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

doi:10.1029/98GL00835

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

Research output: Contribution to journal › Article › peer-review

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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 language	English
Pages (from-to)	1177-1180
Number of pages	4
Journal	Geophysical Research Letters
Volume	25
Issue number	8
DOIs	https://doi.org/10.1029/98GL00835
Publication status	Published - 1998 Apr 15
Externally published	Yes

ASJC Scopus subject areas

Geophysics
Earth and Planetary Sciences(all)

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10.1029/98GL00835

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

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.",

author = "Shohei Murayama and Koji Yamazaki and Takakiyo Nakazawa and Shuji Aoki",

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T1 - Interpretation of high mixing ratios of O3 observed in the upper troposphere over Syowa Station, Antarctica using a trajectory analysis

AU - Murayama, Shohei

AU - Yamazaki, Koji

AU - Nakazawa, Takakiyo

AU - Aoki, Shuji

PY - 1998/4/15

Y1 - 1998/4/15

N2 - 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.

AB - 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.

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

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