Boundary Layer Halogens in Coastal Antarctica
Boundary Layer Halogens in Coastal Antarctica
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DOI：
10.1126/science.1141408
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发表时间：
2007-07
期刊：
影响因子：
56.9
通讯作者：
A. Saiz‐Lopez;A. Mahajan;R. Salmon;S. Bauguitte;A. Jones;H. Roscoe;J. Plane
中科院分区：
文献类型：
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作者：
A. Saiz‐Lopez;A. Mahajan;R. Salmon;S. Bauguitte;A. Jones;H. Roscoe;J. Plane
卤素影响地球对流层的氧化能力，碘氧化物形成超细气溶胶，可能对气候产生影响。我们报告全年测量边界层氧化碘和氧化溴在近海岸的哈雷站，南极洲。令人惊讶的是，这两个物种都存在于整个阳光照射期间，并表现出相似的季节周期和浓度。春季氧化碘的峰值（万亿分之20）是大气中有记录以来的最高浓度。这些卤素水平会造成臭氧层的大量消耗，以及南极边界层中二甲基硫醚和汞的快速氧化。
Halogens influence the oxidizing capacity of Earth's troposphere, and iodine oxides form ultrafine aerosols, which may have an impact on climate. We report year-round measurements of boundary layer iodine oxide and bromine oxide at the near-coastal site of Halley Station, Antarctica. Surprisingly, both species are present throughout the sunlit period and exhibit similar seasonal cycles and concentrations. The springtime peak of iodine oxide (20 parts per trillion) is the highest concentration recorded anywhere in the atmosphere. These levels of halogens cause substantial ozone depletion, as well as the rapid oxidation of dimethyl sulfide and mercury in the Antarctic boundary layer.