The Impact of Climatic Factors on CО2 Emissions from Soils of Middle-Taiga Forests in Central Siberia: Emission as a Function of Soil Temperature and Moisture

Makhnykina, A. V.; Prokushkin, Anatoly; Menyailo, O. V.; Verkhovets, S. V.; Tychkov, Ivan; Urban, Anastasiya; Rubtsov, Alexey V.; Koshurnikova, Nataly N.; Vaganov, Еugene А.

doi:10.1134/s1067413620010063

Cited by 26 publications

(7 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The climate of the region is continental with severe snowy winters and moderately warm humid summers. The average annual air temperature is -3.5°С, the annual precipitation is 594 mm [10]. Based on the World Reference Base soil classification system, the soils of the study catchments are Podzols and Histosols.…”

Section: Methodsmentioning

confidence: 99%

Nutrients in streams draining the different types of wetlands in Western Siberian Plain

Tokareva

Korets

Prokushkin

2022

IOP Conf. Ser.: Earth Environ. Sci.

View full text Add to dashboard Cite

Two second order streams were compared to test the influence of peatbog type (minerotrophic vs. oligotrophic) on dissolved nutrient composition and dynamics during several hydrologic years. A significant spatio-temporal variation in the concentration of nutrients in the channel runoff is shown. It depends on the catchment characteristics and the hydrological period of the year. In general, the concentrations of phosphates, nitrates and nitrites are lower in the stream draining an area dominated by a minerotrophic bog that indicates nutrients removal by more intense microbiological activity. This is also confirmed by the greater amount of ammonium nitrogen present in the streamflow. In the annual runoff of both streams, the ammonium form dominates dissolved inorganic nitrogen. The minimum concentration of phosphates is observed in winter, and ammonium in the spring flood. In the territory with a predominance of minerotrophic bogs the stream runoff is enriched in calcium, magnesium and silicon indicating specific major cation-rich groundwater input.

show abstract

Section: Methodsmentioning

confidence: 99%

Nutrients in streams draining the different types of wetlands in Western Siberian Plain

Tokareva

Korets

Prokushkin

2022

IOP Conf. Ser.: Earth Environ. Sci.

View full text Add to dashboard Cite

show abstract

“…Seasonal soil CO 2 emissions for the studied region varies in a high range, and the mean daily fluxes vary from 0.4 to 10.9 µmol m −2 s −1 [60][61][62]. Even in the wettest seasons, the momentum SR rate does not exceed 16.5 µmol m −2 s −1 [63]. In general, these values are in agreement with existing estimates for boreal regions where the daily mean soil emission rates during a growing season ranged from 0.5 to 4 µmol m −2 s −1 [2,49,59].…”

Section: Rain-induced Co 2 Pulsesmentioning

confidence: 89%

The Pulses of Soil CO2 Emission in Response to Rainfall Events in Central Siberia: Revisiting the Overall Frost-Free Season CO2 Flux

Makhnykina,

Vaganov,

Panov

et al. 2024

Forests

View full text Add to dashboard Cite

Boreal forests nowadays act as a sink for atmospheric carbon dioxide; however, their sequestration capacity is highly sensitive to weather conditions and, specifically to ongoing climate warming. Extreme weather events such as heavy rainfalls or, conversely, heat waves during the growing season might perturb the ecosystem carbon balance and convert them to an additional CO2 source. Thus, there is an urgent need to revise ecosystem carbon fluxes in vast Siberian taiga ecosystems as influenced by extreme weather events. In this study, we focused on the soil CO2 pulses appearing after the rainfall events and quantification of their input to the seasonal cumulative CO2 efflux in the boreal forests in Central Siberia. Seasonal measurements of soil CO2 fluxes (both soil respiration and net soil exchange) were conducted during three consecutive frost-free seasons using the dynamic chamber method. Seasonal dynamics of net soil exchange fluxes demonstrated positive values, reflecting that soil respiration rates exceeded CO2 uptake in the forest floor vegetation layer. Moreover, the heavy rains caused a rapid pulse of soil emissions and, as a consequence, the release of additional amounts of CO2 from the soil into the atmosphere. A single rain event may cause a 5–11-fold increase of the NSE flux compared to the pre-rainfall values. The input of CO2 pulses to the seasonal cumulative efflux varied from near zero to 39% depending on precipitation patterns of a particular season. These findings emphasize the critical need for more frequent measurements of soil CO2 fluxes throughout the growing season which capture the CO2 pulses induced by rain events. This approach has inevitable importance for the accurate assessment of seasonal CO2 soil emissions and adequate predictions of response of boreal pine forests to climatic changes.

show abstract

“…The threshold soil moisture for each ecosystem considered is a specific value that can be calculated by the algorithm previously reported in the study of Makhnykina et al (2020). This parameter allows not only to observe the changes in seasonal dynamics of soil CO 2 emission more accurately, but also to establish how strongly moisture conditions may limit a specific ecosystem.…”

Section: Discussionmentioning

confidence: 99%

“…2) that corresponds to the minimum soil moisture at which a significant dependence is observed between soil CO 2 emis-sion and soil temperature without limitation by moisture conditions. In this study, we used just a linear relationship between soil CO 2 emission and soil temperature to find out a significant correlation in comparison to our previous study where we used an exponential relationship between emission and temperature (Makhnykina et al 2020). The remaining steps of the algorithm for calculating the threshold soil moisture content are identical.…”

Section: Modeling Seasonal Soil Co 2 Emissionsmentioning

confidence: 99%

Factors of soil CO2 emission in boreal forests: evidence from Central Siberia

Makhnykina¹,

Tychkov²,

Prokushkin³

et al. 2023

iForest

View full text Add to dashboard Cite

Soils of boreal forests are crucial carbon reserves. The response of soil carbon emission to climate change significantly affects the concentration of carbon dioxide in the atmosphere. Soil carbon emission models frequently show a nonlinear response to temperature, but soil moisture is an important limiting factor, often overlooked in energy limited ecosystems. We suggest a statistical model of soil CO2 emission constrained by soil moisture and temperature for different ecosystems in the boreal zone. We tested this modelling strategy using direct measurements of seasonal soil CO2 emission near the research observatory ZOTTO near the Bor settlement, Central Siberia, Russia, in 2012-2017. Soil moisture explained a significant amount of variability of soil emission: the adjusted R 2 was twice higher than in the baseline model. Although the temperature-only model describes the annual variability of carbon dioxide emissions quite well, the addition of moisture measurement significantly refines the quality of prediction of the seasonal component dynamics. Models including both temperature and soil moisture could serve as a promising tool to analyze the carbon cycle in boreal forest ecosystems.

show abstract

The Impact of Climatic Factors on CО2 Emissions from Soils of Middle-Taiga Forests in Central Siberia: Emission as a Function of Soil Temperature and Moisture

Cited by 26 publications

References 31 publications

Nutrients in streams draining the different types of wetlands in Western Siberian Plain

Nutrients in streams draining the different types of wetlands in Western Siberian Plain

The Pulses of Soil CO2 Emission in Response to Rainfall Events in Central Siberia: Revisiting the Overall Frost-Free Season CO2 Flux

Factors of soil CO2 emission in boreal forests: evidence from Central Siberia

Contact Info

Product

Resources

About