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A Synthesis Inversion to Constrain Global Emissions of Two Very Short Lived Chlorocarbons: Dichloromethane, and Perchloroethylene

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A Synthesis Inversion to Constrain Global Emissions of Two Very Short Lived Chlorocarbons: Dichloromethane, and Perchloroethylene. / Claxton, Tom; Hossaini, Ryan; Wilson, Chris et al.
In: Journal of Geophysical Research: Atmospheres, Vol. 125, No. 12, e2019JD031818, 27.06.2020.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Claxton, T, Hossaini, R, Wilson, C, Montzka, SA, Chipperfield, MP, Wild, O, Bednarz, E, Carpenter, L, Andrews, S, Hackenberg, S, Mühle, J, Oram, D, Park, S, Park, M-K, Atlas, E, Navarro, M, Schauffler, S, Sherry, D, Vollmer, M, Schuck, T, Engel, A, Krummel, PB, Maione, M, Arduini, J, Saito, T, Yokouchi, Y, O'Doherty, S, Young, D & Lunder, C 2020, 'A Synthesis Inversion to Constrain Global Emissions of Two Very Short Lived Chlorocarbons: Dichloromethane, and Perchloroethylene', Journal of Geophysical Research: Atmospheres, vol. 125, no. 12, e2019JD031818. https://doi.org/10.1029/2019JD031818

APA

Claxton, T., Hossaini, R., Wilson, C., Montzka, S. A., Chipperfield, M. P., Wild, O., Bednarz, E., Carpenter, L., Andrews, S., Hackenberg, S., Mühle, J., Oram, D., Park, S., Park, M-K., Atlas, E., Navarro, M., Schauffler, S., Sherry, D., Vollmer, M., ... Lunder, C. (2020). A Synthesis Inversion to Constrain Global Emissions of Two Very Short Lived Chlorocarbons: Dichloromethane, and Perchloroethylene. Journal of Geophysical Research: Atmospheres, 125(12), Article e2019JD031818. https://doi.org/10.1029/2019JD031818

Vancouver

Claxton T, Hossaini R, Wilson C, Montzka SA, Chipperfield MP, Wild O et al. A Synthesis Inversion to Constrain Global Emissions of Two Very Short Lived Chlorocarbons: Dichloromethane, and Perchloroethylene. Journal of Geophysical Research: Atmospheres. 2020 Jun 27;125(12):e2019JD031818. Epub 2020 Apr 8. doi: 10.1029/2019JD031818

Author

Claxton, Tom ; Hossaini, Ryan ; Wilson, Chris et al. / A Synthesis Inversion to Constrain Global Emissions of Two Very Short Lived Chlorocarbons: Dichloromethane, and Perchloroethylene. In: Journal of Geophysical Research: Atmospheres. 2020 ; Vol. 125, No. 12.

Bibtex

@article{dd267c45ac264b50a7de658903189011,
title = "A Synthesis Inversion to Constrain Global Emissions of Two Very Short Lived Chlorocarbons: Dichloromethane, and Perchloroethylene",
abstract = "Dichloromethane (CH2Cl2) and perchloroethylene (C2Cl4) are chlorinated Very Short‐Lived Substances (Cl‐VSLS) with anthropogenic sources. Recent studies highlight the increasing influence of such compounds, particularly CH2Cl2, on the stratospheric chlorine budget and therefore on ozone depletion. Here, a multi‐year global‐scale synthesis inversion was performed to optimise CH2Cl2 (2006‐2017) and C2Cl4 (2007‐2017) emissions. The approach combines long‐term surface observations from global monitoring networks, output from a three‐dimensional chemical transport model (TOMCAT), and novel bottom‐up information on prior industry emissions. Our posterior results show an increase in global CH2Cl2 emissions from 637 ±36 Gg yr‐1 in 2006 to 1171 ±45 Gg yr‐1 in 2017, with Asian emissions accounting for 68% and 89% of these totals, respectively. In absolute terms, Asian CH2Cl2 emissions increased annually by 51 Gg yr‐1 over the study period, while European and North American emissions declined, indicating a continental‐scale shift in emission distribution since the mid‐2000s. For C2Cl4, we estimate a decrease in global emissions from 141 ±14 Gg yr‐1 in 2007 to 106 ±12 Gg yr‐1 in 2017. The time‐varying posterior emissions offer significant improvements over the prior. Utilising the posterior emissions leads to modelled tropospheric CH2Cl2 and C2Cl4 abundances and trends in good agreement to those observed (including independent observations to the inversion). A shorter C2Cl4 lifetime, from including an uncertain Cl sink, leads to larger global C2Cl4 emissions by a factor of ~1.5, which in some places improves model‐measurement agreement. The sensitivity of our findings to assumptions in the inversion procedure, including CH2Cl2 oceanic emissions, is discussed.",
keywords = "vsls, inversion, emissions, dichloromethane, perchloroethylene, montreal protocol",
author = "Tom Claxton and Ryan Hossaini and Chris Wilson and Montzka, {Stephen A.} and Chipperfield, {Martyn P.} and Oliver Wild and Ewa Bednarz and Lucy Carpenter and Stephen Andrews and Sina Hackenberg and Jens M{\"u}hle and David Oram and Sunyoung Park and Mi-Kyung Park and Elliot Atlas and Maria Navarro and Sue Schauffler and David Sherry and Martin Vollmer and Tanja Schuck and Andreas Engel and Krummel, {Paul B.} and Michela Maione and Jgor Arduini and Takuya Saito and Yoko Yokouchi and Simon O'Doherty and Dickon Young and Chris Lunder",
year = "2020",
month = jun,
day = "27",
doi = "10.1029/2019JD031818",
language = "English",
volume = "125",
journal = "Journal of Geophysical Research: Atmospheres",
issn = "0747-7309",
publisher = "Wiley-Blackwell Publishing Ltd",
number = "12",

}

RIS

TY - JOUR

T1 - A Synthesis Inversion to Constrain Global Emissions of Two Very Short Lived Chlorocarbons: Dichloromethane, and Perchloroethylene

AU - Claxton, Tom

AU - Hossaini, Ryan

AU - Wilson, Chris

AU - Montzka, Stephen A.

