Methane emissions in two drained peat agro-ecosystems with high and low agricultural intensity

Methane (CH4) emissions were compared for an intensively and extensively managed agricultural area on peat soils in the Netherlands to evaluate the effect of reduced management on the CH4 balance. Chamber measurements (photoacoustic methods) for CH4 were performed for a period of three years in the contributing landscape elements in the research...

Annual balances of CH4 and N2O from a managed fen meadow using eddy covariance flux measurements

Annual terrestrial balances of methane (CH4) and nitrous oxide (N2O) are presented for a managed fen meadow in the Netherlands for 2006, 2007 and 2008, using eddy covariance (EC) flux measurements. Annual emissions derived from different methods are compared. The most accurate annual CH4 flux is achieved by gap filling EC fluxes with an...

Comparison of chamber and eddy covariance-based CO2 and CH4 emission estimates in a heterogeneous grass ecosystem on peat

Fluxes of methane (CH4) and carbon dioxide (CO2) estimated by empirical models based on small-scale chamber measurements were compared to large-scale eddy covariance (EC) measurements for CH4 and to a combination of EC measurements and EC-based models for CO2. The experimental area was a flat peat meadow in the Netherlands with heterogeneous...

Beïnvloeden van landgebonden broeikasgasemissies

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How the CH4 balance and the total GHG balance are changing if agricultural peat lands are transformed into wetland nature

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Micrometeorological observations of CH4 and N2O at a managed fen meadow in the Netherlands

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Greenhouse gas emissions: spatial and seasonal variability in two managed peat meadows in the Netherlands and the comparison of small scale and large scale measurement techniques

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Eddy covariance observations of CH4 and N2O: Towards more accurate emission estimates

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Micrometeorological observations of CH4 and N2O at a managed fen meadow in the Netherlands

Global atmospheric concentrations of CO2, CH4 and N2O have increased markedly as a result of human activities since 1750 (30%, 150% and 17% respectively). The global increases in carbon dioxide concentration are primarily due to fossil fuel and land-use change, while those of methane and nitrous oxide are primarily due to agriculture (IPCC, 2007...

Variability of annual CO2 exchange from Dutch grasslands

An intercomparison is made of the Net Ecosystem Exchange of CO2, NEE, for eight Dutch grassland sites: four natural grasslands, two production grasslands and two meteorological stations within a rotational grassland region. At all sites the NEE was determined during at least 10 months per site, using the eddy-covariance (EC) technique, but in...

Inter-comparison of chamber and eddy-correlation flux measurements

At various sites in the Netherlands closed gas chamber measurements and eddy correlation measurements are carried out in order to determine greenhouse gas fluxes (CH4, N2O and CO2). For this purpose various measurement set-ups and devices are used. The results of all these measurements are used to understand small scale processes that generate...

Evaluation of chamber configurations for CH4 and N2O measurements

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