SEASONAL VARIATION OF TROPOSPHERIC OZONE AND THE IMPACT OF TRANSPORT OVER SYOWA STATION, ANTARCTICA

元データ 国立極地研究所

概要

To interpret the height-dependent seasonal variations of the tropospheric O_3 mixing ratio observed over Syowa Station, Antarctica, atmospheric transport processes were examined using a 3-dimensional trajectory analysis with U. S. National Centers for Environmental Prediction (NCEP) data. Results from the analysis suggest that the seasonal O_3 variations are affected significantly by a combination of the following processes : (1) in the upper troposphere over Syowa, the downward transport of air rich in O_3 from the stratosphere is enhanced, while the transport of air poor in O_3 from lower levels is suppressed from summer to early autumn; (2) in the lower troposphere over Syowa, lower tropospheric air poor in O_3 is transported horizontally from lower latitudes and the transport of air with high O_3 mixing ratios from upper levels is reduced from late spring to early autumn; (3) vertical air mixing is enhanced in the Antarctic troposphere in cold seasons; and (4) in the middle troposphere, the upward transport of lower tropospheric air takes precedence over air transport from upper levels throughout the year except in summer. These transport processes are partly related so some meteorological features at southern high latitudes, such as the circumpolar trough and katabatic circulation.

著者

山崎 孝治 北大院地球環境
張 紀久夫 阪大基:福井工大工
Morimoto S National Institute Of Polar Research Organization Of Information And Systems
Nakazawa Takakiyo Center for Atmospheric and Oceanic Studies, Tohoku University
Aoki Shuhji Center for Atmospheric and Oceanic Studies, Graduate School of Science, Tohoku University
Nakazawa Takakiyo Center For Atmospheric And Oceanic Studies Graduate School Of Science Tohoku University
MURAYAMA Shohei National Institute for Resources and Environment
AOKI Shuhji National Institute of Polar Research
Aoki Shuhji Center For Atmospheric And Oceanic Studies Faculty Of Science Tohoku University
Murayama Shohei National Inst. Of Advanced Industrial Sci. And Technol. (aist)
Morimoto S National Inst. Polar Res. Tokyo Jpn
Aoki S Center For Atmospheric And Oceanic Studies Graduate School Of Science Tohoku University
清水 明 東大教養
Aoki Shuji Center For Atmospheric And Oceanic Studies Graduate School Of Sci. Tohoku Univ.
Aoki Shuhji Faculty Of Science Tohoku University
Aoki Syuji National Institute Of Polar Research
清水 明 東大院総合文化・科技団
Mae S National Institute Of Polar Research Research Organization Of Information And Systems
YAMAZAKI Koji Graduate School of Environmental Earth Science, Hokkaido University
Mae Shinji Department Of Applied Physics Hokkaido University
Nakazawa Takakiyo Center For Atmospheric And Oceanic Studies Faculty Of Science
Murayama Syohei National Institute For Resources And Environment
清水 明 Center For Atmospheric And Oceanic Studies Graduate School Of Science Tohoku University
Mae S Hokkaido Univ. Sapporo
Nakazawa T Center For Atmospheric And Oceanic Studies Faculty Of Science
Yamazaki Koji Graduate School Of Environmental Earth Science Hokkaido University
Mae Shinji National Institute For Resources And Environment

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