Trichlorofluoromethane, also called freon-11, CFC-11, or R-11, is a chlorofluorocarbon (CFC). It is a colorless, faintly ethereal, and sweetish-smelling liquid that boils around room temperature. [5] CFC-11 is a Class 1 ozone-depleting substance which …

Five years after an unexpected spike in emissions of the banned ozone-depleting chemical chlorofluorocarbon CFC-11, emissions dropped sharply between 2018 and 2019, new analyses of global air measurements show.

Dec 2, 2021 · Trichloromethane, also known as CFC-11, made headlines in 2018 when scientists alerted us of an unexpected increase in global CFC-11 emissions. Unexpected, because CFC-11 has been banned since 2010, as it was one of the gases that …

Feb 10, 2021 · Emissions of ozone-depleting substances, including trichlorofluoromethane (CFC-11), have decreased since the mid-1980s in response to the Montreal Protocol 1, 2. In recent years, an unexpected...

Since 1977 five different sampling programs within The Halocarbons and other Atmospheric Trace Species (HATS) group have measured chlorofluorocarbon-11 (CFC-11). These programs include three flask systems and two in situ programs.

Feb 10, 2021 · An international research team, including scientists from MIT, have observed a global reduction of the banned ozone-depleting chemical CFC-11, after it spiked unexpectedly several years ago.

May 22, 2019 · Here, using high-frequency atmospheric observations from Gosan, South Korea, and Hateruma, Japan, together with global monitoring data and atmospheric chemical transport model simulations, we...

While observations at global background sites in east Asia suggested unexpectedly increased emissions of trichlorofluoromethane (CFC-11) after 2012 in eastern China, particularly in Shandong province, there is a lack of local monitoring data to constrain the emission estimates.

New research has identified two additional regions of Asia as contributing to rising emissions of the ozone-destroying chemical CFC-11 identified by NOAA scientists in 2018.

Jul 22, 2019 · Trichlorofluoromethane, also known as CFC-11 and Freon 11, is a refrigerant, aerosol propellant, and foam-blowing agent. It is unusual in that its boiling point is at normal ambient temperature and pressure, so it can be handled as a liquid or gas.