Boris B. Chen1, Sanjar A. Imashev 1, Leonid G. Sverdlik1, Paul A. Solomon2, Jeffrey Lantz3, James J. Schauer4, Martin M. Shafer4, Maria S. Artamonova5, Greg R. Carmichael6

  • 1 Kyrgyz-Russian Slavic University, 44 Kievskaya Str., Bishkek 720000, Kyrgyz Republic
  • 2 U.S. Environmental Protection Agency, Office of Research & Development, Las Vegas, NV 89119, USA
  • 3 U.S. Environmental Protection Agency, Office of Radiation and Indoor Air, Las Vegas, NV 89119, USA
  • 4 University of Wisconsin, Wisconsin State Laboratory of Hygiene, Madison, WI 53706, USA
  • 5 Institute of Atmospheric Physics, 109017 Moscow, Russia
  • 6 University of Iowa, Department of Chemical & Biochemical Engineering, Iowa City, IA 5224, USA

Received: June 22, 2012
Revised: November 30, 2012
Accepted: November 30, 2012
Download Citation: ||  

Cite this article:
Chen, B.B., Imashev, S.A., Sverdlik, L.G., Solomon, P.A., Lantz, J., Schauer, J.J., Shafer, M.M., Artamonova, M.S. and Carmichael, G.R. (2013). Ozone Variations over Central Tien-Shan in Central Asia and Implications for Regional Emissions Reduction Strategies. Aerosol Air Qual. Res. 13: 555-562.



The variability of total column ozone (TCO) and tropospheric column ozone (TrCO) was examined in Central Asia. Measurements were conducted at the Lidar Station Teplokluchenka in eastern Kyrgyzstan for one year, July 2008–July 2009.     TCO was obtained using a handheld Microtops II Ozonometer (TCO-MII) and from the Aura OMI (TCO-OMI) satellite. Nitrogen dioxide (NO2) and formaldehyde concentrations also were obtained from the OMI satellite. Formaldehyde was used as a surrogate for volatile organic compounds. TrCO was estimated by the difference between TCO-OMI and stratospheric column ozone retrieved from the MLS satellite. Comparison of the ground-based TCO-MII with TCO-OMI showed good agreement (r2 = 0.93), and linear regression between these was used to estimate missing values in the TCO-MII dataset.

The contribution of TrCO to TCO varied from 15% in summertime to 5% in winter. High values of TrCO were observed during summer (July: 45 DU) and low values during winter (December: 15 DU), as is typically observed. The average values of TrCO for summer, autumn, winter, and spring were equal to 42, 27, 20, and 30 DU, respectively. Seasonal variability of TrCO corresponded to solar intensity, indicating that TrCO is likely to form through photochemical means rather than stratospheric intrusion.

The spatial distribution of NO2 and VOC were examined to better understand the regional sources of these ozone precursors. Transport from highly populated areas of the Ferghana Valley and Tashkent in Uzbekistan contributed to the TrCO concentrations observed in this work. The HCHO/NO2 ratio, an indicator of the ozone production rate, suggested that reducing NO2 would be more effective in reducing TrCO during most of the year, except summer, when reductions of both would likely be needed.

Keywords: Tropospheric ozone; Total column ozone; OMI Satellite; HCHO/NO2; NOx versus VOC limited

Share this article with your colleagues 


Subscribe to our Newsletter 

Aerosol and Air Quality Research has published over 2,000 peer-reviewed articles. Enter your email address to receive latest updates and research articles to your inbox every second week.

77st percentile
Powered by
   SCImago Journal & Country Rank

2022 Impact Factor: 4.0
5-Year Impact Factor: 3.4

Aerosol and Air Quality Research partners with Publons

CLOCKSS system has permission to ingest, preserve, and serve this Archival Unit
CLOCKSS system has permission to ingest, preserve, and serve this Archival Unit

Aerosol and Air Quality Research (AAQR) is an independently-run non-profit journal that promotes submissions of high-quality research and strives to be one of the leading aerosol and air quality open-access journals in the world. We use cookies on this website to personalize content to improve your user experience and analyze our traffic. By using this site you agree to its use of cookies.