Deposition velocity concept does not apply to fluxes of  ambient aerosol

Kouznetsov, Rostislav; Sofiev, Mikhail; Uppstu, Andreas; Hänninen, Risto

doi:10.5194/gmd-19-1833-2026

Articles | Volume 19, issue 5

https://doi.org/10.5194/gmd-19-1833-2026

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

https://doi.org/10.5194/gmd-19-1833-2026

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

Articles | Volume 19, issue 5

Development and technical paper

|

04 Mar 2026

Development and technical paper |

| 04 Mar 2026

Deposition velocity concept does not apply to fluxes of ambient aerosol

Rostislav Kouznetsov, Mikhail Sofiev, Andreas Uppstu, and Risto Hänninen

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Jun 2025	214	36	10	260
Jul 2025	86	14	4	104
Aug 2025	970	18	10	998
Sep 2025	3,478	34	16	3,528
Oct 2025	150	24	4	178
Nov 2025	56	28	6	90
Dec 2025	104	24	14	142
Jan 2026	150	50	22	222
Feb 2026	112	30	8	150
Mar 2026	430	120	19	569
Apr 2026	174	75	11	260
May 2026	249	50	10	309
Jun 2026	30	16	6	52
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Cumulative views and downloads (calculated since 10 Jun 2025)

Month	HTML	PDF	XML	Total
Jun 2025	214	36	10	260
Jul 2025	86	14	4	104
Aug 2025	970	18	10	998
Sep 2025	3,478	34	16	3,528
Oct 2025	150	24	4	178
Nov 2025	56	28	6	90
Dec 2025	104	24	14	142
Jan 2026	150	50	22	222
Feb 2026	112	30	8	150
Mar 2026	430	120	19	569
Apr 2026	174	75	11	260
May 2026	249	50	10	309
Jun 2026	30	16	6	52
Jul 2026	40	22	8	70
Aug 2026	51	38	19	108
Sep 2026	172	78	53	303
Oct 2026	83	33	25	141

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Short summary

The paper addresses a two-order-of-magnitude discrepancy in deposition velocities of accumulation-mode aerosols measured with different methods. This uncertainty affects current atmospheric deposition models. By explicitly accounting for gas-particle transition and explicitly evaluating the observed quantities we could reproduce the observations . Resolving the discrepancy, reduces uncertainties in simulated concentrations and fallout.