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首页> 外文期刊>Environmental Science & Technology >Airborne Ethane Observations in the Barnett Shale: Quantification of Ethane Flux and Attribution of Methane Emissions
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Airborne Ethane Observations in the Barnett Shale: Quantification of Ethane Flux and Attribution of Methane Emissions

机译：Barnett页岩中的空中乙烷观测：乙烷通量的量化和甲烷排放的归因

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摘要

We present high time resolution airborne ethane (C_2H_6) and methane (CH_4) measurements made in March and October 2013 as part of the Barnett Coordinated Campaign over the Barnett Shale formation in Texas. Ethane fluxes are quantified using a downwind flight strategy, a first demonstration of this approach for C_2H_6. Additionally, ethane-to-methane emissions ratios (C_2H_6:CH_4) of point sources were observationally determined from simultaneous airborne C_2H_6 and CH_4 measurements during a survey flight over the source region. Distinct C_2H_6:CH_4 × 100% molar ratios of 0.0%, 1.8%, and 9.6%, indicative of microbial, low-C_2H_6 fossil, and high-C-2H_6 fossil sources, respectively, emerged in observations over the emissions source region of the Barnett Shale. Kthane-to-methane correlations were used in conjunction with C_2H_6 and CH_4 fluxes to quantify the fraction of CH_4 emissions derived from fossil and microbial sources. On the basis of two analyses, we find 71-85% of the observed methane emissions quantified in the Barnett Shale are derived from fossil sources. The average ethane flux observed from the studied region of the Barnett Shale was 6.6 ± 0.2 × 10~3 kg hr~(-1) and consistent across six days in spring and fall of 2013.
机译：我们提供了2013年3月和10月进行的高分辨率的空气中乙烷（C_2H_6）和甲烷（CH_4）的测量，这是德克萨斯州Barnett页岩地层的Barnett协调运动的一部分。使用顺风飞行策略对乙烷通量进行量化，这是针对C_2H_6的这种方法的首次证明。此外，在源头地区的一次调查飞行中，根据同时进行的机载C_2H_6和CH_4的测量值，观察地确定了点源的乙烷与甲烷的排放比（C_2H_6：CH_4）。 C_2H_6：CH_4×100％的独特摩尔比为0.0％，1.8％和9.6％，分别表明微生物，低C_2H_6化石和高C-2H_6化石的来源，分别来自该地区的排放源区域。巴尼特页岩。甲烷与甲烷的相关性与C_2H_6和CH_4通量结合使用，以量化源自化石和微生物来源的CH_4排放量的比例。根据两次分析，我们发现Barnett页岩中量化的甲烷排放量中有71-85％来自化石资源。从Barnett页岩研究区域观察到的平均乙烷通量为6.6±0.2×10〜3 kg hr〜（-1），在2013年春季和秋季的六天内保持一致。

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  • 来源
    《Environmental Science & Technology》 |2015年第13期|8158-8166|共9页
  • 作者

    Mackenzie L. Smith; Eric A. Kort; Anna Karion; Colm Sweeney; Scott C. Herndon; Tara I. Yacovitch;

  • 作者单位

    Atmospheric, Oceanic, and Space Sciences, University of Michigan, Ann Arbor, Michigan 48109, United States;

    Atmospheric, Oceanic, and Space Sciences, University of Michigan, Ann Arbor, Michigan 48109, United States;

    CIRES, University of Colorado, Boulder, Colorado 80309, United States,NOAA Earth System Research Laboratory, Boulder, Colorado 80305, United States;

    CIRES, University of Colorado, Boulder, Colorado 80309, United States,NOAA Earth System Research Laboratory, Boulder, Colorado 80305, United States;

    Aerodyne Research, Inc., Billerica, Massachusetts 01821, United States;

    Aerodyne Research, Inc., Billerica, Massachusetts 01821, United States;

  • 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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