Assesment of CO2 Fluxes in the Dry Grassland of Southern Western Siberia

Андрей Александрович Бондарович,Данил Викторович Ильясов,Александр Александрович Каверин,Даниил Васильевич Кириллов,Анатолий Алексеевич Лагутин,Егор Юрьевич Мордвин,Артемий Игоревич Ревякин,Алена Алексеевна Шибанова,Татьяна Михайловна Копытина

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Assesment of CO2 Fluxes in the Dry Grassland of Southern Western Siberia

А. А. Бондарович,

Д. В. Ильясов,

А. А. Каверин,

Д. В. Кириллов,

А. А. Лагутин,

Е. Ю. Мордвин,

А. И. Ревякин,

А. А. Шибанова,

Т. М. Копытина

2025-12-16

https://doi.org/10.24108/preprints-3114107

For the first time, net ecosystem exchange (NEE) and ecosystem respiration (Reco) were measured using the chamber method within the dry grassland (true steppe) of the Kulunda Plain, West Siberia, (Altai Krai), and gross primary production (GPP) was calculated. To identify the relationship between CO2 fluxes and environmental factors, the following parameters were also measured: aboveground phytomass (AGP), photosynthetically active radiation (PAR), air temperature, soil temperature and soil moisture. The median (1Q, 3Q) NEE, Reco, and GPP were -103 (-152, -66), 90 (74, 105), and -200 (-251, -151) mg C m-2 h-1, respectively. The key factors of variability in NEE and GPP were aboveground phytomass, while for Reco – soil moisture content in the 100 cm layer. Based on the obtained data, a neural network was successfully trained using the Levenberg-Marquardt algorithm (R2train = 0.9, R2valid= 0.9, R2test = 0.8; MSEtrain = 335, MSEvalid = 647, MSEtest = 360; Ntrain = 50; Ntrain = 11), which will be used in the future to scale carbon fluxes in space and time.

Ссылка для цитирования:

Бондарович А. А., Ильясов Д. В., Каверин А. А., Кириллов Д. В., Лагутин А. А., Мордвин Е. Ю., Ревякин А. И., Шибанова А. А., Копытина Т. М. 2025. Assesment of CO2 Fluxes in the Dry Grassland of Southern Western Siberia. PREPRINTS.RU. https://doi.org/10.24108/preprints-3114107

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