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Diurnal tracking of anthropogenic CO_2 emissions in the Los Angeles basin megacity during spring 2010

Newman, S. and Jeong, S. and Fischer, M. L. and Xu, X. and Haman, C. L. and Lefer, B. and Alvarez, S. and Rappenglueck, B. and Kort, E. A. and Andrews, A. E. and Peisch, J. and Gurney, K. R. and Miller, C. E. and Yung, Y. L. (2013) Diurnal tracking of anthropogenic CO_2 emissions in the Los Angeles basin megacity during spring 2010. Atmospheric Chemistry and Physics, 13 (8). pp. 4359-4372. ISSN 1680-7316. doi:10.5194/acp-13-4359-2013.

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Attributing observed CO_2 variations to human or natural cause is critical to deducing and tracking emissions from observations. We have used in situ CO_2, CO, and planetary boundary layer height (PBLH) measurements recorded during the CalNex-LA (CARB et al., 2008) ground campaign of 15 May–15 June 2010, in Pasadena, CA, to deduce the diurnally varying anthropogenic component of observed CO_2 in the megacity of Los Angeles (LA). This affordable and simple technique, validated by carbon isotope observations and WRF-STILT (Weather Research and Forecasting model – Stochastic Time-Inverted Lagrangian Transport model) predictions, is shown to robustly attribute observed CO_2 variation to anthropogenic or biogenic origin over the entire diurnal cycle. During CalNex-LA, local fossil fuel combustion contributed up to ~50% of the observed CO_2 enhancement overnight, and ~100% of the enhancement near midday. This suggests that sufficiently accurate total column CO_2 observations recorded near midday, such as those from the GOSAT or OCO-2 satellites, can potentially be used to track anthropogenic emissions from the LA megacity.

Item Type:Article
Related URLs:
URLURL TypeDescription
Newman, S.0000-0003-0710-995X
Jeong, S.0000-0003-2032-0127
Fischer, M. L.0000-0001-7956-2361
Lefer, B.0000-0001-9520-5495
Kort, E. A.0000-0003-4940-7541
Andrews, A. E.0000-0002-8552-3999
Gurney, K. R.0000-0001-9218-7164
Miller, C. E.0000-0002-9380-4838
Yung, Y. L.0000-0002-4263-2562
Additional Information:© 2013 Author(s). Published by Copernicus Publications on behalf of the European Geosciences Union. This work is distributed under the Creative Commons Attribution 3.0 License. Received: 20 January 2012; Published in Atmos. Chem. Phys. Discuss.: 22 February 2012 Revised: 18 February 2013; Accepted: 29 March 2013; Published: 26 April 2013. We appreciate productive discussions with Paul Wennberg, Debra Wunch, Michael Line, Xi Zhang, Run-Lie Shia, and Joshua Kammer. WRF winds for the timeaveraged footprints during the CalNex period were provided by Wayne Angevine of NOAA (Earth System Research Laboratory; ESRL).We thank Paul Novelli and Colm Sweeney of NOAA-ESRL for sharing their data that went into the NOAA background curtain product from which we calculated the time-varying background for CO. John S. Holloway (NOAA ESRL) provided the measurements of CO from the P3 aircraft profiles. As part of the CalNex-LA campaign, we gratefully acknowledge the support of Caltech and the California Air Resources Board in making the campaign successful. TCCON data (version GGG2012) were obtained from the TCCON Data Archive, operated by the California Institute of Technology, from the website at SN acknowledges financial support from JPL’s Director’s Research and Development Fund. Analysis by MLF and SJ was supported by the Director, Office of Science, of the US Department of Energy under Contract No. DE-AC02-05CH11231. We acknowledge the Keck Institute for Space Studies for financial support of publication costs and contribution by EAK. Edited by: M. K. Dubey
Group:Keck Institute for Space Studies
Funding AgencyGrant Number
JPL Director’s Research and Development FundUNSPECIFIED
Department of Energy (DOE)DE-AC02-05CH11231
Keck Institute for Space Studies (KISS)UNSPECIFIED
Issue or Number:8
Record Number:CaltechAUTHORS:20130712-114557472
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Official Citation:Newman, S., Jeong, S., Fischer, M. L., Xu, X., Haman, C. L., Lefer, B., Alvarez, S., Rappenglueck, B., Kort, E. A., Andrews, A. E., Peischl, J., Gurney, K. R., Miller, C. E., and Yung, Y. L.: Diurnal tracking of anthropogenic CO2 emissions in the Los Angeles basin megacity during spring 2010, Atmos. Chem. Phys., 13, 4359-4372, doi:10.5194/acp-13-4359-2013, 2013.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:39343
Deposited On:12 Jul 2013 22:21
Last Modified:09 Nov 2021 23:44

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