Measurements of atmospheric methane at the Japanese Antarctic Station, Syowa

S. Aoki, T. Nakazawa, S. Murayama, S. Kawaguchi

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45 Citations (Scopus)


The diurnal CH4 variation was hardly observable throughout the year. The average seasonal CH4 variation showed minimum and maximum concentrations in early March and late September, respectively, and a peak-to-peak amplitude of 30 ppbv. Annual mean values of the CH4 concentration were 1640 and 1651 ppbv in 1988 and 1989, respectively. A concentration difference of 11 ppbv between the two years may suggest that recent annual increase rate of the CH4 concentration is smaller than previously reported values of about 1% year-1. -from Authors

Original languageEnglish
Pages (from-to)273-281
Number of pages9
JournalTellus, Series B
Volume44 B
Issue number4
Publication statusPublished - 1992 Jan 1
Externally publishedYes

ASJC Scopus subject areas

  • Atmospheric Science


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