Scientific Commons: A. Hensen

A major international experiment on ammonia (NH3) biosphere-atmosphere exchange was conducted over intensively managed grassland at Braunschweig, Germany. The experimental...

Ammonia fluxes in relation to cutting and fertilization of an intensively managed grassland derived from an inter-comparison of gradient measurements (2009)

C. Milford, M. R. Theobald, E. Nemitz, K. J. Hargreaves, L. Horvath, J. Raso, ...

Quantification of ammonia (NH3) land-atmosphere exchange is required for atmospheric modelling and assessment of nitrogen deposition, yet flux measurement methods remain highly...

Significant non-linearity in nitrous oxide chamber data and its effect on calculated annual emissions (2009)

P. C. Stolk, E. J. Moors, A. Hensen, G. L. Velthof, P. Kabat

Chambers are widely used to measure surface fluxes of nitrous oxide (N2O). Usually linear regression is used to calculate the fluxes from the chamber data. Non-linearity in the...

Advection of NH3 over a pasture field, and its effect on gradient flux measurements (2009)

B. Loubet, C. Milford, A. Hensen, U. Daemmgen, P. Cellier, ...

Deposition of atmospheric ammonia (NH3) to semi-natural ecosystems leads to serious adverse effects, such as acidification and eutrophication. A step in this quantification is the measurement of NH3...

Intercomparison and assessment of turbulent and physiological exchange parameters of grassland (2009)

E. Nemitz, K. J. Hargreaves, A. Neftel, B. Loubet, P. Cellier, J. R. Dorsey, ...

Commonly, the micrometeorological parameters that underline the calculations of surface atmosphere exchange fluxes (e.g. friction velocity and sensible heat flux) and parameters used to model...

Aerosol fluxes and particle growth above managed grassland (2009)

E. Nemitz, J. R. Dorsey, M. J. Flynn, M. W. Gallagher, A. Hensen, ...

Particle deposition velocities (11–3000 nm diameter) measured above grassland by eddy covariance during the EU GRAMINAE experiment in June 2000 averaged 0.24 and 0.03 mm...

Turbulence characteristics in grassland canopies and implications for tracer transport (2009)

E. Nemitz, B. Loubet, B. E. Lehmann, P. Cellier, A. Neftel, S. K. Jones, ...

In-canopy turbulence is a required input to study pollutant cycling and chemistry within plant canopies and to link concentrations and sources. Despite the importance of grasslands worldwide, most...

Estimation of NH3 emissions from a naturally ventilated livestock farm using local-scale atmospheric dispersion modelling (2009)

A. Hensen, B. Loubet, J. Mosquera, J. W. Erisman, U. Dämmgen, ...

Agricultural livestock represents the main source of ammonia (NH3) in Europe. In recent years, reduction policies have been applied to reduce NH3 emissions. In order to estimate the impacts of these...

Dynamics of ammonia exchange with cut grassland: synthesis of results and conclusions of the GRAMINAE Integrated Experiment (2009)

M. A. Sutton, E. Nemitz, C. Milford, C. Campbell, J. W. Erisman, A. Hensen, ...

Improved data on biosphere-atmosphere exchange are fundamental to understanding the production and fate of ammonia (NH3) in the atmosphere. The GRAMINAE Integrated Experiment...

Advection of NH3 over a pasture field and its effect on gradient flux measurements (2009)

B. Loubet, C. Milford, A. Hensen, U. Daemmgen, P. Cellier, ...

Deposition of atmospheric ammonia (NH3) to semi-natural ecosystems leads to serious adverse effects, such as acidification and eutrophication. A step in quantifying such effects is the measurement of...

Intercomparison and assessment of turbulent and physiological exchange parameters of grassland (2009)

E. Nemitz, K. J. Hargreaves, A. Neftel, B. Loubet, P. Cellier, J. R. Dorsey, ...

Commonly, the micrometeorological parameters that underline the calculations of surface atmosphere exchange fluxes (e.g. friction velocity and sensible heat flux) and parameters used to model...

Turbulence characteristics in grassland canopies and implications for tracer transport (2009)

E. Nemitz, B. Loubet, B. E. Lehmann, P. Cellier, A. Neftel, S. K. Jones, ...

In-canopy turbulence is a required input to study pollutant cycling and chemistry within plant canopies and to link concentrations and sources. Despite the importance of grasslands worldwide, most...

