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首页> 外文期刊>Atmospheric chemistry and physics >Oceanic influence on atmospheric mercury at coastal and inland sites: A springtime noreaster in New England
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Oceanic influence on atmospheric mercury at coastal and inland sites: A springtime noreaster in New England

机译：海洋对沿海和内陆地区大气汞的影响：新英格兰的春季noreaster

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Continuous measurements of elemental (Hg~0) and reactive mercury were conducted at two sites in New Hampshire during a powerful April 2007 noreaster. During the most intense period of the storm, enhancements of ～30-50 ppqv in Hg~0 were observed at a coastal and a high elevation inland site. This enhancement occurred simultaneously with elevated mixing ratios of three marine tracers, CH_3I, CH_2Br _2 and CHBr_3. These observations suggest a marine source of Hg~0, possibly outgassing from the ocean surface during strong turbulence. The Hg~0 enhancement observed 100 km inland suggests that the impact of coastal storms on terrestrial Hg cycling may not be limited to near-shore environments. Combining Hg~0 and marine tracer measurements during the storm with estimates of oceanic tracer fluxes during previous strong storms yields an order-of-magnitude estimate of the oceanic source of Hg ~0 during the storm (～7 ppqv h~(−1)) which can account for the observed enhancement at the field sites.
机译：2007年4月，在新罕布什尔州的两个地点进行了一次有力的Noreaster测试，对元素（Hg〜0）和活性汞进行了连续测量。在风暴最强烈的时期，在沿海和高海拔内陆地区观测到Hg〜0的〜30-50 ppqv增强。这种增强与三种海洋示踪剂CH_3I，CH_2Br _2和CHBr_3的混合比升高同时发生。这些观察结果表明，Hg〜0的海洋来源，可能在强烈湍流时从海面逸出。在内陆100 km处观测到的Hg〜0增强表明沿海风暴对陆地Hg循环的影响可能不仅限于近岸环境。将风暴期间的Hg〜0和海洋示踪剂测量值与先前强风暴中的海洋示踪剂通量估计值相结合，可得出风暴期间Hg〜0的海洋来源的量级估计值（〜7 ppqv h〜（-1） ），可以说明在现场发现的增强效果。

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