Articles | Volume 3, issue 3
https://doi.org/10.5194/wcd-3-777-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/wcd-3-777-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| Highlight paper
| 
21 Jul 2022
Research article | Highlight paper |
| 21 Jul 2022
| 21 Jul 2022
Trends in the tropospheric general circulation from 1979 to 2022
Adrian J. Simmons
CORRESPONDING AUTHOR
Copernicus Department, European Centre for Medium-Range Weather Forecasts, Shinfield Park, Reading RG2 9AX, UK
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Latest update: 24 Jul 2025
Executive editor
Analysing and understanding potential trends in the atmospheric circulation over the last decades is an important aspect of atmospheric dynamics. In this article, Adrian Simmons performed a very thorough global trend analysis, with a focus on near-tropopause winds, based on ERA5 reanalyses. The paper provides an excellent overview and emphasises important regional and seasonal differences. It is shown that despite Arctic amplification, the upper-level westerlies mainly strengthened at northern middle latitudes. Focusing on jet-stream wind maxima, it is found that they increased over the North Atlantic. These results and the detailed global trend overview will be useful for the community to further investigate the underlying physical processes that led to these trends in the last decades.
Analysing and understanding potential trends in the atmospheric circulation over the last...
Short summary
This study of changes in temperature and wind since 1979 met its twin aims of (i) increasing confidence in some findings of the latest IPCC assessment and (ii) identifying changes that had received little or no previous attention. It reports a small overall intensification and shift in position of the North Atlantic jet stream and associated storms, and a strengthening of tropical upper-level easterlies. Increases in low-level winds over tropical and southern hemispheric oceans are confirmed.
This study of changes in temperature and wind since 1979 met its twin aims of (i) increasing...
