Vol. 39, issue 07, article # 11

Abstract:

The development of domestic greenhouse gas monitoring solutions is crucial for Russia, addressing needs in both import substitution and assessment of the carbon balance of its vast wetland ecosystems. This paper presents the Russian automated chamber system KASM-8 for long-term high-frequency measurement of carbon dioxide (CO₂) and methane (CH₄) fluxes. The design features of the system are described, as well as measurement and data processing technique, which includes automated outlier filtering and error estimation. Field testing was conducted in 2023–2024 at the “Mukhrino" carbon supersite (Khanty-Mansi Autonomous Okrug–Yugra) and the “Vasyuganye" research station (Tomsk Oblast) in ridge-hollow complexes of ombrotrophic bogs. The resulted data series (192 measurements per day) revealed fundamental differences in carbon exchange between microlandscape elements: in KhMAO–Yugra, hollows acted as a net CO₂ sink (mean NEE ranged from -0.19 to -0.28 μmol × m^-2 × s^-1), whereas ridges were a net source (mean NEE was 0.17 μmol × m^-2 × s^-1). At the “Vasyuganye" station, hollows demonstrated lower CO₂ uptake capacity, and ridges exhibited higher emission fluxes. The data also revealed pronounced daily and seasonal dynamics and interannual variability. The results confirm the operational reliability of the KASM-8 complex and can be used for assessing the carbon balance with allowance for spatial heterogeneity of bog microlandscapes in climate projects and for creating long-term monitoring systems.

Keywords:

greenhouse gases, carbon balance, bog, carbon polygon, ridge-hollow complex, chamber measurements, Mukhrino, Vasyuganye, KASM-8

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References:

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