Modelling of the wetland methane budget to estimate its transport to groundwater

Glagolev, M. V.; Сабреков, А. Ф.; Kotsyurbenko, O. R.; Terentieva, Irina; Litti, Yu. V.

doi:10.1088/1755-1315/1093/1/012017

Cited by 1 publication

(2 citation statements)

References 54 publications

(40 reference statements)

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“…It should be noted that the median values of CH 4 flux from the hollow and the waterlogged hollow (6 and 11 mgCH4 m −2 h −1 , respectively) fall well within the range of methane emissions from hollows reported for Mukhrino earlier [24], although slightly exceed the median values. Also, according to static chamber observations in Mukhrino in August-September 2020 [25], methane emissions in hollows amounted to 3.7 ÷ 5.0 mgCH4 m − 2 h −1 , lower than during our campaign.…”

Section: Ch 4 Emissionscontrasting

confidence: 43%

“…Mukhrino represents a typical landscape of an oligotrophic raised boreal peatland [4]. Earlier studies addressed both CO 2 [20][21][22] and CH 4 [23][24][25] fluxes at Mukhrino and stressed differences across the microlandscapes. Namely, it was found that the net exosystem exchange of CO 2 averaged over three growing seasons at the hollow site was significantly higher than at the ridge site.…”

Section: Introductionmentioning

confidence: 99%

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Quantifying Spatial Heterogeneities of Surface Heat Budget and Methane Emissions over West-Siberian Peatland: Highlights from the Mukhrino 2022 Campaign

Chechin,

Repina,

Artamonov

et al. 2024

Forests

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The study presents the first results from the multi-platform observational campaign carried out at the Mukhrino peatland in June 2022. The focus of the study is the quantification of spatial contrasts of the surface heat budget terms and methane emissions across the peatland, which arise due to the presence of microlandscape heterogeneities. It is found that surface temperature contrasts across the peatland exceeded 10 °C for clear-sky conditions both during day and night. Diurnal variation of surface temperature was strongest over ridges and drier hollows and was smallest over the waterlogged hollows and shallow lakes. This resulted in strong spatial variations of sensible heat flux (H) and Bowen ratio, while the latent heat varied much less. During the clear-sky days, H over ryam exceeded the one over the waterlogged hollow by more than a factor of two. The Bowen ratio amounted to about unity over ryam, which is similar to values over forests. Methane emissions estimated using the static-chamber method also strongly varied between various microlandscapes, being largest at a hollow within a ridge-hollow complex and smallest at a ridge. A strong nocturnal increase in methane mixing ratio was observed and was used in the framework of the atmospheric boundary layer budget method to estimate nocturnal methane emissions, which were found to be in the same order of magnitude as daytime emissions. Finally, the directions for further research are outlined, including the verification of flux-aggregation techniques, parameterizations of surface roughness and turbulent exchange, and land-surface model evaluation and development.

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Section: Ch 4 Emissionscontrasting

confidence: 43%