sergeogrИзвестия Российской академии наук. Серия географическаяIzvestiya Rossiiskoi Akademii Nauk. Seriya Geograficheskaya2587-55662658-697510.31857/S2587556625020118sergeogr-2944Research ArticleРЕГИОНАЛЬНЫЕ ГЕОГРАФИЧЕСКИЕ ПРОБЛЕМЫREGIONAL GEOGRAPHICAL PROBLEMSПространственно-временная изменчивость эмиссии метана в олиготрофных грядово-мочажинных комплексах Западной СибириSpatial and Temporal Variability of Methane Emissions in the Oligotrophic Ridge-Hollow Complex of Western SiberiaВеретенниковаЕ. Э.VeretennikovaE. E.

Томск

Tomsk

lena2701@yandex.ruДюкаревЕ. А.DyukarevE. A.

Томск

Ханты-Мансийск

Tomsk

Khanty-Mansiysk

Институт мониторинга климатических и экологических систем СО РАН; Сибирский государственный медицинский университетРоссияInstitute for Monitoring of Climatic and Ecological Systems SB RAS; Siberian State Medical UniversityRussian FederationИнститут мониторинга климатических и экологических систем СО РАН; Югорский государственный университетРоссияInstitute for Monitoring of Climatic and Ecological Systems SB RAS; Yugra State UniversityRussian Federation202506112025892297312Copyright © Веретенникова Е.Э., Дюкарев Е.А., 20252025Веретенникова Е.Э., Дюкарев Е.А.Veretennikova E.E., Dyukarev E.A.This work is licensed under a Creative Commons Attribution 4.0 License.https://izvestia.igras.ru/jour/article/view/2944

В течение трех лет при помощи статического камерного метода была изучена эмиссия метана с поверхности одного из самых распространенных типов болотных ландшафтов таежной зоны Западной Сибири — грядово-мочажинного комплекса (ГМК). Обнаружена значительная пространственная изменчивость потоков СН4 между элементами ГМК — грядой и мочажиной (от 60 до 74% в июле и от 20 до 50% в сентябре). Временная изменчивость играет не менее важную роль и является откликом на изменение температуры торфяных залежей. На мочажине обнаружена изменчивость суточного цикла метана, которая на 34–64% объясняется изменчивостью температуры торфяной залежи на глубине от 2 до 15 см. На гряде ГМК суточного цикла не обнаружено, однако изменчивость потоков метана в течение летне-осеннего периода на 46% объясняется температурой на глубине 30 и 40 см. В работе обсуждаются возможные причины пространственно-временной изменчивости СН4 с поверхности элементов ГМК. Результаты пространственно-временного анализа показали, что не дифференцированный разовый отбор пробы и последующая экстраполяция этого результата на сутки и сезон может дать завышенную оценку, если не учитывать влияние текущей температуры, а также положения в микрорельефе и характера растительности, что в конечном итоге может привести как к переоценке, так и к недооценке эмиссии СН4 .

In the summer-autumn seasons (during for three years) using the static chamber method the СН4 emission from the surface of one of the most common types of bog ecosystems in the taiga zone of Western Siberia—the ridge-hollow complex (RHC) was studied. A very significant spatial variability of CH4 fluxes (from 60 to 74% in July and from 20 to 50% in September) was observed between the elements of the RHC: ridge and hollow. The temporal variability plays an equally important role and is a response to changes in the temperature of the peat deposits. At the hollow, a diurnal cycle of CH4 was detected, which which is explained 34–64% by the variability of the peat deposit temperature at a depth of 2 to 15 cm. At the ridge, no diurnal cycle was found on the however, CH4 fluxes during the summer-autumn period are 46% explained by the temperature at depths of 30 and 40 cm. The paper also discusses possible reasons for the spatial and temporal variability of CH4 fluxes from the surface of the RHC.

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The authors declare that there are no conflicts of interest present.