Rapid increase in atmospheric iodine levels in the North Atlantic since the mid-20th century.
Rapid increase in atmospheric iodine levels in the North Atlantic since the mid-20th century.
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DOI：
10.1038/s41467-018-03756-1
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发表时间：
2018-04-13
影响因子：
16.6
通讯作者：
Saiz-Lopez A
中科院分区：
文献类型：
--
作者：
Cuevas CA;Maffezzoli N;Corella JP;Spolaor A;Vallelonga P;Kjær HA;Simonsen M;Winstrup M;Vinther B;Horvat C;Fernandez RP;Kinnison D;Lamarque JF;Barbante C;Saiz-Lopez A
大气中的碘会导致对流层臭氧消耗和气溶胶形成，这两者都会对气候产生重大影响，并且是人类必需的饮食元素。然而，大气碘水平在十年和百年尺度上的演变尚不清楚。在这里，我们报告了 RECAP 冰芯（格陵兰东部沿海）的碘浓度，以调查过去 260 年（1750-2011 年）北大西洋大气碘水平的演变情况，这是北半球大气碘的最长记录。从 1950 年到 2010 年，碘含量增加了两倍。我们的研究结果表明，这种增加是由人为臭氧污染以及与最近北极海冰变薄相关的冰下浮游植物产量增加所驱动的。大气中碘的增加加速了臭氧的损失，并大大增强了北半球大陆的碘运输和沉积。未来的气候和人为强迫可能会继续增加海洋碘排放，从而在全球范围内对健康和环境产生潜在的重大影响。尽管其化学重要性，但大气中碘浓度随时间的变化尚不清楚。在这里，作者表明，自 1950 年以来，北大西洋大气中的碘水平增加了两倍，并提出臭氧污染和生物生产增强是北极海冰变薄的主要驱动因素。
Atmospheric iodine causes tropospheric ozone depletion and aerosol formation, both of which have significant climate impacts, and is an essential dietary element for humans. However, the evolution of atmospheric iodine levels at decadal and centennial scales is unknown. Here, we report iodine concentrations in the RECAP ice-core (coastal East Greenland) to investigate how atmospheric iodine levels in the North Atlantic have evolved over the past 260 years (1750–2011), this being the longest record of atmospheric iodine in the Northern Hemisphere. The levels of iodine tripled from 1950 to 2010. Our results suggest that this increase is driven by anthropogenic ozone pollution and enhanced sub-ice phytoplankton production associated with the recent thinning of Arctic sea ice. Increasing atmospheric iodine has accelerated ozone loss and has considerably enhanced iodine transport and deposition to the Northern Hemisphere continents. Future climate and anthropogenic forcing may continue to amplify oceanic iodine emissions with potentially significant health and environmental impacts at global scale. Despite its chemical importance, the evolution of atmospheric iodine concentrations over time is unknown. Here, the authors show that North Atlantic atmospheric iodine levels have tripled since 1950, and propose ozone pollution and enhanced biological production Arctic sea ice thinning as a primary driver.
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影响因子：
13.6
作者：
Horvat C;Jones DR;Iams S;Schroeder D;Flocco D;Feltham D
通讯作者：
Feltham D
影响因子：
3.9
作者：
Cooper, O. R.;Parrish, D. D.;Zbinden, R. M.
通讯作者：
Zbinden, R. M.
影响因子：
6.3
作者：
Fernandez, Rafael P.;Kinnison, Douglas E.;Saiz-Lopez, Alfonso
通讯作者：
Saiz-Lopez, Alfonso
影响因子：
6.3
作者：
Prados-Roman, C.;Cuevas, C. A.;Saiz-Lopez, A.
通讯作者：
Saiz-Lopez, A.
影响因子：
5.2
作者：
Martino, Manuela;Mills, Graham P.;Liss, Peter S.
通讯作者：
Liss, Peter S.