Dynamical linear modeling estimates of long-term ozone trends from homogenized Dobson Umkehr profiles at Arosa/Davos, Switzerland

Maillard Barras, Eliane; Haefele, Alexander; Stübi, René; Jouberton, Achille; Schill, Herbert; Petropavlovskikh, Irina; Miyagawa, Koji; Stanek, Martin; Froidevaux, Lucien

doi:https://doi.org/10.5194/acp-22-14283-2022

Articles | Volume 22, issue 21

https://doi.org/10.5194/acp-22-14283-2022

© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

Atmospheric ozone and related species in the early 2020s:...

https://doi.org/10.5194/acp-22-14283-2022

© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 22, issue 21

Research article

|

08 Nov 2022

Research article |

| 08 Nov 2022

Dynamical linear modeling estimates of long-term ozone trends from homogenized Dobson Umkehr profiles at Arosa/Davos, Switzerland

Eliane Maillard Barras, Alexander Haefele, René Stübi, Achille Jouberton, Herbert Schill, Irina Petropavlovskikh, Koji Miyagawa, Martin Stanek, and Lucien Froidevaux

Data sets

NOAA Dobson Umkehr Operational, StrayLight, and Optimized Ozone Profile Data, Monthly Averages I. Petropavlovskikh and K. Miyagawa https://gml.noaa. gov/aftp/data/ozwv/Dobson/AC4/Umkehr/Monthly/

data sets of "Dynamic Linear Modeling estimates of long-term ozone trends from homogenized Dobson Umkehr profiles at Arosa, Switzerland" Eliane Maillard Barras /10.5281/zenodo.7185409

MLS/Aura Level 2 Ozone (O3) Mixing Ratio V004 M. Schwartz, L. Froidevaux, N. Livesey, and W. Read https://doi.org/10.5067/Aura/MLS/DATA2017

Short summary

Intercomparisons of three Dobson and three Brewer spectrophotometers at Arosa/Davos, Switzerland, are used for the homogenization of the longest Umkehr ozone profiles time series worldwide. Dynamic linear modeling (DLM) reveals a significant positive trend after 2004 in the upper stratosphere, a persistent negative trend between 25 and 30 km in the middle stratosphere, and a negative trend at 20 km in the lower stratosphere, with different levels of significance depending on the dataset.