Researchers report quantitative aircraft-based measurements of inorganic iodine in the stratosphere as 0.77 parts per trillion by volume; the finding suggests that iodine may be as important as chlorine for ozone loss in the lower stratosphere and that additional human-induced iodine emissions may increase particle formation and will likely continue to affect stratospheric ozone, according to the authors.
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Article #19-16828: "Quantitative detection of iodine in the stratosphere," by Theodore K. Koenig et al.
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Proceedings of the National Academy of Sciences