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首页> 外文期刊>Global Biogeochemical Cycles >Nitrogen species in rainwater and aerosols of the Yellow and East China seas: Effects of the East Asian monsoon and anthropogenic emissions and relevance for the NW Pacific Ocean
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Nitrogen species in rainwater and aerosols of the Yellow and East China seas: Effects of the East Asian monsoon and anthropogenic emissions and relevance for the NW Pacific Ocean

机译：黄海和东海雨水和气溶胶中的氮物种：东亚季风和人为排放的影响以及与西北太平洋的相关性

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摘要

Rainwater and aerosol samples were collected from a coastal urban area (Qingdao) and remote islands (Qianliyan and Shengsi) and along cruise tracks in the Yellow Sea and East China Sea from 1997 to 2005. The samples were analyzed for nitrogen species (NO _3 ~-, NO _2 ~-, NH _4 ~+, and organic nitrogen) and other important elements. The nitrogen species concentrations showed considerable temporal and spatial variations for wet as well as dry atmospheric depositions. In addition, there was a dramatic reduction in the influence of anthropogenic emissions on nitrogen species with increasing distance from coastal urban stations to remote areas across the Yellow Sea and East China Sea. The monsoon climate of East Asia also had prominent effects on the atmospheric composition of nitrogen, with higher loadings in northerly (i.e., winter) than southerly (i.e., summer) monsoon periods, owing to strong emissions from the East Asian landmass. Dust storms in spring dramatically reduced the periodically high concentrations of atmospheric pollutants (e.g., nitrogen species) across the NW Pacific Ocean, but this was accompanied by a twofold-to-fourfold increase in the temporal deposition flux, which showed broad spatial dimensions. Finally, our study identified a strong gradient of wet as well as dry nitrogen deposition fluxes from East Asia to the interior of the North Pacific Ocean. The gradient reflected changes in emission sources and chemical reactions (e.g., forming secondary aerosols), rainfall and scavenging, and change in air mass trajectory.
机译：从1997年至2005年，从沿海市区（青岛）和偏远岛屿（千里岩和Sheng泗）以及沿黄海和东海游轮的沿途收集雨水和气溶胶样品。分析了样品中的氮种类（NO _3〜 -，NO _2〜-，NH _4〜+和有机氮）等重要元素。氮的浓度在潮湿和干燥的大气沉积物中都表现出相当大的时间和空间变化。此外，随着从沿海城市站到黄海和东海的边远地区距离的增加，人为排放物对氮物种的影响显着降低。东亚季风气候对氮的大气成分也有显着影响，由于东亚陆地的强烈排放，北季风（即冬季）的风量高于南季风（即夏季）。春季的沙尘暴极大地减少了西北太平洋的周期性高浓度大气污染物（例如氮物种），但这伴随着瞬时沉积通量增加了2到4倍，这表明了广阔的空间范围。最后，我们的研究确定了从东亚到北太平洋内部的湿氮和干氮沉积通量的梯度很大。梯度反映了排放源和化学反应（例如形成二次气溶胶），降雨和清除以及空气质量轨迹变化的变化。

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