Monthly trends of methane emissions in Los Angeles from 2011 to 2015 inferred by CLARS-FTS observations
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...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2016-10-01
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| Series: | Atmospheric Chemistry and Physics |
| Online Access: | https://www.atmos-chem-phys.net/16/13121/2016/acp-16-13121-2016.pdf |
| _version_ | 1828396392866906112 |
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| author | C. K. Wong C. K. Wong C. K. Wong T. J. Pongetti T. Oda T. Oda P. Rao K. R. Gurney S. Newman R. M. Duren C. E. Miller Y. L. Yung S. P. Sander |
| author_facet | C. K. Wong C. K. Wong C. K. Wong T. J. Pongetti T. Oda T. Oda P. Rao K. R. Gurney S. Newman R. M. Duren C. E. Miller Y. L. Yung S. P. Sander |
| author_sort | C. K. Wong |
| collection | DOAJ |
| description | 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 CH<sub>4</sub>–CO<sub>2</sub> tracer–tracer correlations, we observed
−18 to +22 % monthly variability in CH<sub>4</sub> : CO<sub>2</sub> 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. |
| first_indexed | 2024-12-10T08:29:17Z |
| format | Article |
| id | doaj.art-91ef4c430aa04780aa8a40c54894134c |
| institution | Directory Open Access Journal |
| issn | 1680-7316 1680-7324 |
| language | English |
| last_indexed | 2024-12-10T08:29:17Z |
| publishDate | 2016-10-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Atmospheric Chemistry and Physics |
| spelling | doaj.art-91ef4c430aa04780aa8a40c54894134c2022-12-22T01:56:09ZengCopernicus PublicationsAtmospheric Chemistry and Physics1680-73161680-73242016-10-0116131211313010.5194/acp-16-13121-2016Monthly trends of methane emissions in Los Angeles from 2011 to 2015 inferred by CLARS-FTS observationsC. K. Wong0C. K. Wong1C. K. Wong2T. J. Pongetti3T. Oda4T. Oda5P. Rao6K. R. Gurney7S. Newman8R. M. Duren9C. E. Miller10Y. L. Yung11S. P. Sander12NASA Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USADivision of Geological and Planetary Sciences, California Institute of Technology, Pasadena, California, USAcurrently at: California State University, Northridge, California, USANASA Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USAGoddard Earth Sciences Technology and Research, Universities Space Research Association, Columbia, Maryland, USAGlobal Modeling and Assimilation Office, NASA Goddard Space Flight Center, Greenbelt, Maryland, USANASA Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USASchool of Life Sciences, Arizona State University, Tempe, Arizona, USADivision of Geological and Planetary Sciences, California Institute of Technology, Pasadena, California, USANASA Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USANASA Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USADivision of Geological and Planetary Sciences, California Institute of Technology, Pasadena, California, USANASA Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USAThis 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 CH<sub>4</sub>–CO<sub>2</sub> tracer–tracer correlations, we observed −18 to +22 % monthly variability in CH<sub>4</sub> : CO<sub>2</sub> 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.https://www.atmos-chem-phys.net/16/13121/2016/acp-16-13121-2016.pdf |
| spellingShingle | C. K. Wong C. K. Wong C. K. Wong T. J. Pongetti T. Oda T. Oda P. Rao K. R. Gurney S. Newman R. M. Duren C. E. Miller Y. L. Yung S. P. Sander Monthly trends of methane emissions in Los Angeles from 2011 to 2015 inferred by CLARS-FTS observations Atmospheric Chemistry and Physics |
| title | Monthly trends of methane emissions in Los Angeles from 2011 to 2015
inferred by CLARS-FTS observations |
| title_full | Monthly trends of methane emissions in Los Angeles from 2011 to 2015
inferred by CLARS-FTS observations |
| title_fullStr | Monthly trends of methane emissions in Los Angeles from 2011 to 2015
inferred by CLARS-FTS observations |
| title_full_unstemmed | Monthly trends of methane emissions in Los Angeles from 2011 to 2015
inferred by CLARS-FTS observations |
| title_short | Monthly trends of methane emissions in Los Angeles from 2011 to 2015
inferred by CLARS-FTS observations |
| title_sort | monthly trends of methane emissions in los angeles from 2011 to 2015 inferred by clars fts observations |
| url | https://www.atmos-chem-phys.net/16/13121/2016/acp-16-13121-2016.pdf |
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