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首页> 外文期刊>Environmental Science & Technology >Continuous Seasonal River Ebullition Measurements Linked to Sediment Methane Formation
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Continuous Seasonal River Ebullition Measurements Linked to Sediment Methane Formation

机译：与沉积物甲烷形成有关的连续季节性河水排放量测量

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摘要

Laboratory sediment Incubations and continuous ebullition monitoring over an annual cycle in the temperate Saar River, Germany confirm that impounded river zones can produce and emit methane at high rates (7 to 30 (g CH_4 m~(-3)d~(-1)) at 25 ℃ and 270 to 700 (g CH_4 m~(-2) yr~(-1)), respectively). Summer methane ebullition (ME) peaks were a factor of 4 to 10 times the winter minima, and sediment methane formation was dominated by the upper sediment (depths of 0.14 to 0.2 m). The key driver of the seasonal ME dynamics was temperature. An empirical model relating methane formation to temperature and sediment depth, derived from the laboratory incubations, reproduced the measured daily ebullition from winter to midsummer, although late summer and autumn simulated ME exceeded the observed ME. A possible explanation for mis was substrate limitation. We recommend measurement! of methanogenically available carbon sources to identify substrate limitation and help characterize variation in methane formation with depth and from site to site.
机译：在德国萨尔河温带实验室中的沉积物温育和一年周期的连续沸腾监测表明，蓄积的河区可以高速率产生和排放甲烷（7至30（g CH_4 m〜（-3）d〜（-1） ）分别在25℃和270至700（g CH_4 m〜（-2）yr〜（-1））。夏季甲烷沸腾（ME）高峰是冬季极小值的4至10倍，并且甲烷沉积物的形成主要由上部沉积物（深度0.14至0.2 m）决定。季节性ME动态的关键驱动因素是温度。通过实验室培养得出的甲烷形成与温度和沉积物深度相关的经验模型再现了从冬季到仲夏的每日沸腾，尽管夏末和秋季模拟的ME超过了观测到的ME。错误的可能解释是基材限制。我们建议测量！甲烷生成甲烷的可用碳源来识别底物的局限性，并有助于表征甲烷形成随深度和位置的变化。

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  • 来源
    《Environmental Science & Technology》 |2015年第22期|13121-13129|共9页
  • 作者

    Jeremy Wilkinson; Andreas Maeck; Zeyad Alshboul; Andreas Lorke;

  • 作者单位

    University of Koblenz-Landau, Institute for Environmental Sciences, Fortstr. 7, 76829 Landau, Germany;

    Senect GmbH & Co. KG, An 44 - No. 11, 76829 Landau, Germany;

    University of Koblenz-Landau, Institute for Environmental Sciences, Fortstr. 7, 76829 Landau, Germany;

    University of Koblenz-Landau, Institute for Environmental Sciences, Fortstr. 7, 76829 Landau, Germany;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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  • 正文语种 eng
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