For better understanding of variations of the strato spheric trace gases over northern mid-latitudes, air sampling with subsequent laboratory analysis has been continued over Japan since 1985. The collection of air samples was made once every year, using a balloon-borne cryogenic sampling system. In this paper, we will report variations of CO_2,CH_4,δ^<13>C, δ^<18>O, ⊿^<14>C, CFC-11,CFC-l2,CFC-113,CFC-114,CFC-22,CH_3CCI_3,CCI_4 and CH_3CI from the results obtained so far.
日本上空における成層圏微量気体の変動
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