Journal cover Journal topic
Atmospheric Chemistry and Physics An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

Journal metrics

  • IF value: 5.668 IF 5.668
  • IF 5-year value: 6.201 IF 5-year
    6.201
  • CiteScore value: 6.13 CiteScore
    6.13
  • SNIP value: 1.633 SNIP 1.633
  • IPP value: 5.91 IPP 5.91
  • SJR value: 2.938 SJR 2.938
  • Scimago H <br class='hide-on-tablet hide-on-mobile'>index value: 174 Scimago H
    index 174
  • h5-index value: 87 h5-index 87
Discussion papers
https://doi.org/10.5194/acp-2019-508
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-2019-508
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 14 Jun 2019

Research article | 14 Jun 2019

Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Atmospheric Chemistry and Physics (ACP).

On the impact of future climate change on tropopause folds and tropospheric ozone

Dimitris Akritidis1, Andrea Pozzer2, and Prodromos Zanis1 Dimitris Akritidis et al.
  • 1Department of Meteorology and Climatology, School of Geology, Aristotle University of Thessaloniki, Thessaloniki, Greece
  • 2Max Planck Institute for Chemistry, Mainz, Germany

Abstract. Using a transient simulation for the period 1960–2100 with the state-of-the-art ECHAM5/MESSy Atmospheric Chemistry (EMAC) global model and a tropopause fold identification algorithm, we explore the future projected changes in tropopause folds, Stratosphere-to-Troposphere Transport (STT) of ozone and tropospheric ozone under the RCP6.0 scenario. Statistically significant changes in tropopause fold frequencies are identified in both Hemispheres, occasionally exceeding 3 %, which are associated with the projected changes in the position and intensity of the subtropical jet streams. A strengthening of ozone STT is projected for future at both Hemispheres, with an induced increase of transported stratospheric ozone tracer throughout the whole troposphere, reaching up to 10 nmol/mol in the upper troposphere, 8 nmol/mol in the middle troposphere and 3 nmol/mol near the surface. Notably, the regions exhibiting the maxima changes of ozone STT at 400 hPa, coincide with that of the highest fold frequencies, highlighting the role of tropopause folding mechanism in STT process under a changing climate. For both the eastern Mediterranean and Middle East (EMME), and the Afghanistan (AFG) regions, which are known as hotspots of fold activity and ozone STT during the summer period, the year-to-year variability of middle tropospheric ozone with stratospheric origin is largely explained by the short-term variations of ozone at 150 hPa and tropopause folds frequency. Finally, ozone in the lower troposphere is projected to decrease under the RCP6.0 scenario during MAM (March, April and May) and JJA (June, July and August) at the Northern Hemisphere, and during DJF (December, January and February) at the Southern Hemisphere, due to the decline of ozone precursors emissions, while in the rest of the troposphere ozone shows a remarkable increase owing to the STT strengthening.

Dimitris Akritidis et al.
Interactive discussion
Status: open (until 09 Aug 2019)
Status: open (until 09 Aug 2019)
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
[Subscribe to comment alert] Printer-friendly Version - Printer-friendly version Supplement - Supplement
Dimitris Akritidis et al.
Dimitris Akritidis et al.
Viewed  
Total article views: 323 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
237 84 2 323 1 1
  • HTML: 237
  • PDF: 84
  • XML: 2
  • Total: 323
  • BibTeX: 1
  • EndNote: 1
Views and downloads (calculated since 14 Jun 2019)
Cumulative views and downloads (calculated since 14 Jun 2019)
Viewed (geographical distribution)  
Total article views: 244 (including HTML, PDF, and XML) Thereof 242 with geography defined and 2 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Cited  
Saved  
No saved metrics found.
Discussed  
No discussed metrics found.
Latest update: 19 Jul 2019
Publications Copernicus
Download
Short summary
We investigate the impact of future climate change under the RCP6.0 scenario on tropopause folds and tropospheric ozone, using a transient EMAC simulation and a tropopause fold detection algorithm. A strengthening of ozone Stratosphere-to-Troposphere Transport (STT) is projected for the future, resulting in an increase of upper and middle tropospheric ozone. The maxima of future ozone STT increases are projected over the regions where tropopause folds are expected to occur more frequently.
We investigate the impact of future climate change under the RCP6.0 scenario on tropopause folds...
Citation