Articles | Volume 22, issue 5
© Author(s) 2022. This work is distributed underthe Creative Commons Attribution 4.0 License.
Continuous CH4 and δ13CH4 measurements in London demonstrate under-reported natural gas leakage
- Final revised paper (published on 17 Mar 2022)
- Supplement to the final revised paper
- Preprint (discussion started on 28 Sep 2021)
- Supplement to the preprint
Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor |
: Report abuse
- RC1: 'Comment on acp-2021-606', Anonymous Referee #2, 08 Oct 2021
- RC2: 'Comment on acp-2021-606', Anonymous Referee #3, 13 Oct 2021
- RC3: 'Comment on acp-2021-606', Anonymous Referee #1, 22 Oct 2021
- AC1: 'Comment on acp-2021-606', Eric Saboya, 26 Jan 2022
Peer review completion
AR: Author's response | RR: Referee report | ED: Editor decision
AR by Eric Saboya on behalf of the Authors (01 Feb 2022)  Author's response Author's tracked changes Manuscript
ED: Publish as is (04 Feb 2022) by Thomas Karl
AR by Eric Saboya on behalf of the Authors (11 Feb 2022)  Author's response Manuscript
In the manuscript entitled “Continuous CH4 and δ13CH4 measurements in London demonstrate under-reported natural gas leakage,” the authors utilize tower measurements of methane to evaluate the inventory representation of urban methane in London, in both the global EDGAR inventory as well as the national NAEI. The study investigates urban methane emissions which remain, despite the proximity to a large portion of the global population, a poorly characterized part of the methane budget. The finding that methane emissions associated with the natural gas infrastructure are undercounted in inventories is consistent with other studies of urban centers around the global, and points to an area where potential mitigation efforts are tangible, impactful, and requiring of further study.
The methodologies presented are consistent with those established in the literature previously, namely the use of an established atmospheric dispersion model used in conjunction with a gridded emission inventories to generate simulated signals for comparison with observations and isotopic source analysis with Keeling plots. The manuscript is organized in a logical manner and the writing is concise and mostly clear. At times, however, it reads more like a report than a research article. On a several occasions (detailed below in the ‘specific comments’), important details or context are missing from the text. With the inclusion of these additional details and discussion, I believe the manuscript meets the threshold for publication and would be of interest to the readers of ACP.