Natural and anthropogenic influence on tropospheric ozone variability over the Tropical Atlantic unveiled by satellite, reanalyses and in situ observations

Okamoto, Sachiko; Cuesta, Juan; Dufour, Gaëlle; Eremenko, Maxim; Miyazaki, Kazuyuki; Boonne, Cathy; Tanimoto, Hiroshi; Peischl, Jeff; Thompson, Chelsea

doi:10.5194/acp-26-4685-2026

Articles | Volume 26, issue 7

https://doi.org/10.5194/acp-26-4685-2026

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

Special issue:

Tropospheric Ozone Assessment Report Phase II (TOAR-II) Community...

https://doi.org/10.5194/acp-26-4685-2026

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

Articles | Volume 26, issue 7

Research article

|

09 Apr 2026

Research article |

| 09 Apr 2026

Natural and anthropogenic influence on tropospheric ozone variability over the Tropical Atlantic unveiled by satellite, reanalyses and in situ observations

Sachiko Okamoto, Juan Cuesta, Gaëlle Dufour, Maxim Eremenko, Kazuyuki Miyazaki, Cathy Boonne, Hiroshi Tanimoto, Jeff Peischl, and Chelsea Thompson

Supplement

https://doi.org/10.5194/acp-26-4685-2026-supplement

Data sets

The WWLLN Global Lightning Climatology and timeseries (WGLC) (v2022.0.0) J. O. Kaplan and K. H.-K. Lau https://doi.org/10.5281/zenodo.6007052

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Short summary

We analyse the distribution of tropospheric ozone over the Atlantic during February and October 2017 using a multispectral satellite synergism called IASI+GOME2, two chemistry reanalysis products and in situ airborne measurements. It reveals that a significant overestimation of two chemistry reanalysis products of lowermost troposphere ozone over the Atlantic in the Northern Hemisphere due to the overestimations of ozone precursors from anthropogenic sources from North America.