Abstract
The article presents the results of long-term field studies of methane in the upper part of permafrost for the different geomorphological levels of Central Yakutia. Patterns of spatial distribution of methane content across different landscapes were found. The highest concentrations of methane are found in alas deposits, the major role of methane in the conservation there goes to the moment of freezing the thermokarst lake draining. The difference in methane content in the sediments of the Late Pleistocene Ice Complex on the left and the right bank of the river Lena was identified. That is likely caused by the conditions of ice complex formation.
Highlights
The article presents the results of long-term field studies of methane in the upper part of permafrost for the different geomorphological levels of Central Yakutia
The highest concentrations of methane are found in alas deposits, the major role of methane in the conservation there goes to the moment of freezing the thermokarst lake draining
That is likely caused by the conditions of ice complex formation
Summary
Представлены результаты многолетних полевых исследований содержания метана в верхней части многолетнемерзлых пород для различных геоморфологических уровней Центральной Якутии. Для межаласных участков выявлена разница в содержании метана в отложениях позднеплейстоценового ледового комплекса на левом и правом берегах р. Содержание метана отличается большой изменчивостью по глубине и в плане в рассмотренных отложениях, при этом после промерзания не наблюдается его перераспеределение, что позволяет использовать метан как палеоиндикатор условий накопления и промерзания отложений.
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