Restoration of the Ozone Layer Is Back on Track, Scientists Say – The New York Times

by | Jan 9, 2023 | Climate Change

In this way, the researchers said, the Chinese rogue production had contributed to the “banks” of chlorofluorocarbons that were produced worldwide before bans went into effect and are in foams as well as refrigeration equipment and fire-extinguishing systems. These existing chemicals are not yet in the atmosphere, but are being released slowly through foam deterioration and destruction, leaks or other means.Dr. Montzka said the size of the Chinese contribution to the banks was not known. “But if the banks have been built up substantially, that would add a few more years to that expected delay in recovery,” he said.Durwood Zaelke, president of the Institute for Governance & Sustainable Development, a Washington-based research and advocacy organization, said the elimination of the rogue emissions was another example of the success of the protocol, which is generally considered to be the most effective global environmental pact ever enacted.Atmospheric monitoring, which is required by the protocol, detected the problem, Mr. Zaelke said, and brought it to the attention of the treaty’s directorate. “Without admitting guilt, the offending parties got their act together,” he said. “And the measurements are back where they should be.”Under the protocol, assessments like the one issued Monday are required at least every four years. In addition to NOAA scientists, contributors included researchers with NASA, the World Meteorology Organization, …

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