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首页> 外文期刊>Environmental Science & Technology >Assessment of Regional Methane Emission Inventories through Airborne Quantification in the San Francisco Bay Area
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Assessment of Regional Methane Emission Inventories through Airborne Quantification in the San Francisco Bay Area

机译：通过旧金山湾区空中量化评估区域甲烷排放清单

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摘要

This study derives methane emission rates from 92 airborne observations collected over 23 facilities including 5 refineries, 10 landfills, 4 wastewater treatment plants (POTWs), 2 composting operations, and 2 dairies in the San Francisco Bay Area. Emission rates are measured using an airborne mass-balance technique from a low-flying aircraft. Annual measurement-based sectorwide methane emissions are 19,000 ± 2300 Mg for refineries, 136,700 ± 25,900 Mg for landfills, 11,900 ± 1,500 Mg for POTWs, and 11,100 ± 3,400 Mg for composting. The average of measured emissions for each refinery ranges from 4 to 23 times larger than the corresponding emissions reported to regulatory agencies, while measurement-derived landfill and POTW estimates are approximately twice the current inventory estimates. Significant methane emissions at composting facilities indicate that a California mandate to divert organics from landfills to composting may not be an effective measure for mitigating methane emissions unless best management practices are instituted at composting facilities. Complementary evidence from airborne remote sensing imagery indicates atmospheric venting from refinery hydrogen plants, landfill working surfaces, composting stockpiles, etc., to be among the specific source types responsible for the observed discrepancies. This work highlights the value of multiple measurement approaches to accurately estimate facility-scale methane emissions and perform source attribution at subfacility scales to guide and verify effective mitigation policy and action.
机译：本研究衍生出92个机载观察的甲烷排放率，包括在23种设施中，包括5种炼油厂，10个垃圾填埋场，4个废水处理厂（Potws），2个堆肥运营和2个堆垛机湾地区。使用来自低飞行飞机的空气传播质量平衡技术测量排放率。用于炼油厂的年度测量型甲烷排放为19,000±2300毫克，用于填埋场136,700±25,900毫克，用于Potws 11,900±1,500 mg，堆肥11,100±3,400毫克。每个炼油厂的测量排放量的平均值范围为4至23倍，比向监管机构报告的相应排放量大，而测量填埋场和Potw估计数约为当前库存估计的两倍。堆肥设施的显着甲烷排放表明，加州授权将有机物从垃圾填埋场转移到堆肥可能不是减轻甲烷排放的有效措施，除非在堆肥设施所制定的最佳管理实践。来自空中遥感图像的互补证据表明炼油厂氢气植物，垃圾填埋场工作表面，堆肥库存等的大气排放，是负责观察到的差异的特定源类型。这项工作突出了多种测量方法的价值，以准确估计设施级甲烷排放，并在子空间性尺度下进行源归因，以指导和验证有效的缓解政策和行动。

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  • 来源
    《Environmental Science & Technology》 |2020年第15期|9254-9264|共11页
  • 作者

    Abhinav Guha; Sally Newman; David Fairley; Tan M. Dinh; Linda Duca; Stephen C. Conley; Mackenzie L. Smith; Andrew K. Thorpe; Riley M. Duren; Daniel H. Cusworth; Kelsey T. Foster; Marc L. Fischer; Seongeun Jeong; Nazli Yesiller; James L. Hanson; Philip T. Martien;

  • 作者单位

    Bay Area Air Quality Management District San Francisco California 94105 United States;

    Bav Area Air Quality Management District San Francisco California 94105 United States;

    Bay Area Air Quality Management District San Francisco California 94W5 United States;

    Bav Area Air Quality Management District San Francisco California 94105 United States;

    Bay Area Air Quality Management District San Francisco California 94105 United States;

    Scientific Aviation Inc. Boulder Colorado 80301 United States;

    Scientific Aviation Inc. Boulder Colorado 80301 United States;

    Jet Propulsion Laboratory California Institute of Technology Pasadena California 91109 United States;

    Jet Propulsion Laboratory California Institute of Technology Pasadena California 91109 United States;

    Jet Propulsion Laboratory California Institute of Technology Pasadena California 91109 United States;

    Jet Propulsion Laboratory California Institute of Technology Pasadena California 91109 United States;

    Energy Analysis and Environmental Impacts Division Lawrence Berkeley National Laboratory Berkeley California 94720 United States;

    Energy Analysis and Environmental Impacts Division Lawrence Berkeley National Laboratory Berkeley California 94720 United States;

    Global Waste Research Institute California Polytechnic State University San Luis Obispo California 93405 United States;

    Civil and Environmental Engineering Department California Polytechnic State University San Luis Obispo California 93405 United States;

    Bay Area Air Quality Management District San Francisco California 94105 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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