Upper-stratospheric temperature trends: new results from the Optical Spectrograph and InfraRed Imager System (OSIRIS)

Dubé, Kimberlee; Tegtmeier, Susann; Bourassa, Adam; Zawada, Daniel; Degenstein, Douglas; Randel, William; Davis, Sean; Schwartz, Michael; Livesey, Nathaniel; Smith, Anne

doi:https://doi.org/10.5194/acp-24-12925-2024

Articles | Volume 24, issue 22

https://doi.org/10.5194/acp-24-12925-2024

© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-24-12925-2024

© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 24, issue 22

Research article

|

21 Nov 2024

Research article |

| 21 Nov 2024

Upper-stratospheric temperature trends: new results from the Optical Spectrograph and InfraRed Imager System (OSIRIS)

Kimberlee Dubé, Susann Tegtmeier, Adam Bourassa, Daniel Zawada, Douglas Degenstein, William Randel, Sean Davis, Michael Schwartz, Nathaniel Livesey, and Anne Smith

Data sets

nst3_3d_asm_Nv: MERRA-2 3D IAU State, Meteorology Instantaneous 3-hourly Global Modeling and Assimilation Office (GMAO) https://doi.org/10.5067/WWQSXQ8IVFW8

ERA5 hourly data on single levels from 1940 to present Hans Hersbach et al. https://doi.org/10.24381/cds.adbb2d47

JRA-55: Japanese 55-year Re- analysis, Daily 3-Hourly and 6-Hourly Data Japan Meteorological Agency https://doi.org/10.5065/D6HH6H41

Level 2 Temp_O3_H2O SABER Science Team https://data.gats-inc.com/saber/custom/Temp_O3_H2O/v2.0/

MLS/Aura Level 2 Temperature V005 M. Schwartz et al. Schwartz, M., Livesey, N., and Read, W.: MLS/Aura Level 2 Geopotential Height V005, Goddard Earth Sciences Data and Information Services Center (GES DISC) [data set], Green- belt, MD, USA, https://doi.org/10.5067/Aura/MLS/DATA2507, 2020a. Zawada, D., Dubé, K., Warnock, T., Bourassa, A., Tegtmeier, S., and Degenstein, D.: OSIRIS stratospheric temperature, Version 7.3, Zenodo [data set], https://doi.org/10.5281/zenodo.8271140, 2023. https://doi.org/10.5067/Aura/MLS/DATA2520

MLS/Aura Level 2 Geopotential Height V005 M. Schwartz et al. https://doi.org/10.5067/Aura/MLS/DATA2507

OSIRIS stratospheric temperature Daniel Zawada et al. https://doi.org/10.5281/zenodo.8271140

Model code and software

LOTUS Regression Code, SPARC LOTUS Activity Robert Damadeo et al. https://github.com/usask-arg/lotus-regression

Short summary

Greenhouse gas emissions that warm the troposphere also result in stratospheric cooling. The cooling rate is difficult to quantify above 35 km due to a deficit of long-term observational data with high vertical resolution in this region. We use satellite observations from several instruments, including a new temperature product from OSIRIS, to show that the upper stratosphere, from 35–60 km, cooled by 0.5 to 1 K per decade over 2005–2021 and by 0.6 K per decade over 1979–2021.