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Uncertainties of fluxes and ¹³C/¹²C ratios of atmospheric reactive-gas emissions

Gromov, Sergey and Brenninkmeijer, Carl A. M. and Jöckel, Patrick (2017) Uncertainties of fluxes and ¹³C/¹²C ratios of atmospheric reactive-gas emissions. Atmospheric Chemistry and Physics (ACP), 17 (13), pp. 8525-8552. Copernicus Publications. doi: 10.5194/acp-17-8525-2017. ISSN 1680-7316.

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Official URL: https://www.atmos-chem-phys.net/17/8525/2017/


We provide a comprehensive review of the proxy data on the 13C ∕ 12C ratios and uncertainties of emissions of reactive carbonaceous compounds into the atmosphere, with a focus on CO sources. Based on an evaluated set-up of the EMAC model, we derive the isotope-resolved data set of its emission inventory for the 1997–2005 period. Additionally, we revisit the calculus required for the correct derivation of uncertainties associated with isotope ratios of emission fluxes. The resulting δ13C of overall surface CO emission in 2000 of −(25. 2 ± 0. 7) ‰ is in line with previous bottom-up estimates and is less uncertain by a factor of 2. In contrast to this, we find that uncertainties of the respective inverse modelling estimates may be substantially larger due to the correlated nature of their derivation. We reckon the δ13C values of surface emissions of higher hydrocarbons to be within −24 to −27 ‰ (uncertainty typically below ±1 ‰), with an exception of isoprene and methanol emissions being close to −30 and −60 ‰, respectively. The isotope signature of ethane surface emission coincides with earlier estimates, but integrates very different source inputs. δ13C values are reported relative to V-PDB.

Item URL in elib:https://elib.dlr.de/113238/
Document Type:Article
Title:Uncertainties of fluxes and ¹³C/¹²C ratios of atmospheric reactive-gas emissions
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Gromov, SergeyMPI für Chemie, MainzUNSPECIFIED
Brenninkmeijer, Carl A. M.MPI für Chemie, MainzUNSPECIFIED
Jöckel, PatrickDLR, IPAhttps://orcid.org/0000-0002-8964-1394
Date:13 July 2017
Journal or Publication Title:Atmospheric Chemistry and Physics (ACP)
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In ISI Web of Science:Yes
Page Range:pp. 8525-8552
Publisher:Copernicus Publications
Keywords:carbon isotopes, atmospheric chemistry, emissions, EMAC model, Modular Earth Submodel System, MESSy
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Earth Observation
DLR - Research theme (Project):R - Atmospheric and climate research, V - Verkehrsentwicklung und Umwelt II (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Earth System Modelling
Deposited By: Jöckel, Dr. Patrick
Deposited On:17 Jul 2017 10:32
Last Modified:02 May 2019 13:59

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