Articles | Volume 3, issue 3
Research article
 | Highlight paper
21 Jul 2022
Research article | Highlight paper |  | 21 Jul 2022

Trends in the tropospheric general circulation from 1979 to 2022

Adrian J. Simmons


Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • AC1: 'Comment on wcd-2022-19', Adrian Simmons, 08 Apr 2022
  • RC1: 'Comment on wcd-2022-19', Theodore Shepherd, 02 May 2022
    • AC2: 'Reply on RC1', Adrian Simmons, 08 May 2022
      • RC3: 'Reply on AC2', Theodore Shepherd, 16 May 2022
        • AC3: 'Reply on RC3', Adrian Simmons, 16 May 2022
  • CC1: 'Comment on wcd-2022-19 by Gloria Manney & Michaela Hegglin', Gloria Manney, 13 May 2022
    • AC5: 'Reply on CC1', Adrian Simmons, 21 May 2022
  • RC2: 'Comment on wcd-2022-19', Anonymous Referee #2, 14 May 2022
    • AC4: 'Reply on RC2', Adrian Simmons, 20 May 2022

Peer review completion

AR: Author's response | RR: Referee report | ED: Editor decision
AR by Adrian Simmons on behalf of the Authors (23 May 2022)  Author's response
ED: Referee Nomination & Report Request started (02 Jun 2022) by Sebastian Schemm
RR by Anonymous Referee #2 (12 Jun 2022)
RR by Anonymous Referee #1 (29 Jun 2022)
ED: Publish subject to technical corrections (29 Jun 2022) by Sebastian Schemm
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.
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.