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DOI	10.1073/pnas.1809867115
	Alpine ice evidence of a three-fold increase in atmospheric iodine deposition since 1950 in Europe due to increasing oceanic emissions
	Legrand M.; McConnell J.R.; Preunkert S.; Arienzo M.; Chellman N.; Gleason K.; Sherwen T.; Evans M.J.; Carpenter L.J.
发表日期	2018
ISSN	0027-8424
起始页码	12136
结束页码	12141
卷号	115 期号:48
英文摘要	Iodine is an important nutrient and a significant sink of tropospheric ozone, a climate-forcing gas and air pollutant. Ozone interacts with seawater iodide, leading to volatile inorganic iodine release that likely represents the largest source of atmospheric iodine. Increasing ozone concentrations since the preindustrial period imply that iodine chemistry and its associated ozone destruction is now substantially more active. However, the lack of historical observations of ozone and iodine means that such estimates rely primarily on model calculations. Here we use seasonally resolved records from an Alpine ice core to investigate 20th century changes in atmospheric iodine. After carefully considering possible postdepositional changes in the ice core record, we conclude that iodine deposition over the Alps increased by at least a factor of 3 from 1950 to the 1990s in the summer months, with smaller increases during the winter months. We reproduce these general trends using a chemical transport model and show that they are due to increased oceanic iodine emissions, coupled to a change in iodine speciation over Europe from enhanced nitrogen oxide emissions. The model underestimates the increase in iodine deposition by a factor of 2, however, which may be due to an underestimate in the 20th century ozone increase. Our results suggest that iodine’s impact on the Northern Hemisphere atmosphere accelerated over the 20th century and show a coupling between anthropogenic pollution and the availability of iodine as an essential nutrient to the terrestrial biosphere. © 2018 National Academy of Sciences. All Rights Reserved.
英文关键词	Alpine ice core; GEOS-Chem; Iodine; Trend; Tropospheric ozone
语种	英语
scopus关键词	iodine; nitrogen oxide; ozone; ice; iodine; sea water; Alpine ice; Article; atmospheric deposition; biosphere; concentration (parameters); Europe; geographic and geological phenomena; Northern Hemisphere; precipitation; priority journal; sea pollution; seasonal variation; simulation; summer; trend study; volatilization; winter; air pollutant; atmosphere; chemistry; climate; season; Air Pollutants; Atmosphere; Climate; Europe; Ice; Iodine; Ozone; Seasons; Seawater
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/160445
作者单位	Legrand, M., Institut des Géosciences de l’Environnement, Université Grenoble Alpes-CNRS, Saint-Martin d’Hères, 38400, France; McConnell, J.R., Division of Hydrologic Sciences, Desert Research Institute, Reno, NV 89512, United States; Preunkert, S., Institut des Géosciences de l’Environnement, Université Grenoble Alpes-CNRS, Saint-Martin d’Hères, 38400, France; Arienzo, M., Division of Hydrologic Sciences, Desert Research Institute, Reno, NV 89512, United States; Chellman, N., Division of Hydrologic Sciences, Desert Research Institute, Reno, NV 89512, United States; Gleason, K., Division of Hydrologic Sciences, Desert Research Institute, Reno, NV 89512, United States; Sherwen, T., Wolfson Atmospheric Chemistry Laboratories, Department of Chemistry, University of York, York, YO10 5DD, United Kingdom, National Centre for Atmospheric Science, University of York, York, YO10 5DD, United Kingdom; Evans, M.J., Wolfson Atmospheric Chemistry Laboratories, Department of Chemistry, University of York, York, YO10...
推荐引用方式 GB/T 7714	Legrand M.,McConnell J.R.,Preunkert S.,et al. Alpine ice evidence of a three-fold increase in atmospheric iodine deposition since 1950 in Europe due to increasing oceanic emissions[J],2018,115(48).
APA	Legrand M..,McConnell J.R..,Preunkert S..,Arienzo M..,Chellman N..,...&Carpenter L.J..(2018).Alpine ice evidence of a three-fold increase in atmospheric iodine deposition since 1950 in Europe due to increasing oceanic emissions.Proceedings of the National Academy of Sciences of the United States of America,115(48).
MLA	Legrand M.,et al."Alpine ice evidence of a three-fold increase in atmospheric iodine deposition since 1950 in Europe due to increasing oceanic emissions".Proceedings of the National Academy of Sciences of the United States of America 115.48(2018).