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Study finds changes in the Arctic sea ice cover may be driving changes in atmospheric chemistry

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Bromine also can remove ozone from the lowest layer of the atmosphere, the troposphere. Despite ozone’s beneficial role blocking harmful radiation in the stratosphere, ground-level ozone is a harmful pollutant. Bromine then reacts with a gaseous form of mercury, turning it into a pollutant that falls to Earth’s surface.

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ICCT finds growth in shipping in Arctic could increase pollutant emissions 150-600% by 2025 with current fuels

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MARPOL Annex VI sets limits on NO x and SO x emissions from ship exhaust, and prohibits deliberate emissions of ozone-depleting substances. Neither ECA extends west of Kodiak, Alaska, and neither includes the Aleutian Islands or areas north into the Arctic. Earlier post.). Findings and recommendations.

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Study: 87% of world’s population in 2013 lived in areas exceeding WHO PM2.5 guidelines

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Additionally, the study found that the population-weighted mean concentrations of ozone increased globally by 8.9% An additional 217,000 deaths were attributable to long-term ozone exposure. and ozone (O 3 ). and ozone (O 3 ). However, decreases in population-weighted mean concentrations of PM 2.5

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