Tropical tropospheric ozone and carbon monoxide distributions: characteristics, origins, and  control factors, as seen by IAGOS and IASI

Tsivlidou, Maria; Sauvage, Bastien; Bennouna, Yasmine; Blot, Romain; Boulanger, Damien; Clark, Hannah; Le Flochmoën, Eric; Nédélec, Philippe; Thouret, Valérie; Wolff, Pawel; Barret, Brice

doi:https://doi.org/10.5194/acp-23-14039-2023

Articles | Volume 23, issue 21

https://doi.org/10.5194/acp-23-14039-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-23-14039-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 23, issue 21

Research article

|

10 Nov 2023

Research article |

| 10 Nov 2023

Tropical tropospheric ozone and carbon monoxide distributions: characteristics, origins, and control factors, as seen by IAGOS and IASI

Maria Tsivlidou, Bastien Sauvage, Yasmine Bennouna, Romain Blot, Damien Boulanger, Hannah Clark, Eric Le Flochmoën, Philippe Nédélec, Valérie Thouret, Pawel Wolff, and Brice Barret

Supplement

https://doi.org/10.5194/acp-23-14039-2023-supplement

Data sets

Source attribution using FLEXPART and carbon monoxide emission inventories: SOFT-IO version 1.0 B. Sauvage, A. Auby, and A. Fontaine https://doi.org/10.25326/2

IAGOS ancillary data (L4) - CO contributions to the aircraft measurements B. Sauvage, P. Nédélec, and D. Boulanger https://doi.org/10.25326/3

IAGOS Data Portal D. Boulanger, V. Thouret, and A. Petzold https://doi.org/10.25326/20

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Short summary

The tropics are a region where the ozone increase has been most apparent since 1980 and where observations are sparse. Using aircraft, satellite, and model data, we document the characteristics of tropospheric ozone and CO over the whole tropics for the last 2 decades. We explore the origin of the observed CO anomalies and investigate transport processes driving the tropical CO and O₃ distribution. Our study highlights the importance of anthropogenic emissions, mostly over the northern tropics.