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首页> 外文期刊>Marine Chemistry >Black carbon in marine particulate organic carbon: Inputs and cycling of highly recalcitrant organic carbon in the Gulf of Maine
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Black carbon in marine particulate organic carbon: Inputs and cycling of highly recalcitrant organic carbon in the Gulf of Maine

机译：海洋颗粒有机碳中的黑碳：缅因湾高难顽有机碳的输入和循环

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摘要

To increase our understanding of the roles of black carbon (BC), a highly sorptive and recalcitrant material, we measured BC concentrations and fluxes in marine particulate organic carbon (POC) out of the water column in the Gulf of Maine (GoM), a representative coastal area downwind of important BC sources of the Northeastern United States. Concentrations ranged from < 0.1 to 16 μg/L in the spring and late summer, typically contributing between 1 and 20% of the POC. Water-column export fluxes were near 10g_(BC)/m~2·yr. These observations suggest that(a) up to 50% of the "molecularly uncharacterized" POC in this region's seawater is combustion-derived BC, and (b) the "bioavailabilities" of hydrophobic pollutants like polycyclic aromatic hydrocarbons (PAHs) would be influenced substantially by sorption to BC. The observed BC spatial distributions imply that a large part of the BC was carried offshore by wind and that much of it is accumulated in the coastal sediments. On a global scale, these results suggest the GoM and other coastal areas with similar BC loadings accumulate significant amounts of highly recalcitrant organic carbon that remineralizes on geological time scales in the world's oceans.
机译：为了加深对高吸附性和难分解性物质黑碳（BC）的作用的了解，我们测量了缅因州海湾（GoM）水柱中海洋颗粒有机碳（POC）中的BC浓度和通量。美国东北部重要卑诗省资源的代表性沿海地区顺风。在春季和夏季末，浓度范围<0.1至16μg/ L，通常占POC的1％至20％。水柱出口通量接近10g_（BC）/ m〜2·yr。这些观察结果表明，（a）该地区海水中多达50％的“分子特征性” POC是燃烧衍生的BC，（b）像多环芳烃（PAHs）这样的疏水性污染物的“生物利用度”将受到很大影响。通过吸附到BC。观测到的BC空间分布表明，BC的很大一部分是通过风运到海上的，并且其中很大一部分是在沿海沉积物中积累的。在全球范围内，这些结果表明，戈麦尔和其他具有类似生物承载量的沿海地区积累了大量的高顽固性有机碳，这些碳在世界海洋的地质时间尺度上都得以重新矿化。

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  • 来源
    《Marine Chemistry》 |2009年第4期|172-181|共10页
  • 作者

    D. Xanat Flores-Cervantes; Desiree L Plata; John K. MacFarlane; Christopher M. Reddy; Philip M. Gschwend;

  • 作者单位

    R.M. Parsons Laboratory. MIT 48-413, Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA;

    R.M. Parsons Laboratory. MIT 48-413, Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts, 02543. USA;

    R.M. Parsons Laboratory. MIT 48-413, Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA;

    Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts, 02543. USA;

    R.M. Parsons Laboratory. MIT 48-413, Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    black carbon; particulate organic carbon; seawater; gulf of maine; carbon cycle;

    机译：黑炭颗粒有机碳海水;缅因州海湾碳循环;

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