Satellite nadir-viewing geometry affects the magnitude and detectability of long-term trends in stratospheric ozone

Rivoire, Louis; Linz, Marianna; Neu, Jessica L.; Lin, Pu; Santee, Michelle L.

doi:https://doi.org/10.5194/acp-25-2269-2025

Articles | Volume 25, issue 4

https://doi.org/10.5194/acp-25-2269-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-25-2269-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 25, issue 4

Research article

|

20 Feb 2025

Research article |

| 20 Feb 2025

Satellite nadir-viewing geometry affects the magnitude and detectability of long-term trends in stratospheric ozone

Louis Rivoire, Marianna Linz, Jessica L. Neu, Pu Lin, and Michelle L. Santee

Data sets

NASA Goddard Space Flight Center SBUV Merged Ozone Data Set (MOD) https://acd-ext.gsfc.nasa.gov/Data_services/merged/

NOAA-GFDL GFDL-ESM4 model output prepared for CMIP6 CMIP piControl J. P. Krasting et al. https://doi.org/10.22033/ESGF/CMIP6.8669

The IGAC/SPARC Chemistry-Climate Model Initiative Phase-1 (CCMI-1) model data output M. I. Hegglin et al. http://catalogue.ceda.ac.uk/uuid/9cc6b94df0f4469d8066d69b5df879d5/

NOAA-GFDL GFDL-ESM4 model output prepared for CMIP6 CMIP historical, Version 20210526 J. P. Krasting et al. https://doi.org/10.22033/ESGF/CMIP6.8597

Short summary

The recovery of the ozone hole since the 1987 Montreal Protocol has been observed in some regions but has yet to be seen globally. We ask how long it will take to witness a global recovery. Using a technique akin to flying a virtual satellite in a climate model, we find that the degree of confidence we place in the answer to this question is dramatically affected by errors in satellite observations.