Carbon Fluxes from Soils of “Ladoga” Carbon Monitoring Site Leningrad Region, Russia

For the first time, data on the emission of climate-active gases from soils of different types of use of the south taiga sub-zone were obtained. Soils of the boreal belt are key elements of the global carbon cycle. They determine the sink and emission of climate-active gases. Soils near large cities...

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Bibliographic Details
Published in:Atmosphere
Main Authors: Evgeny Abakumov, Maria Makarova, Nina Paramonova, Viktor Ivakhov, Timur Nizamutdinov, Vyacheslav Polyakov
Format: Article in Journal/Newspaper
Language:English
Published: MDPI AG 2024
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Online Access:https://doi.org/10.3390/atmos15030360
https://doaj.org/article/4eff1b83f8f84b6cafd26520e44d73e3
Description
Summary:For the first time, data on the emission of climate-active gases from soils of different types of use of the south taiga sub-zone were obtained. Soils of the boreal belt are key elements of the global carbon cycle. They determine the sink and emission of climate-active gases. Soils near large cities are a major carbon sink, in the face of climate change, soils from sinks can become a source of carbon and contribute significantly to climate change on the planet. Studies of F CO2 and F CH4 fluxes were carried out on the territory of the monitoring site “Ladoga” located in the southern taiga subzone in soils of land not used in agriculture, former agriculture lands, and wetlands. During the chamber measurements, a portable gas analyzer GLA131-GGA (ABB, Canada) was used. The chamber was placed on the soil, after which the concentration of CO 2 , CH 4 and H 2 O in the mobile chamber was recorded. As a result of the study it was found that the lowest emission of carbon dioxide is characteristic of soils developing on the soils of wetland and is 0.64 gCO 2 /(m 2 *year). Which is associated with a high degree of hydrophobicity of the territory and changes in the redox regime. The highest emission of carbon dioxide is registered in soils on the land not used in agriculture and is 4.16 gCO 2 /(m 2 *year). This is due to the formation of predominantly labile forms of carbon in the soil, which can be relatively rapidly involved in the carbon cycle and affect the active emission of carbon from the soil. According to the data obtained on F CH4 emission from soils, it was found that soils of land not used in agriculture and former agriculture lands were net sinks, while soils of wetlands were characterized by CH 4 source, the emission was from 0.05 to 0.83 gCH 4 /(m 2 *year). The results obtained indicate spatial heterogeneity and changes in the carbon cycle within the monitoring site “Ladoga”, which are due to the change of plant communities and habitat type. Monitoring the release of important greenhouse gases in close ...