A field study of photochemical smog formation under stagnant meteorological conditions

Shinji Wakamatsu, Itsushi Uno, Makoto Suzuki

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


Photochemical air pollution episodes during 15-20 July 1981, covering the Tokyo Metropolitan Area under the stagnant meteorological conditions, were analyzed. Three-dimensional (3-D) pollutant and meteorological observations showed that polluted air masses followed sea and land breeze circulation patterns. Aged secondary pollutants were detected aloft from midnight until early morning. These pollutants subsequently entrained into the daytime mixed layer and affected O3 formation. To understand this stagnating system, a simple trajectory model was used. Simulated results showed good qualitative agreement with observations, but the model overestimated the surface concentration and underestimated the aircraft observations. This was mainly caused by the assumption of vertical uniformity within the model.

Original languageEnglish
Pages (from-to)1037-1050
Number of pages14
JournalAtmospheric Environment Part A, General Topics
Issue number5
Publication statusPublished - 1990
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Pollution


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