Aerosol fluxes and particle growth above managed grassland (2009)

E. Nemitz, J. R. Dorsey, M. J. Flynn, M. W. Gallagher, A. Hensen, ...

Particle deposition velocities (11–3000 nm diameter) measured above grassland by eddy covariance during the EU GRAMINAE experiment in June 2000 averaged 0.24 and 0.03 mm...

Dynamics of ammonia exchange with cut grassland : strategy and implementation of the GRAMINAE Integrated Experiment (2009)

Sutton, M.A., Nemitz, E., Theobald, M.R., Milford, C., Dorsey, J.R., Gallagher, M.W., ...

A major international experiment on ammonia (NH3) biosphere-atmosphere exchange was conducted over intensively managed grassland at Braunschweig, Germany. The experimental strategy was developed to...

Biosphere-atmosphere exchange of reactive nitrogen and greenhouse gases at the NitroEurope core flux measurement sites: measurment strategy and first data sets. (2009)

Skiba, U., Drewer, J., Tang, Y.S., Van Dijk, N., Helfter, C., Nemitz, E., ...

Agriculture, Ecosystems and Environment, 133(2009) S.139-49

Zelfsturing kan niet zonder doelen en monitoring (2008)

Kros, H., Knotters, M., Roelsma, J., Bleeker, A., ...

Measuring ammonia emissions from manured fields (2008)

Berkhout, A.J.C., Hoff, G.R., Bergwerff, J.B., Swart, D.P.J., Hensen, A., Kraai, A., ...

Dynamics of ammonia exchange with cut grassland: strategy and implementation of the GRAMINAE Integrated Experiment (2008)

M. A. Sutton, E. Nemitz, M. R. Theobald, C. Milford, J. R. Dorsey, M. W. Gallagher, ...

A major international experiment on ammonia (NH3) biosphere-atmosphere exchange was conducted over intensively managed grassland at Braunschweig, Germany. The experimental...

Inter-comparison of ammonia fluxes obtained using the relaxed eddy accumulation technique (2008)

A. Hensen, E. Nemitz, M. J. Flynn, A. Blatter, S. K. Jones, L. L. Sørensen, ...

The exchange of NH3 between grassland and the atmosphere was determined using Relaxed Eddy Accumulation (REA) measurements. The use of REA is of special interest for...

Ammonia fluxes in relation to cutting and fertilization of an intensively managed grassland derived from an inter-comparison of gradient measurements (2008)

C. Milford, M. R. Theobald, E. Nemitz, K. J. Hargreaves, L. Horvath, J. Raso, ...

Quantification of ammonia (NH3) land-atmosphere exchange is required for atmospheric modelling and assessment of nitrogen deposition, yet flux measurement methods remain highly...

Effects of climate and management intensity on nitrous oxide emissions in grassland systems across Europe (2007)

Flechard, C., Ambus, P., Skiba, U., Rees, R.M., Hensen, A., ...

Soil/atmosphere exchange fluxes of nitrous oxide were monitored for a 3-year period at 10 grassland sites in eight European countries (Denmark, France, Hungary, Ireland, Italy, The Netherlands,...

Multi-purpose ammonia measurements on a landscape level (2007)

Bleeker, A., Hensen, A., Gies, E., Kros, J., Sonneveld, M.P.W.

Variability of annual CO2 exchange from Dutch grasslands (2007)

Jacobs, C.M.J., Jacobs, A.F.G., Bosveld, F.C., Hendriks, D.M.D., Hensen, A., Kroon, P., ...

Partitioning European grassland net ecosystem CO2 exchange into grass primary productivity and ecosystem respiration using response function analysis (2007)

Gilmanov, T.G., Soussana, J.F., Aires, A., Allard, V., Ammann, C., Balzarolo, M., ...

Micrometeorological observations of CH4 and N2O at a managed fen meadow in the Netherlands (2007)

Kroon, P. S., Hendriks, D.M.D., Schrier-Uijl, A.P., Hensen, A.

Carbon balance Greenhouse gas fluxes in intensive managed grasslands on peat (2007)

Veenendaal, E.M., Hendriks, D., Kroon, P., Schrier-Uijl, A.P., Hensen, A., ...

Variability of annual CO2 exchange from Dutch Grasslands (2007)

Jacobs, C. M. J., Jacobs, A. F. G., Bosveld, F. C., Hendriks, D. M. D., Hensen, A., Kroon, P. S., ...

