Spectral estimation of wetland carbon dioxide exchange

Chojnicki, Bogdan H.

doi:10.2478/v10247-012-0061-3

Cited by 9 publications

(6 citation statements)

References 129 publications

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“…According to the 2006 FAO soil classification, the peat substrate floating on the surface can be classified as Limnic Hemic Floatic Ombric Rheic Histosol (Epidystric). The methane measurement site is located in the middle of the mire near a 400 m long wooden footbridge leading to the eddy covariance tower where the CO 2 , H 2 O and CH 4 are measured (Chojnicki, 2013;Chojnicki et al, 2007Chojnicki et al, , 2010. The methane site is dominated by Carex spp., Oxycoccus palustris Pers.…”

Section: Methodsmentioning

confidence: 99%

Biases in methane chamber measurements in peatlands

Juszczak¹

2013

International Agrophysics

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A b s t r a c t. The paper presents results of CH 4 emission measurements at peatland with the application of the dynamic chamber technique. The measurements were conducted in two types of chambers differing in shape, height, volume and technology used to assure their tightness. The study tested how the following factors: 1) forced chamber headspace mixing or its absence, 2) mistakes of the person conducting measurements, 3) improper application of linear technique for calculating CH 4 fluxes, and 4) simulated air sampling typical for static chambers, influence the significance of errors and the underestimation rate of CH 4 fluxes measured in situ. It was indicated that chamber headspace mixing allows estimating methane fluxes with a smaller error than in the case of measurements conducted without mixing, and CH 4 fluxes in such conditions can be 47 to 58% higher (depending on the chamber type) than in a chamber without fans. Using dynamic chambers and a fast analyzer to measure methane fluxes allows shortening the methane measurement process to a few minutes. On the other hand, using static chambers for methane flux measurements may lead to 70% underestimation of the calculated flux.K e y w o r d s: chamber measurements, methane, flux calculation method, biases in chamber measurements

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Section: Methodsmentioning

confidence: 99%

Biases in methane chamber measurements in peatlands

Juszczak¹

2013

International Agrophysics

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“…The values of NDVIb correlate well with satellite normalized difference vegetation index (NDVI) data, but it does not suffer from discontinuity problems that stem from the remotely obtained observations [80]. Thus, the NDVIb was used here as a proxy for vegetation CO 2 uptake capacity since the relation between NDVIb and gross ecosystem production (GEP) was found to be noticeable on the studied site [81]. Within this study, the gross ecosystem production (GEP) is approximated as GPP, and small discrepancies between GPP and GEP were ignored here.…”

Section: Meteorological Measurementsmentioning

confidence: 83%

Impact of Atmospheric Optical Properties on Net Ecosystem Productivity of Peatland in Poland

et al. 2021

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Peatlands play an important role in the global carbon cycle due to the high carbon storage in the substrate. Ecosystem production depends, for example, on the solar energy amount that reaches the vegetation, however the diffuse component of this flux can substantially increase ecosystem net productivity. This phenomenon is observed in different ecosystems, but the study of the atmosphere optical properties on peatland production is lacking. In this paper, the presented methodology allowed us to disentangle the diffuse radiation impact on the net ecosystem production (NEP) of Rzecin peatland, Poland. It allowed us to assess the impact of the atmospheric scattering process determined by the aerosol presence in the air mass. An application of atmospheric radiation transfer (ART) and ecosystem production (EP) models showed that the increase of aerosol optical thickness from 0.09 to 0.17 caused NEP to rise by 3.4–5.7%. An increase of the diffusion index (DI) by 0.1 resulted in an NEP increase of 6.1–42.3%, while a DI decrease of 0.1 determined an NEP reduction of −49.0 to −10.5%. These results show that low peatland vegetation responds to changes in light scattering. This phenomenon should be taken into account when calculating the global CO2 uptake estimation of such ecosystems.

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“…In 2004, a permanent monitoring station was established in the middle of study area, where micrometeorological (heat, carbon dioxide, and methane fluxes between atmosphere and peatland) measurements are carried out (Chojnicki, 2013;Chojnicki et al, 2007Chojnicki et al, , 2012Juszczak, 2013;Juszczak et al, 2012aJuszczak et al, , 2012bKowalska et al, 2013). These observations are augmented with standard meteorological parameter measurements, for example, temperature, precipitation, and radiation.…”

Section: Study Sitementioning

confidence: 99%

Hydrological changes in the Rzecin peatland (Puszcza Notecka, Poland) induced by anthropogenic factors: Implications for mire development and carbon sequestration

et al. 2016

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Wetlands are very vulnerable ecosystems and sensitive to changes in the ground water table. For the last few thousand years, hydrological balance has also been influenced by human activity. To improve their cropping features, drainage activity and fertilizing were applied. The drainage process led to an abrupt change of environment, the replacement of plant communities and the entire ecosystem. The problem of carbon sequestration is very important nowadays. A higher accumulation rate is related to higher carbon accumulation, but the intensity of carbon sequestration depends on the type of mire, habitat, and climatic zone. The main aim of this article was an examination of the changes in poor-fen ecosystem during the last 200 years in relation to natural and anthropogenic factors, using paleoecological methods (pollen and macrofossils). The second aim was a detailed investigation of the sedimentary record to aid our understanding of carbon sequestration in the poor fen of temperate zone. This case study shows that fens in temperate zones, in comparison with boreal ones, show higher carbon accumulation rates which have been especially intensive over the last few decades. To reconstruct vegetation changes, detailed palynological and macrofossil analyses were done. A 200-year history of the mire revealed that it was influenced by human activity to much degree. However, despite the nearby settlement and building of the drainage ditch, the precious species and plant communities still occur.

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Spectral estimation of wetland carbon dioxide exchange

Cited by 9 publications

References 129 publications

Biases in methane chamber measurements in peatlands

Biases in methane chamber measurements in peatlands

Impact of Atmospheric Optical Properties on Net Ecosystem Productivity of Peatland in Poland

Hydrological changes in the Rzecin peatland (Puszcza Notecka, Poland) induced by anthropogenic factors: Implications for mire development and carbon sequestration

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