Interpretation of high mixing ratios of O3 observed in the upper troposphere over Syowa Station, Antarctica using a trajectory analysis

Shohei Murayama, Koji Yamazaki, Takakiyo Nakazawa, Shuji Aoki

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7 Citations (Scopus)

Abstract

High O3 mixing ratios were observed above 6 km over Syowa Station (SYO), Antarctica in mid-September 1989 when the tropopause was found to be higher than 10 km. From the results of a 3-dimensional trajectory analysis, it is suggested that the observed high O3 was caused by vertical transport of O3 from the lower stratosphere to the upper troposphere. To examine general features of the transport process associated with high O3 mixing ratios observed in the upper troposphere over SYO, the same trajectory analysis was further performed for high O3 observations at 350 hPa over SYO in 1987-1994. The results imply that the transport of stratospheric air descending in the polar region to SYO plays a very important role in the increase of upper tropospheric O3 over SYO, especially in spring and autumn, while the downward transport of stratospheric O3 in the circumpolar region is important in summer.

Original languageEnglish
Pages (from-to)1177-1180
Number of pages4
JournalGeophysical Research Letters
Volume25
Issue number8
DOIs
Publication statusPublished - 1998 Apr 15

ASJC Scopus subject areas

  • Geophysics
  • Earth and Planetary Sciences(all)

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