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...

Suitability of quantum cascade laser spectrometry for CH4 and N2O eddy covariance measurements (2007)

Kroon, P. S., Hensen, A., Jonker, H. J. J., Zahniser, M. S., Van 'T Veen, W. H., Vermeulen, A. T.

A quantum cascade laser spectrometer was evaluated for eddy covariance measurements of CH4 and N2O using laboratory tests and three months of continuous measurements. Moreover, an indication was...

Variability of annual CO2 exchange from Dutch grasslands (2007)

Jacobs, C. M. J., Jacobs, A. F. G., Bosveld, F. C., Hendriks, D. M. D., Hensen, A., Kroon, P. S., ...

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...

Suitability of quantum cascade laser spectroscopy for CH4 and N2O eddy covariance flux measurements (2007)

Kroon, P. S., Hensen, A., Jonker, H. J. J., Zahniser, M. S., Van 'T Veen, W. H., Vermeulen, A. T.

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...

Variability of annual CO2 exchange from Dutch Grasslands (2007)

Jacobs, C. M. J., Jacobs, A. F. G., Bosveld, F. C., Hendriks, D. M. D., Hensen, A., Kroon, P. S., ...

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...

Suitability of quantum cascade laser spectrometry for CH4 and N2O eddy covariance measurements (2007)

Kroon, P. S., Hensen, A., Jonker, H. J. J., Zahniser, M. S., Van 'T Veen, W. H., Vermeulen, A. T.

A quantum cascade laser spectrometer was evaluated for eddy covariance measurements of CH4 and N2O using laboratory tests and three months of continuous measurements. Moreover, an indication was...

Variability of annual CO2 exchange from Dutch grasslands (2007)

Jacobs, C. M. J., Jacobs, A. F. G., Bosveld, F. C., Hendriks, D. M. D., Hensen, A., Kroon, P. S., ...

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...

Suitability of quantum cascade laser spectroscopy for CH4 and N2O eddy covariance flux measurements (2007)

Kroon, P. S., Hensen, A., Jonker, H. J. J., Zahniser, M. S., Van 'T Veen, W. H., Vermeulen, A. T.

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...

Full accounting of the greenhouse gas (CO2, N2O, CH4) budget of nine European grassland sites (2007)

Soussana, J.F., Allard, V., Pilegaard, K., Ambus, P., Amman, C., Campbell, C., ...

Carbon balance and greenhouse gas fluxes in intensive and extensive managed grasslands on peat (2007)

Veenendaal, E.M., Hendriks, D.M.D., Kroon, P., Schrier, A., Hensen, A., ...

Suitability of quantum cascade laser spectroscopy for CH4 and N2O eddy covariance flux measurements (2007)

P. S. Kroon, A. Hensen, M. S. Zahniser, A. T. Vermeulen

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...

Variability of annual CO2 exchange from Dutch grasslands (2007)

F. C. Bosveld, A. Hensen, P. S. Kroon, ...

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...

Suitability of quantum cascade laser spectrometry for CH4 and N2O eddy covariance measurements (2007)

P. S. Kroon, A. Hensen, M. S. Zahniser, A. T. Vermeulen

A quantum cascade laser spectrometer was evaluated for eddy covariance measurements of CH4 and N2O using laboratory tests and three months of continuous measurements. Moreover, an indication was...

Variability of annual CO2 exchange from Dutch Grasslands (2007)

F. C. Bosveld, A. Hensen, P. S. Kroon, ...

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...

Variability of annual CO2 exchange from Dutch grasslands (2007)

Jacobs, C.M.J., Jacobs, A.F.G., Bosveld, F.C., Hendriks, D.M.D., Hensen, A., Kroon, P. S., ...

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...

COMET: a Lagrangian transport model for greenhouse gas emission estimation ? forward model technique and performance for methane (2006)

Vermeulen, A. T., Pieterse, G., Hensen, A., Erisman, J. W.

The Lagrangian transport model COMET has been developed to evaluate emission estimates based on atmospheric concentration observations. This paper describes the model and its application in modelling...

COMET: a Lagrangian transport model for greenhouse gas emission estimation ? forward model technique and performance for methane (2006)

Vermeulen, A. T., Pieterse, G., Hensen, A., Erisman, J. W.

