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Hensen, A. (author), Kroon, P.S. (author), Schrier, A.P. (author), Jonker, H. (author), Veenendaal, E.M. (author)
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...
article 2010
document
Energieonderzoek Centrum Nederland (author), Hensen, A. (author), Kroon, P.S. (author), Jonker, H. (author)
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article 2010
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Hensen, A. (author), Kroon, P.S. (author), Jonker, H. (author), Bosveld, F.C. (author), Schuitmaker, A. (author), Tummers, M.J. (author)
Eddy covariance (EC) technique is often used to determine greenhouse gas exchange at the earth’s surface. In general, the instruments involved have a limited high frequency response which reduces the ability to detect the contribution to the flux of small eddies and in addition sensor separation gives high frequency losses. These missing...
article 2010
document
Vermeulen, A.T. (author), Hensen, A. (author), Kroon, P.S. (author), Jonker, H. (author), Bosveld, F.C. (author), Ouwersloot, H.G. (author)
The uncertainty in eddy covariance (EC) flux measurements is assessed for CH4 and N2O using data measured at a dairy farm site in the Netherlands in 2006 and 2007. An overview is given of the contributing uncertainties and theirmagnitude. The relative and absolute uncertainty of a 30 min EC flux are estimated for CH4 and N2O using N = 2185 EC...
article 2010
document
Energieonderzoek Centrum Nederland (author), Hensen, A. (author), Kroon, P.S. (author), Schrier, A.P. (author), Jonker, H. (author), Bosveld, F.C. (author), Tummers, M.J. (author)
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conference paper 2009
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Hensen, A. (author), Kroon, P.S. (author), Jonker, H. (author)
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public lecture 2009
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van `t Veen, W.H. (author), Vermeulen, A.T. (author), Hensen, A. (author), Kroon, P.S. (author), Jonker, H. (author), Bosveld, F.C. (author), Ouwersloot, H.G. (author)
The overall uncertainty in annual flux estimates derived from chamber measurements may be as high as 50% due to the temporal and spatial variability in the fluxes (Flechard et al., 2005). As even a large number of chamber plots still cover typically less than 1% of the total field area, the field-scale integrated emission necessarily remains a...
public lecture 2009
document
Hensen, A. (author), Kroon, P.S. (author), Jonker, H. (author)
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public lecture 2009
document
Hensen, A. (author), Kroon, P.S. (author), Schrier, A.P. (author), Jonker, H. (author), Bosveld, F.C. (author), Tummers, M.J. (author)
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public lecture 2009
document
Kroon, P.S. (author), Jonker, H. (author), Schuitmaker, A. (author), Tummers, M.J. (author)
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conference paper 2008
document
Hensen, A. (author), Kroon, P.S. (author), Jonker, H. (author), Ouwersloot, H.G. (author)
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public lecture 2008
document
van `t Veen, W.H. (author), Vermeulen, A.T. (author), Hensen, A. (author), Kroon, P.S. (author), Jonker, H. (author)
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public lecture 2008
document
van `t Veen, W.H. (author), Vermeulen, A.T. (author), Hensen, A. (author), Kroon, P.S. (author), Jonker, H. (author)
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public lecture 2007
document
Vermeulen, A.T. (author), Hensen, A. (author), Kroon, P.S. (author), Jonker, H. (author)
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public lecture 2007
document
van `t Veen, W.H. (author), Vermeulen, A.T. (author), Hensen, A. (author), Kroon, P.S. (author), Jonker, H. (author), Zahniser, M.S. (author)
A quantum cascade laser spectrometer was evaluated for eddy covariance flux measurements of CH4 and N2O using three months of continuous measurements at a field site. The required criteria for eddy covariance flux measurements including continuity, sampling frequency, precision and stationarity were examined. The system operated continuously at...
article 2007
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