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首页> 外文期刊>Environmental Science & Technology >Dimethylmercury In Coastal Upwelling Waters, Monterey Bay, California
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Dimethylmercury In Coastal Upwelling Waters, Monterey Bay, California

机译：加利福尼亚州蒙特里湾沿海上升水域中的二甲基汞

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摘要

Depth profiles of dimethylmercury (DMHg) concentration were determined at nearshore to offshore sites in Monterey Bay, California. The onset of spring upwelling in the bay was accompanied by increases in DMHg concentrations. Profiles show DMHg increasing gradually with depth in fall and winter from <0.03 pM at the surface to 0.5 pM at 200 m. During the spring, DMHg concentrations increased between 30 and 100 m, first within Monterey Bay, then offshore. This change was accompanied by an increase in DMHg concentrations in the surface water DMHg between fall/winter (<0.03 pM) and spring (0.06-0.29 pM). Microbial activity associated with the remineralization of sinking organic matter produced by the high primary production in the bay may result in the relatively high DMHg in subsurface water in the bay, which when upwelled may facilitate the incorporation of organomercury into biota. As a result, productive coastal upwelling areas may represent an important source of methylated mercury to surface waters, and thus be an important source of mercury to marine ecosystems.
机译：在加利福尼亚州蒙特利湾，从近岸到近海站点确定了二甲基汞（DMHg）浓度的深度分布图。海湾春季涌流的开始伴随着DMHg浓度的增加。剖面显示，DMHg随着秋冬季节的深度而逐渐增加，从表面的<0.03 pM到200 m的0.5 pM。在春季，DMHg浓度增加了30至100 m，首先是在蒙特雷湾内，然后是近海。这种变化伴随着秋冬季（<0.03 pM）和春季（0.06-0.29 pM）之间地表水中DMHg浓度的增加。与海湾中较高的初级产量所产生的沉没有机物再矿化有关的微生物活性可能导致海湾中地下水中的DMHg相对较高，当上升时，这可能有助于有机汞掺入生物区系。结果，沿海生产性上升流地区可能是地表水甲基化汞的重要来源，因此是海洋生态系统中汞的重要来源。

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