Atmospheric lifetime of sulphur hexafluoride (SF<sub>6</sub>) and five other trace gases in the BASCOE model driven by three reanalyses

Vervalcke, Sarah; Errera, Quentin; Eichinger, Roland; Reddmann, Thomas; Chabrillat, Simon; Op de beeck, Marc; Stiller, Gabriele; Mahieu, Emmanuel

doi:10.5194/acp-26-391-2026

Articles | Volume 26, issue 1

https://doi.org/10.5194/acp-26-391-2026

© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

The SPARC Reanalysis Intercomparison Project (S-RIP) Phase...

https://doi.org/10.5194/acp-26-391-2026

© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 26, issue 1

Research article

|

08 Jan 2026

Research article |

| 08 Jan 2026

Atmospheric lifetime of sulphur hexafluoride (SF₆) and five other trace gases in the BASCOE model driven by three reanalyses

Sarah Vervalcke, Quentin Errera, Roland Eichinger, Thomas Reddmann, Simon Chabrillat, Marc Op de beeck, Gabriele Stiller, and Emmanuel Mahieu

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Aug 2025	2,334	30	6	2,370
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Nov 2025	72	60	18	150
Dec 2025	158	90	26	274
Jan 2026	540	243	21	804
Feb 2026	521	110	14	645
Mar 2026	272	161	15	448
Apr 2026	174	151	11	336
May 2026	164	57	9	230
Jun 2026	28	9	3	40
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Aug 2026	51	56	40	147
Sep 2026	58	63	39	160

Cumulative views and downloads (calculated since 13 Aug 2025)

Month	HTML	PDF	XML	Total
Aug 2025	2,334	30	6	2,370
Sep 2025	1,406	36	18	1,460
Oct 2025	148	64	14	226
Nov 2025	72	60	18	150
Dec 2025	158	90	26	274
Jan 2026	540	243	21	804
Feb 2026	521	110	14	645
Mar 2026	272	161	15	448
Apr 2026	174	151	11	336
May 2026	164	57	9	230
Jun 2026	28	9	3	40
Jul 2026	122	50	19	191
Aug 2026	51	56	40	147
Sep 2026	58	63	39	160

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This study presents three simulations of atmospheric chemistry with the Belgian Assimilation System for Chemical Observations chemistry transport model, driven by different meteorological data sets. Newly implemented SF₆ chemistry enables stratospheric transport studies. Results agree with satellite observations. The derived lifetimes of six trace gases agree with the literature, but SF₆shows larger sensitivity to the choice of meteorology. The lifetime of SF₆ranges from 1900 to 2600 years.

Atmospheric lifetime of sulphur hexafluoride (SF₆) and five other trace gases in the BASCOE model driven by three reanalyses

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Atmospheric lifetime of sulphur hexafluoride (SF6) and five other trace gases in the BASCOE model driven by three reanalyses

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Atmospheric lifetime of sulphur hexafluoride (SF₆) and five other trace gases in the BASCOE model driven by three reanalyses