Carbon dioxide and methane measurements from the Los Angeles Megacity Carbon Project – Part 1: calibration, urban enhancements, and uncertainty estimates

Verhulst, Kristal R.; Karion, Anna; Kim, Jooil; Salameh, Peter K.; Keeling, Ralph F.; Newman, Sally; Miller, John; Sloop, Christopher; Pongetti, Thomas; Rao, Preeti; Wong, Clare; Hopkins, Francesca M.; Yadav, Vineet; Weiss, Ray F.; Duren, Riley M.; Miller, Charles E.

doi:https://doi.org/10.5194/acp-17-8313-2017

Articles | Volume 17, issue 13

https://doi.org/10.5194/acp-17-8313-2017

© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.

https://doi.org/10.5194/acp-17-8313-2017

© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 17, issue 13

Research article

|

07 Jul 2017

Research article |

| 07 Jul 2017

Carbon dioxide and methane measurements from the Los Angeles Megacity Carbon Project – Part 1: calibration, urban enhancements, and uncertainty estimates

Kristal R. Verhulst, Anna Karion, Jooil Kim, Peter K. Salameh, Ralph F. Keeling, Sally Newman, John Miller, Christopher Sloop, Thomas Pongetti, Preeti Rao, Clare Wong, Francesca M. Hopkins, Vineet Yadav, Ray F. Weiss, Riley M. Duren, and Charles E. Miller

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Final revised paper (published on 07 Jul 2017)
Supplement to the final revised paper
Preprint (discussion started on 04 Oct 2016)
Supplement to the preprint

Interactive discussion

Status: closed

AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment

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- Supplement

RC1: 'Review of "Carbon Dioxide and Methane Measurements from the Los Angeles Megacity Carbon Project: 1. Calibration, Urban Enhancements, and Uncertainty Estimates" by Verhulst et al.', Anonymous Referee #1, 16 Nov 2016
- AC2: 'Response to Referee #1 Comments', Kristal R. Verhulst, 05 Apr 2017
SC1: 'Short comment', Levi Golston, 15 Dec 2016
- AC1: 'Response to short comment', Kristal R. Verhulst, 04 Apr 2017
RC2: 'Review of Verhulst et al. (2017)', Anonymous Referee #2, 31 Jan 2017
- AC3: 'Response to Referee #2 Comments', Kristal R. Verhulst, 05 Apr 2017
RC3: 'Referee Comment on: Carbon Dioxide and Methane Measurements from the Los Angeles Megacity Carbon Project: 1. Calibration, Urban Enhancements, and Uncertainty Estimates', Anonymous Referee #3, 02 Feb 2017
- AC4: 'Response to Anonymous Referee #3 Comments', Kristal R. Verhulst, 06 Apr 2017

Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision

AR by Kristal R. Verhulst on behalf of the Authors (06 Apr 2017) Author's response Manuscript

ED: Publish as is (01 May 2017) by Robert McLaren

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Short summary

We present the first carbon dioxide (CO₂) and methane (CH₄) measurements from an extensive surface network as part of the Los Angeles Megacity Carbon Project. We describe methods that are essential for understanding carbon fluxes from complex urban environments. CO₂ and CH₄ levels are spatially and temporally variable, with urban sites showing significant enhancements relative to background. In 2015, the median afternoon enhancement near downtown Los Angeles was ~15 ppm CO₂ and ~80 ppb CH₄.