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: 5.509 IF 5.509
  • IF 5-year value: 5.689 IF 5-year 5.689
  • CiteScore value: 5.44 CiteScore 5.44
  • SNIP value: 1.519 SNIP 1.519
  • SJR value: 3.032 SJR 3.032
  • IPP value: 5.37 IPP 5.37
  • h5-index value: 86 h5-index 86
  • Scimago H index value: 161 Scimago H index 161
Discussion papers
https://doi.org/10.5194/acp-2018-652
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-2018-652
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 03 Aug 2018

Research article | 03 Aug 2018

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

High tropospheric ozone in Lhasa within the Asian summer monsoon anticyclone 2013: influence of convective transport and stratospheric intrusions

Dan Li1,2, Bärbel Vogel1, Rolf Müller1, Jianchun Bian2,3, Gebhard Günther1, Qian Li2, Jinqiang Zhang2,3, Zhixuan Bai2, Holger Vömel4, and Martin Riese1 Dan Li et al.
  • 1Institute of Energy and Climate Research: Stratosphere (IEK-7), Forschungszentrum Jülich, Jülich, Germany
  • 2Key Laboratory of Middle Atmosphere and Global Environment Observation (LAGEO), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China
  • 3College of Earth Science, University of Chinese Academy of Sciences, Beijing, China
  • 4Earth Observing Laboratory, National Center for Atmospheric Research, Boulder, CO, USA

Abstract. Balloon-borne measurements of ozone in Lhasa (29.66°N, 91.14°E, 3650m above sea level) in August 2013 are investigated using backward trajectory calculations performed with the Chemical Lagrangian Model of the Stratosphere (CLaMS). Measurements show three time periods characterized by high ozone mixing ratios in the troposphere on 8, 11, and 18–20 August 2013 during the Asian summer monsoon season. Here, we could verify two different sources for the enhanced ozone values in the troposphere. First, transport of polluted air from the boundary layer, and second transport from the stratosphere by stratospheric intrusions. Air pollution from South Asia through convective and long-range transport plays a key role in enhancing middle/upper tropospheric ozone mixing ratios up to 90% on 8 August and up to 125% on 11 August 2013. Stratospheric air intruded from the northern high-latitude to the southeastern flank of the Asian summer monsoon (ASM) anticyclone to the troposphere and is identified as source of enhanced ozone according to backward trajectory calculation and satellite measurements by the Ozone Monitoring Instrument (OMI) and the Atmospheric Infrared Sounder (AIRS). Air parcels with high ozone moved from the high latitude lower stratosphere to the middle/upper troposphere and are then transported to Lhasa over a long-distance and enhanced upper middle/tropospheric ozone in Lhasa during 18–20 August 2013. Our findings demonstrate that the strong variability of ozone within the ASM anticyclone in the free troposphere is caused by transport from different regions of the atmosphere.

Dan Li et al.
Interactive discussion
Status: final response (author comments only)
Status: final response (author comments only)
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
[Login for Authors/Co-Editors] [Subscribe to comment alert] Printer-friendly Version - Printer-friendly version Supplement - Supplement
Dan Li et al.
Dan Li et al.
Viewed  
Total article views: 377 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
287 83 7 377 7 7
  • HTML: 287
  • PDF: 83
  • XML: 7
  • Total: 377
  • BibTeX: 7
  • EndNote: 7
Views and downloads (calculated since 03 Aug 2018)
Cumulative views and downloads (calculated since 03 Aug 2018)
Viewed (geographical distribution)  
Total article views: 377 (including HTML, PDF, and XML) Thereof 376 with geography defined and 1 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Cited  
Saved  
No saved metrics found.
Discussed  
No discussed metrics found.
Latest update: 19 Nov 2018
Publications Copernicus
Download
Short summary
Balloon-sonde measurements performed over Lhasa in August 2013 are investigated using CLaMS trajectory calculations. Here, we focus on high ozone mixing ratios in the free troposphere. Our findings demonstrate that both stratospheric intrusions and convective transport of air pollution play a major role in enhancing middle/upper tropospheric ozone.
Balloon-sonde measurements performed over Lhasa in August 2013 are investigated using CLaMS...
Citation
Share