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THE RESULTS OF 5- YEAR EXPERIMENT OF METHANE PRODUCTION FROM FROZEN SOILS
Session: Laboratory and Insitu Testing in Cold Regions / Essais en laboratoires et essais in situ pour les régions nordiques
Maria Cherbunina, MSU (Russia)
Anatoli Brouchkov , Lomonosov Moscow State University (Russia)
Elina Karnysheva, Lomonosov Moscow State University (Russia)
Masami Fukuda , Fukuyama City University (Japan)
Valeri Galchenko, Winogradsky Institute of Microbiology (Russia)
The question of origin of the methane and activity of methanogenes at low temperatures remains unclear. Methane production was observed at low temperatures in the laboratory during a long-term experiment. Samples of frozen soils were taken from Yakutsk (Russia), Fairbanks (USA) and Tomakomai (Japan) and incubated at - 5°C in order to study possible methane production. The soil was incubated in glass flasks for 4,5 years under anaerobic conditions. The measurement of methane content in the air of the flasks was conducted at various intervals-from week to a month. During the experiment some samples were thawed and frozen again. We almost did not observed methane .emission from the Yakutsk samples. The emission from the Alaskan and Tomakomai samples was slow. However, methane concentration in the air of flasks was significantly increased at thawing.
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