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This paper presents an analysis of methane emissions from the Los Angeles Basin at monthly timescales across a 4-year time period – from September 2011 to August 2015. Using observations acquired by a ground-based near-infrared remote sensing instrument on Mount

This paper presents an analysis of methane emissions from the Los Angeles Basin at monthly timescales across a 4-year time period – from September 2011 to August 2015. Using observations acquired by a ground-based near-infrared remote sensing instrument on Mount Wilson, California, combined with atmospheric CH4–CO2 tracer–tracer correlations, we observed −18 to +22 % monthly variability in CH4 : CO2 from the annual mean in the Los Angeles Basin. Top-down estimates of methane emissions for the basin also exhibit significant monthly variability (−19 to +31 % from annual mean and a maximum month-to-month change of 47 %). During this period, methane emissions consistently peaked in the late summer/early fall and winter. The estimated annual methane emissions did not show a statistically significant trend over the 2011 to 2015 time period.

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    Title
    • Monthly Trends of Methane Emissions in Los Angeles From 2011 to 2015 Inferred by CLARS-FTS Observations
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    Date Created
    2016-10-26
    Resource Type
  • Text
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    Identifier
    • Digital object identifier: 10.5194/acp-16-13121-2016
    • Identifier Type
      International standard serial number
      Identifier Value
      1680-7316
    • Identifier Type
      International standard serial number
      Identifier Value
      1680-7324
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    • This article and any associated published material is distributed under the Creative Commons Attribution 3.0 License. View the article as published at: https://www.atmos-chem-phys.net/16/13121/2016/

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    This is a suggested citation. Consult the appropriate style guide for specific citation guidelines.

    Wong, C. K., Pongetti, T. J., Oda, T., Rao, P., Gurney, K. R., Newman, S., . . . Sander, S. P. (2016). Monthly trends of methane emissions in Los Angeles from 2011 to 2015inferred by CLARS-FTS observations. Atmospheric Chemistry and Physics, 16(20), 13121-13130. doi:10.5194/acp-16-13121-2016

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