CFC components have a life cycle in the atmosphere of up to 100 years. The results from the new analysis of NOAA atmospheric measurements explain why. In order to sum the effects of the individual greenhouse gases and other forcing agents in the atmosphere, the so-called 'greenhouse gas equivalent concentration' has been defined. So one free chlorine atom coming from a CFC molecule can cause a huge amount of damage and destroy ozone molecules for many years. Scientists had been … At lower levels in the atmosphere, ozone concentration above minimal amounts can cause health effects, affect plant growth, and cause air pollution and building damage. How high is the concentration of CFC's in the Atmosphere? 2014-11-22 03:07:31 2014-11-22 03:07:31. Wiki User Answered . 1 2 3. Asked by Wiki User. From 2014 to 2016, emissions of CFC-11 increased by 25 percent above the average measured from 2002 to 2012. Though concentrations of CFC-11 in the atmosphere are still declining, they’re declining more slowly than they would if there were no new sources, Montzka said. Annual change in atmospheric trichlorofluoromethane (CFC-11) concentrations, given as actual measured concentration change (solid line), and expected/projected rate of change based on reported emissions of parties to the Montreal Protocol (dashed line). Top Answer. In the upper atmosphere 10-20 miles (20-30 kilometers) above ground, ozone acts as a shield to prevent some harmful ultraviolet rays from the sun reaching the ground. Greenhouse gases differ in the way they affect the climate system. CFC emissions in developed nations have virtually stopped due to regulations, however the damage caused to the atmosphere by prior use will continue to allow ultraviolet rays to continue … This indicator shows the observed trends in greenhouse gas concentrations. Since 2012, concentrations have fallen at a lower rate than expected, suggesting unreported sources of CFC-11 emissions. Answer. This suggests new CFC sources have emerged in recent years, hampering the international effort to completely rid the atmosphere of these chemicals.

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