Yasuhiro Sadanaga , Mitsuyo Sengen, Norimichi Takenaka, Hiroshi Bandow

  • Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan

Received: July 21, 2011
Revised: December 15, 2011
Accepted: December 15, 2011
Download Citation: ||https://doi.org/10.4209/aaqr.2011.07.0102  

  • Download: PDF


Cite this article:
Sadanaga, Y., Sengen, M., Takenaka, N. and Bandow, H. (2012). Analyses of the Ozone Weekend Effect in Tokyo, Japan: Regime of Oxidant (O3 + NO2) Production. Aerosol Air Qual. Res. 12: 161-168. https://doi.org/10.4209/aaqr.2011.07.0102


 

ABSTRACT


The ozone weekend effect (OWE) in Tokyo, the capital of Japan, was analyzed from April 2005 to March 2008 with respect to the photochemical ozone production, focusing on the ozone production regime. For most periods, the OWE was confirmed in the wintertime as well as in the summertime. The comparison of Ox ([Ox] = [O3] + [NO2] – 0.1[NOx]) concentrations between weekdays and weekends suggests that there are some periods when the photochemical ozone production on the weekends could be larger than on the weekdays (defined as the POP group). We compared NOx (the sum of NO and NO2) and Ox concentrations on the weekends with those on the weekdays for several distinct ranges of the non-methane hydrocarbons (NMHCs) concentrations, and NOx and Ox concentrations on the weekends are significantly lower and higher than those on the weekdays in the POP group. Therefore, the ozone production regime would be NMHC-limited in the POP group. The ozone production regime in the summertime in Tokyo could be in the boundary area between NMHC- and NOx-limited in terms of the NMHCs/NOx ratios. The NMHCs/NOx ratios in the NMHC-limited regime are smaller than those in the NOx-limited regime in general. However, the NMHCs/NOx ratios in the POP group were not smaller than those in the non-POP group.


Keywords: Ozone weekend effect; Ozone production regime; Nitrogen oxides; Non-methane hydrocarbons


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.

7.3
2022CiteScore
 
 
77st percentile
Powered by
Scopus
 
   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.