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Radiocarbon measurements reveal underestimated fossil CH₄ and CO₂ emissions in London
File(s)
Author(s)
Zazzeri, Giulia
Graven, Heather
Xu, Xiaomei
Saboya, Eric
Blyth, Liam
Type
Journal Article
Abstract
Radiocarbon (14C) is a powerful tracer of fossil emissions because fossil fuels are entirely depleted in 14C, but observations of 14CO2 and especially 14CH4 in urban regions are sparse. We present the first observations of 14C in both methane (CH4) and carbon dioxide (CO2) in an urban area (London) using a recently developed sampling system. We find that the fossil fraction of CH4 and the atmospheric concentration of fossil CO2 are consistently higher than simulated values using the atmospheric dispersion model NAME coupled with emission inventories. Observed net biospheric uptake in June–July is not well correlated with simulations using the SMURF model with NAME. The results show the partitioning of fossil and biospheric CO2 and CH4 in cities can be evaluated and improved with 14C observations when the nuclear power plants influence is negligible.
Date Issued
2023-08-16
Date Acceptance
2023-07-16
Citation
Geophysical Research Letters, 2023, 50 (15)
URI
URL
DOI
ISSN
0094-8276
Publisher
Wiley Open Access
Journal / Book Title
Geophysical Research Letters
Volume
50
Issue
15
Copyright Statement
© 2023 The Authors.

This is an open access article under the terms of the Creative Commons Attribution-NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.
License URL
Identifier
https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:001053991000001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=a2bf6146997ec60c407a63945d4e92bb
Subjects
atmospheric carbon dioxide
ATMOSPHERIC CO2
atmospheric methane
C-14
CARBON-DIOXIDE
FLUXES
fossil emissions
FUEL CO2
Geology
Geosciences, Multidisciplinary
greenhouse gases in cities
METHANE
MODEL
NUCLEAR-POWER-PLANTS
Physical Sciences
radiocarbon
Science & Technology
UK
Publication Status
Published
Article Number
e2023GL103834
Date Publish Online
2023-07-27