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NASA-Supported Monitoring Network Assesses Ozone Layer Threats

24 May 2019

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On the heels of the first definitive signs of the ozone layer recovery last year, an international team of scientists discovered that production and emission of a banned, potent ozone-depleting chemical is on the rise again. A new research finding, published in Nature 23 on May, locates the source region for about half of those new emissions. Since 2013, they found that an increase of about 7000 tons per year of trichlorofluromethane, or CFC-11, added to the atmosphere originates from eastern China.

Locating and identifying this particular source of CFC-11 was possible in part because of a NASA-supported monitoring network for atmospheric gases that has been in place since 1978.

Source: NASA

Image credit: AGAGE - The Gosan GAW Regional Station (Global Atmosphere Watch, program of the World Meteorological Organization) is located on the south-western tip of Jeju Island (Republic of Korea), facing the East China Sea.