The Lagrangian transport model COMET has been developed to evaluate emission estimates based on atmospheric concentration observations. This paper describes the model and its application in modelling...

Deposition monitoring networks : what monitoring is required to give reasonable estimates of ammonia/ammonium? (2005)

Erisman, J.W., Hensen, A., Mosquera Losada, J., Sutton, M., Fowler, D.

Indirect nitrous oxide emissions from the Netherlands (2005)

Bleeker, A., Ligthart, T., Kuikman, P.J., Hamminga, W., ...

Enhancing methane oxidation in landfill top-layers: result of field trials (2005)

WOELDERS, H, OONK, H, HENSEN, A, Mahieu, Koenraad, De Visscher, Alex, VAN VELTHOVEN, F, ...

Greenhouse gas emissions from European grasslands (2004)

Soussana, J.F., Salètes, S., Smith, P., Schils, R.L.M., Ogle, S., Amézquita, M.C ., ...

Greenhouse gas emissions from European grasslands: CarboEurope GHG - Specific Study Number 3 (2004)

Soussana, J., Saletes, S., Smith, P., Ambus, P., Amezquita, M. C., Andren, O., ...

Groen gras en de Broeikas (2003)

Hensen, A., Kasper, G.J., Verkade, G.W.

Hoeveel CO2 wordt op een hectare grasland opgenomen, en hoeveel lachgas ontsnapt uit de bodem? Wat is de methaanemissie van de koeien die op die hectares grazen en hoeveel methaan komt er uit de mest...

Nitrogenius: a nitrogen decision support system (2002)

Erisman, J.W., Hensen, A., Kros, H., ...

Application of new measurement techniques and strategies to measure ammonia emissions from agricultural activities (2002)

Mosquera, J., Hofschreuder, P., Hensen, A.

Application of new measurement techniques and strategies to measure ammonia emissions from agricultural activities (2002)

Mosquera, J., Hofschreuder, P., Hensen, A.

The nitrogen decision support system: NitroGenius (2002)

Erisman, J.W., Hensen, A., Kros, H., ...

NitroGenius: game over, new game? Spelen om te leren en te regeren (2002)

Erisman, J.W., Hensen, A., Kros, H., ...

Integraal stikstofonderzoek; implementatie en gebruik van NitroGenius (2002)

Erisman, J.W., Hensen, A., Kros, H., ...

NitroGenius is a decision support system in the form of a game to helpsolve the complex nitrogen problems in the Netherlands. It was developed for the ministry of the Environment, Housing and Spatial...

Spelen om te leren en te regeren; NitroGenius: game over, new game? (2002)

Erisman, J.W., Hensen, A., Kros, H., ...

Instrument development and application in studies and monitoring of ambient ammonia (2001)

Erisman, J.W., Otjes, R., Hensen, A., Jongejan, P., Khlystov, A., ...

During recent years, it has become clear that ammonia is an important gas in relation to different environmental issues, such as acidification, eutrophication, human health and climate change...

Quantification and selection of measures to increase carbon stocks in agriculture (2000)

Aerts, R., Hensen, A., ...

Effect of drainage on CO2 exchange patterns in an intensively managed peat pasture (2000)

Dirks, B.O.M., Hensen, A., Goudriaan, J.

Eddy correlation measurements of CO2 exchange were made in intensively managed peat pastures at 2 different groundwater tables during most of a growing season. F was separated into a respiratory and...

Surface conductance and energy exchange in an intensively managed peat pasture (1999)

Dirks, B.O.M., Hensen, A.

Surface CO2 exchange in an intensively managed peat pasture (1999)

Dirks, B.O.M., Hensen, A., Goudriaan, J.

Emissions of CO2, CH4 and N2O from pasture on drained peat soils in The Netherlands (1999)

Langeveld, C.A., Segers, R., Dirks, B.O.M., Velthof, G.L., Hensen, A.

Transport model calculations of NW-European methane emissions (1999)

Vermeulen, A.T., Eisma, R., Hensen, A., Slanina, J.

Emissions of CO2, CH4 and N2O from pasture on drained peat soils in the Netherlands. (1997)

Langeveld, C.A., Segers, R., Dirks, B.O.M., Velthof, G.L., Hensen, A.

Emissions of CO2, CH4 and N2O from pasture on drained peat soils in the Netherlands. (1996)

Langeveld, C.A., Segers, R., Dirks, B.O.M., Velthof, G.L., Hensen, A.