Abstract
Abstract A convenient method was developed for detrmination of methane concentration in old air trapped in Antarctic ice core samples. The air was extracted with a stainless steel bellows pump after quick refreezing of melted ice samples and the methane was measured with a gas chromatograph with an FID. The averaged methane concentration in the Mizuho ice core at a depth of 330 m (ca. 3600 BP, 11 samples) was 750±20 ppbv.
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