWT, Canada
BRW - Point Barrow, Alaska
CGO - Cape Grim, Tasmania
KUM - Cape Kumukahi, Hawaii
MLO - Mauna Loa, Hawaii
NWR - Niwot Ridge, Colorado
SMO - American Samoa
THD - Trinidad Head, California
SPO - South Pole, Antarctica

Source Credit:
Stephen A. Montzka and James W. Elkins / Halocarbons and Other Atmospheric Trace Species Group / Global Monitoring Division / Earth Systems Research Laboratories / United States National Oceanic and Atmospheric Administration

https://www.esrl.noaa.gov/gmd/hats/
Date
Source https://www.esrl.noaa.gov/gmd/hats/about/hcfc.html
Author James W. Elkins and Stephen A. Montzka

Licensing

Public domain
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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Captions

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Observed atmospheric abundance of common HCFC and HFC gases

Items portrayed in this file

depicts

greenhouse gas

inception

1 June 2018

media type

image/png

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