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首页> 外文期刊>Marine Chemistry >Tracing typhoon effects on particulate transport in a submarine canyon using polycyclic aromatic hydrocarbons
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Tracing typhoon effects on particulate transport in a submarine canyon using polycyclic aromatic hydrocarbons

机译：使用多环芳烃追踪台风对海底峡谷中颗粒物运输的影响

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摘要

The particles collected in a sediment trap in the Gaoping Submarine Canyon provided a high resolution PAH profile that traces typhoon (Kalmaegi) induced particle movement. Results provide further evidence that submarine canyons are an effective conduit for transporting terrestrial contaminants such as PAHs, particularly as typhoon-related hyperpycnal plumes at river mouths and ensuing turbidity currents in the submarine canyon. Observations here show that two typhoon-triggered turbidity currents passed the sediment trap. The beginnings of the two turbidity currents showed strong pyrogenic signatures suggesting coal and biomass burning sources. These turbidity currents carried enormous amounts of particulate PAHs (510 kg in 12.5 h), which accounted for 42% of the annual PAH flux from the Caoping River. The PAH signature allowed the typhoon effect to be broken into five stages: (Ⅰ) period before the typhoon effect (marine sources), (Ⅱ) typhoon induced currents (resuspended sediments), (Ⅲ) down-canyon flow (pyrogenic particles from northwestern shelf), (Ⅳ) river plume impact with two turbidity currents (arrival of terrestrial particles), and (Ⅴ) end of typhoon discharge of anthropogenic PAHs to the canyon head.
机译：在高坪海底峡谷的一个沉积物捕集器中收集的颗粒提供了高分辨率的PAH剖面，该剖面追踪了台风（Kalmaegi）引起的颗粒运动。结果提供了进一步的证据，表明海底峡谷是运输诸如PAHs等陆地污染物的有效管道，特别是在河口处与台风有关的高辉羽状流，并在海底峡谷中产生浊流。这里的观测结果表明，有两个台风触发的浊流通过了沉积物陷阱。两种浊流的开始都显示出强烈的热原特征，表明煤和生物质燃烧源。这些浑浊流携带大量的颗粒PAH（在12.5小时内为510千克），占曹平河年PAH通量的42％。多环芳烃的特征使台风效应可分为五个阶段：（Ⅰ）台风效应之前的时期（海洋源），（Ⅱ）台风感应流（重悬的沉积物），（Ⅲ）向下峡谷流动（来自西北部的热原颗粒）陆架），（Ⅳ）具有两种浊流的河羽撞击（陆上颗粒物到达），（Ⅴ）人为多环芳烃向台风喷头的台风末期。

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  • 来源
    《Marine Chemistry》 |2013年第20期|1-11|共11页
  • 作者

    Bing-Sian Lin; Peter Brimblecombe; Chon-Lin Lee; James T. Liu;

  • 作者单位

    Department of Marine Environment and Engineering. National Sun Yat-sen University, 80424 Kaohsiung Taiwan, ROC;

    School of Environmental Sciences, University of East Anglia, Norwich NR4 7TJ. United Kingdom;

    Department of Marine Environment and Engineering, National Sun Yat-sen University, No. 70, Lien-hai Rd., 80424 Kaohsiung, Taiwan, ROC Kuroshio Research Croup, Asia-pacific Ocean Research Center, National Sun Yat-sen University, 80424 Kaohsiung, Taiwan, ROC Center for Emerging Contaminants Research, National Sun Yat-sen University. 80424 Kaohsiung, Taiwan, ROC;

    Institute of Marine Geology and Chemistry, National Sun Yat-sen University, 80424 Kaohsiung, Taiwan, ROC;

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  • 正文语种 eng
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  • 关键词

    Gaoping river and estuary (Taiwan); Suspended particles; Sediment trap; Petrogenic/pyrogenic signatures; Hyperpycnal turbidity current; Riverine transport; Flood;

    机译：高坪河口（台湾）;悬浮颗粒;泥沙收集器;石油成因/热成因特征;高比浊浊流;沿河运输;洪水;

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