Articles | Volume 25, issue 24
https://doi.org/10.5194/acp-25-18475-2025
https://doi.org/10.5194/acp-25-18475-2025
Research article
 | 
19 Dec 2025
Research article |  | 19 Dec 2025

Tropical tropospheric ozone trends (1998 to 2023): new perspectives from SHADOZ, IAGOS and OMI/MLS observations

Anne M. Thompson, Ryan M. Stauffer, Debra E. Kollonige, Jerald R. Ziemke, Bryan J. Johnson, Gary A. Morris, Patrick Cullis, María Cazorla, Jorge Andres Diaz, Ankie Piters, Igor Nedeljkovic, Truus Warsodikromo, Francisco Raimundo Silva, E. Thomas Northam, Patrick Benjamin, Thumeka Mkololo, Tshidi Machinini, Christian Félix, Gonzague Romanens, Syprose Nyadida, Jérôme Brioude, Stéphanie Evan, Jean-Marc Metzger, Ambun Dindang, Yuzaimi B. Mahat, Mohan Kumar Sammathuria, Norazura Binti Zakaria, Ninong Komala, Shin-Ya Ogino, Nguyen Thi Quyen, Francis S. Mani, Miriama Vuiyasawa, David Nardini, Matthew Martinsen, Darryl T. Kuniyuki, Katrin Müller, Pawel Wolff, and Bastien Sauvage

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Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse

Peer review completion

AR – Author's response | RR – Referee report | ED – Editor decision | EF – Editorial file upload
AR by Anne Thompson on behalf of the Authors (21 Jul 2025)  Author's response   Author's tracked changes   Manuscript 
ED: Publish as is (06 Aug 2025) by Eduardo Landulfo
AR by Anne Thompson on behalf of the Authors (20 Aug 2025)  Manuscript 

Post-review adjustments

AA – Author's adjustment | EA – Editor approval
AA by Anne Thompson on behalf of the Authors (28 Oct 2025)   Author's adjustment   Manuscript
EA: Adjustments approved (07 Nov 2025) by Eduardo Landulfo
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Short summary
Ozone profile trends from SHADOZ sondes and IAGOS aircraft show that ozone in the tropical free troposphere (FT) is not growing fast except over equatorial SE Asia. This agrees with HEGIFTOM (Van Malderen et al., 2025), Stauffer et al. (2024) and Gaudel et al. (2024) TOAR-II papers. Other findings are as follows: (1) our trends are independent of method (QR, MLR) and (2) sample number (SN) (i.e., SHADOZ sampling is sufficient), and (3) all ground-based trends constitute the gold standard for satellite-derived trends.
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