Effect of clear-cutting on soil CO2 emission

Молчанов, А. Г.; Kurbatova, Yu. A.; Olchev, Alexander

doi:10.1134/s1062359016060121

Cited by 14 publications

(5 citation statements)

References 12 publications

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“…where W is the air velocity through the chamber (l/hour), M is the molar mass of CO2 (g/mol), z is the conversion factor from μg to g (10 -6 g/μg); S is the area of the horizontal section of the chamber (m 2 ), Vm is the molar volume of CO2 (l/mol), K is the temperature in Kelvin at standard conditions (273 K), T is the air temperature (°C). More information about the measurement method can be found in Molchanov et al (2017).…”

Section: Flux Calculationmentioning

confidence: 99%

Net ecosystem exchange of carbon dioxide on hayland with drained peat soil in central European Russia: mowing scenario analysis

Il’yasov

Молчанов

Suvorov

et al. 2021

Archives of Agronomy and Soil Science

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Section: Flux Calculationmentioning

confidence: 99%

Net ecosystem exchange of carbon dioxide on hayland with drained peat soil in central European Russia: mowing scenario analysis

Il’yasov

Молчанов

Suvorov

et al. 2021

Archives of Agronomy and Soil Science

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“…It cannot be used for representative flux measurements in areas with nonuniform vegetation distribution and complex topography. The chamber method can be used to measure soil and leaf GHG fluxes at experimental sites with highly heterogeneous topography and mosaic vegetation, but it does not allow flux averaging over a large area without a large number of simultaneous measurements on different experimental plots [8]. Considering the potential limitations of different in situ methods for regional flux estimation, remote sensing in this case can be a very useful tool for flux estimation over non-uniform land surfaces.…”

Section: Introductionmentioning

confidence: 99%

Inverse problem for retrieving greenhouse gas fluxes at the non-uniform underlying surface from measurements of their concentrations at several levels

Mukhartova,

Olchev,

Gibadullin

et al. 2024

J. Phys.: Conf. Ser.

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The study focuses on the formulation, analysis, and solution of the remote sensing inverse problem to retrieve surface carbon dioxide (CO2) fluxes from measurements of CO2 concentrations at different levels within the atmospheric boundary layer. A three-dimensional hydrodynamic model of turbulent greenhouse gas (GHG) transport was used as a forward model to link the surface GHG fluxes to the drone observations of GHG concentrations. The 3D model provides a GHG concentration distribution by solving the diffusion-advection equation using information on wind speed, its direction, and turbulent exchange coefficients. The surface GHG fluxes are considered as a boundary condition. The spatial distributions of wind speed and turbulence coefficient “for a moment in time” are computed from the relaxation problem for the averaged Navier-Stokes and continuity equations, using a 1.5 order closure scheme (E-ω model). The inverse problem is to retrieve a surface GHG flux by minimizing the difference between the measured and modelled concentrations at several levels. The algorithm was applied to estimate CO2 fluxes over a non-uniform forest canopy at the Roshny-Chu experimental site in the foothills of the Greater Caucasus (Chechen Republic). To test the forward numerical problem, data on surface topography, vegetation height and density, spatial distribution of photosynthetically active solar radiation, as well as data on plant photosynthesis and soil CO2 fluxes were used.

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“…Clear-cutting is one of the most widespread logging practice, which can substantially transform energy, water vapor and CO 2 exchange between forest ecosystems and the atmosphere and affect the climate system at multiple scales. Effects of different logging practices as well as natural forest disturbances on vegetation-atmosphere interaction is a key topic of various experimental and modeling studies provided over the recent decades (Amiro et al 2010;Masek and Collatz 2006;Olchev et al 2009;Radler et al 2010;Coursolle et al 2012;Ma et al 2013;Molchanov et al 2017). Clear-cutting influences surface albedo, net radiation, surface roughness and consequently the energy flux partitioning into sensible (H), latent (LE) and soil heat fluxes (McCaughey 1985;Amiro 2001;Rannik et al 2002;Kowalski et al 2003).…”

Section: Introductionmentioning

confidence: 99%

“…Most of previous experimental studies were performed at disturbed forest ecosystems in North America and Europe but effects of clear-cutting on ecosystem-atmosphere exchange in Russian boreal forests are still very poorly investigated and represented in a couple of experimental and modeling studies only (e.g. Machimura et al 2008;Mamkin et al 2016Mamkin et al , 2019Molchanov et al 2017). Boreal forests cover large areas in Russia and they are very sensitive to different natural and anthropogenic disturbances (zamolodchikov et al 2017).…”

Section: Introductionmentioning

confidence: 99%

Three-Year Variability Of Energy And Carbon Dioxide Fluxes At Clear-Cut Forest Site In The European Southern Taiga

Mamkin

Mukhartova

Diachenko

et al. 2019

GES

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Forest clearing strongly influences the energy, water and greenhouse gas exchange at the land surface-atmosphere interface. To estimate effects of clear cutting on sensible (H), latent heat (LE) and CO 2 fluxes the continuous eddy covariance measurements were provided at the recently clear-cut area situated in the western part of Russia from spring 2016 to the end of 2018. The possible effects of surrounding forest on the air flow disturbances and on the spatial pattern of horizontal advection terms within the selected clear-cut area were investigated using a process-based 3D momentum, energy and CO 2 exchange model. The modeling results showed a very low contribution of horizontal advection term into total turbulent momentum fluxes at flux tower location in case of the southern wind direction. The results of field flux measurements indicated a strong interand intra-annual variability of energy and CO 2 fluxes. The energy budget is characterized by higher daily and monthly LE fluxes throughout the entire period of measurements excepting the first two months after timber harvest. The mean Bowen ratio (β=H/LE) was 0.52 in 2016, 0.30-in 2017 and 0.35-in 2018. Analysis of CO 2 fluxes during the first year following harvest showed that the monthly CO 2 release at the clear-cut area consistently exceeded the CO2 uptake rates. The mean net ecosystem exchange (NEE) in the period was 3.3±1.3 gC•m-2 •d-1. During the second and the third years of the flux measurements the clear-cut was also a prevailed sink of CO 2 for the atmosphere excepting short periods in June and in the first part of July when daily CO 2 uptake was higher than CO 2 release rates. The mean NEE rates averaged for the entire warm period of corresponding years were 1.2±2.3 gС•m-2 •d-1 in 2017 and 2.8±2.5 gC•m-2 •d-1 in 2018, respectively. The mean ratio between gross primary production (GPP) and ecosystem respiration (TER) was 0.58

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Effect of clear-cutting on soil CO2 emission

Cited by 14 publications

References 12 publications

Net ecosystem exchange of carbon dioxide on hayland with drained peat soil in central European Russia: mowing scenario analysis

Net ecosystem exchange of carbon dioxide on hayland with drained peat soil in central European Russia: mowing scenario analysis

Inverse problem for retrieving greenhouse gas fluxes at the non-uniform underlying surface from measurements of their concentrations at several levels

Three-Year Variability Of Energy And Carbon Dioxide Fluxes At Clear-Cut Forest Site In The European Southern Taiga

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