A new source of volatile organoiodine compounds in surface seawater
A new source of volatile organoiodine compounds in surface seawater
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DOI：
10.1029/2008gl036334
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发表时间：
2009-01-14
影响因子：
5.2
通讯作者：
Liss, Peter S.
中科院分区：
文献类型：
--
作者：
Martino, Manuela;Mills, Graham P.;Liss, Peter S.
挥发性有机碘化合物（VOIs）是碘从海洋进入大气的主要载体。我们已经确定了一种新的，短寿命的VOI CH 2 I2，CHClI 2和CHI 3在一系列的实验室实验的海面源。这些化合物是在北海冬季收集的海水暴露于环境臭氧水平时形成的。VOI是由海洋溶解的有机物与次碘酸/分子碘反应产生的，次碘酸/分子碘是臭氧与溶解的碘化物反应在海面上形成的。当我们在热带大西洋巡航期间用分子碘培养不同生产力水平的海水时，形成了相同的三个VOI。我们认为，溶解的碘化物，溶解的有机物和臭氧的存在下，可以导致的CH 2 I2，CHClI 2和CHI 3的海面生产。因此，这一过程可以为海洋大气提供无处不在的碘源。引文：Martino，M.，G. P.米尔斯，J. Woeltjen和P. S.利斯（2009年），表层海水中挥发性有机碘化合物的新来源，地球物理学。保留信函：36，L01609，doi：10.1029/2008GL036334。
Volatile organoiodine compounds (VOIs) are the main carrier of iodine from the oceans to the atmosphere. We have identified a novel, sea-surface source of the short-lived VOIs CH2I2, CHClI2 and CHI3 in a series of laboratory experiments. These compounds were formed when seawater, collected during winter in the North Sea, was exposed to ambient levels of ozone. The VOIs are produced from the reaction of marine dissolved organic matter with hypoiodous acid/molecular iodine, which are formed at the sea surface when ozone reacts with dissolved iodide. The same three VOIs were formed when we incubated seawater of different productivity levels with molecular iodine during a cruise in the tropical Atlantic Ocean. We suggest that the presence of dissolved iodide, dissolved organic matter and ozone can lead to the sea-surface production of CH2I2, CHClI2 and CHI3. As such, this process could provide a ubiquitous source of iodine to the marine atmosphere. Citation: Martino, M., G. P. Mills, J. Woeltjen, and P. S. Liss (2009), A new source of volatile organoiodine compounds in surface seawater, Geophys. Res. Lett., 36, L01609, doi:10.1029/2008GL036334.