AU - Chipperfield, Martyn P.

AU - Wild, Oliver

AU - Bednarz, Ewa

AU - Carpenter, Lucy

AU - Andrews, Stephen

AU - Hackenberg, Sina

AU - Mühle, Jens

AU - Oram, David

AU - Park, Sunyoung

AU - Park, Mi-Kyung

AU - Atlas, Elliot

AU - Navarro, Maria

AU - Schauffler, Sue

AU - Sherry, David

AU - Vollmer, Martin

AU - Schuck, Tanja

AU - Engel, Andreas

AU - Krummel, Paul B.

AU - Maione, Michela

AU - Arduini, Jgor

AU - Saito, Takuya

AU - Yokouchi, Yoko

AU - O'Doherty, Simon

AU - Young, Dickon

AU - Lunder, Chris

PY - 2020/6/27

Y1 - 2020/6/27

N2 - Dichloromethane (CH2Cl2) and perchloroethylene (C2Cl4) are chlorinated Very Short‐Lived Substances (Cl‐VSLS) with anthropogenic sources. Recent studies highlight the increasing influence of such compounds, particularly CH2Cl2, on the stratospheric chlorine budget and therefore on ozone depletion. Here, a multi‐year global‐scale synthesis inversion was performed to optimise CH2Cl2 (2006‐2017) and C2Cl4 (2007‐2017) emissions. The approach combines long‐term surface observations from global monitoring networks, output from a three‐dimensional chemical transport model (TOMCAT), and novel bottom‐up information on prior industry emissions. Our posterior results show an increase in global CH2Cl2 emissions from 637 ±36 Gg yr‐1 in 2006 to 1171 ±45 Gg yr‐1 in 2017, with Asian emissions accounting for 68% and 89% of these totals, respectively. In absolute terms, Asian CH2Cl2 emissions increased annually by 51 Gg yr‐1 over the study period, while European and North American emissions declined, indicating a continental‐scale shift in emission distribution since the mid‐2000s. For C2Cl4, we estimate a decrease in global emissions from 141 ±14 Gg yr‐1 in 2007 to 106 ±12 Gg yr‐1 in 2017. The time‐varying posterior emissions offer significant improvements over the prior. Utilising the posterior emissions leads to modelled tropospheric CH2Cl2 and C2Cl4 abundances and trends in good agreement to those observed (including independent observations to the inversion). A shorter C2Cl4 lifetime, from including an uncertain Cl sink, leads to larger global C2Cl4 emissions by a factor of ~1.5, which in some places improves model‐measurement agreement. The sensitivity of our findings to assumptions in the inversion procedure, including CH2Cl2 oceanic emissions, is discussed.

AB - Dichloromethane (CH2Cl2) and perchloroethylene (C2Cl4) are chlorinated Very Short‐Lived Substances (Cl‐VSLS) with anthropogenic sources. Recent studies highlight the increasing influence of such compounds, particularly CH2Cl2, on the stratospheric chlorine budget and therefore on ozone depletion. Here, a multi‐year global‐scale synthesis inversion was performed to optimise CH2Cl2 (2006‐2017) and C2Cl4 (2007‐2017) emissions. The approach combines long‐term surface observations from global monitoring networks, output from a three‐dimensional chemical transport model (TOMCAT), and novel bottom‐up information on prior industry emissions. Our posterior results show an increase in global CH2Cl2 emissions from 637 ±36 Gg yr‐1 in 2006 to 1171 ±45 Gg yr‐1 in 2017, with Asian emissions accounting for 68% and 89% of these totals, respectively. In absolute terms, Asian CH2Cl2 emissions increased annually by 51 Gg yr‐1 over the study period, while European and North American emissions declined, indicating a continental‐scale shift in emission distribution since the mid‐2000s. For C2Cl4, we estimate a decrease in global emissions from 141 ±14 Gg yr‐1 in 2007 to 106 ±12 Gg yr‐1 in 2017. The time‐varying posterior emissions offer significant improvements over the prior. Utilising the posterior emissions leads to modelled tropospheric CH2Cl2 and C2Cl4 abundances and trends in good agreement to those observed (including independent observations to the inversion). A shorter C2Cl4 lifetime, from including an uncertain Cl sink, leads to larger global C2Cl4 emissions by a factor of ~1.5, which in some places improves model‐measurement agreement. The sensitivity of our findings to assumptions in the inversion procedure, including CH2Cl2 oceanic emissions, is discussed.

KW - vsls

KW - inversion

KW - emissions

KW - dichloromethane

KW - perchloroethylene

KW - montreal protocol

U2 - 10.1029/2019JD031818

DO - 10.1029/2019JD031818

M3 - Journal article

VL - 125

JO - Journal of Geophysical Research: Atmospheres

JF - Journal of Geophysical Research: Atmospheres

SN - 0747-7309

IS - 12

M1 - e2019JD031818

ER -