AIRCRAFT MEASUREMENTS OF ATMOSPHERIC CO_2 CONCENTRATION OVER THE ANTARCTIC REGION

元データ 国立極地研究所

概要

Aircraft measurements of the atmospheric CO_2 concentration over Syowa Station (69°00'S, 39°35'E), Antarctica have been continued since January 1983,except in 1985 and 1988. Since the data obtained so far are still insufficient and the measurements were not made in all seasons of all years, there is some uncertainty in the results. Nevertheless, preliminary inspection of the data shows that : (1) the maximum and minimum concentrations of the average seasonal CO_2 cycle in the lower and middle troposphere appear early in October and in mid-April, respectively; (2) in the upper troposphere, the maximum and minimum occur late in September and early in May, respectively; (3) the peak-to-peak amplitude of the seasonal cycle decreases slightly with height except near the ground surface; (4) the CO_2 concentration increases gradually with height the year and the height-dependent difference of the concentration is smaller in austral winter and spring than in remaining seasons of the year. From comparison with the results of ground-fixed measurements at the South Pole and Cape Grim, Tasmania and other aircraft measurements, it is suggested that the northern hemispheric air with high CO_2 concentration is transported to the Antarctic region through the upper troposphere from austral winter to spring, while air with low CO_2 concentration is transported from southern middle latitudes into the Antarctic region through the lower troposphere in remaining seasons.

著者

張 紀久夫 阪大基:福井工大工
Yamanouchi Takashi National Institute of Polar Research
Takata Morimasa National Institute Of Polar Research
Kawaguchi Sadao Nagaoka National College Of Technology
Shiobara Masataka National Institute For Polar Research
Shiobara Masataka Meteorological Research Institute
Morimoto S National Institute Of Polar Research Organization Of Information And Systems
Shimohara Kimiko Kitami Institute of Technology
Nakazawa Takakiyo Center for Atmospheric and Oceanic Studies, Tohoku University
Nakazawa Takakiyo Center For Atmospheric And Oceanic Studies Graduate School Of Science Tohoku University
Aoki Shuji Center For Atmospheric And Oceanic Studies Graduate School Of Science Tohoku University
KAWAGUCHI Sadao National Institute of Polar Research
TANAKA Masayuki Center for Atmospheric and Oceanic Studies, Faculty of Science, Tohoku University
AOKI Shuhji National Institute of Polar Research
MAKINO Yukio Meteorological Research Institute
FUKABORI Masashi Meteorological Research Institute
MURAYAMA Shohei Center for Atmospheric and Oceanic Studies, Faculty of Science, Tohoku University
Yamanouchi Takashi National Institute For Polar Research
Morimoto S National Inst. Polar Res. Tokyo Jpn
Aoki Shuhji Faculty Of Science Tohoku University
Tanaka Masayuki Center For Atmospheric And Oceanic Studies Faculty Of Science Tohoku University
Mae Shinji Department Of Applied Physics Hokkaido University
Makino Yukio Hakodate Marine Observatory, Japan Meteorological Agency
Nakazawa Takakiyo Center For Atmospheric And Oceanic Studies Graduate School Of Sci. Tohoku Univ.
Nakazawa Takakiyo Center For Atmospheric And Oceanic Studies Faculty Of Science
Murayama Shohei Center For Atmospheric And Oceanic Studies Tohoku University
Shiobara M Meteorological Res. Inst. Tsukuba Jpn
Fukabori M Meteorological Res. Inst. Ibaraki Jpn
Shinbori K Hokkaido Univ. Sapporo
Yamada T Geosystems Inc.
Kawaguchi Sadao Nagoya University
Yamanouchi Takashi National Inst. Of Polar Res. And Dep. Of Polar Sci. The Graduate Univ. For Advanced Studies 10-3 Mid
Yamanouchi Takashi National Institute Of Polar Research 10-3 Midoricho Tachikawa Tokyo Japan.
Mae Shinji National Institute For Resources And Environment
Shinbori K Nagaoka National College Of Technology
Yamada Tomomi Geosystems Inc.

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