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- van Dijk, S.M. (author), Duyzer, J.H. (author), Weststrate, J.H. (author), TNO Milieu, Energie en Procesinnovatie (author) report 1998
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TNO Milieu, Energie en Procesinnovatie (author), van Dijk, S.M. (author), Duyzer, J.H. (author)Nitric oxide (NO) fluxes to the atmosphere were determined from different soil types in coniferous forest and deciduous forest in the Netherlands. Dynamic chambers were used to determine the emission every week throughout a whole year. Forest type and soil texture seem important parameters leading to large differences in fluxes between sites....article 1998
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Thijsse, T.R. (author), Duyzer, J.H. (author), Verhagen, H.L.M. (author), Wyers, G.P. (author), Wayers, A. (author), Möls, J.J. (author), TNO Milieu, Energie en Procesinnovatie (author)Results of a study to evaluate the suitability of passive samplers for the measurement of monthly averaged ammonia concentrations are presented. Five different samplers were tested. Four were diffusion tube samplers which differed in length and in the way they were modified to minimize disturbing effects of wind turbulence. Also tested was a...conference paper 1998
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Walton, S. (author), Gallagher, M.W. (author), Duyzer, J.H. (author), TNO Milieu, Energie en Procesinnovatie (author)A 1D deposition model derived from work by Baldocchi, has been used to interpret the exchange of NO, NO2 and O3 measured over an orchard. Where possible, direct measurements from the orchard were used in favour of existing model parameterisations. The model incorporates NO(x)-O3 chemistry and an emission of NO at the air-soil interface. Model...article 1997
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Galmarini, S. (author), Vilà-Guerau De Arellano, J. (author), Duyzer, J.H. (author), TNO Milieu, Energie en Procesinnovatie (author)A method is presented for the calculation of the fluxes of chemically reactive species on the basis of routine measurements of meteorological variables and chemical species. The method takes explicity into account the influence of chemical reactions on the fluxes of the species. As a demonstration of the applicability of the method, micro...article 1997
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Instituut voor Milieuwetenschappen TNO (author), Wyers, G.P. (author), Duyzer, J.H. (author)Dry deposition fluxes of sulphate and nitrate have been determined over a coniferous canopy using the aerodynamic gradient technique. Vertical concentration gradients of sulphate and nitrate were measured with filters; the gradient of ammonium bisulphate was measured with thermodenuders. Filter measurements of sulphate yielded a deposition...article 1997
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- TNO Milieu, Energie en Procesinnovatie (author), Duyzer, J.H. (author), Weyers, G.P. (author), Ruigrok, W. (author), Erisman, J.W. (author), Fowler, D. (author), Spindler, G. (author) report 1996
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- TNO Milieu, Energie en Procesinnovatie (author), Weststrate, J.H. (author), Duyzer, J.H. (author), Smeenge, R. (author), van Herk, C.M. (author) report 1996
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Duyzer, J.H. (author), Weststrate, J.H. (author), Walton, S. (author), Instituut voor Milieuwetenschappen TNO (author)The deposition flux of O3 to a Douglas fir forest in the Netherlands was monitored by eddy correlation during nine months. At the same time the concentration gradients of NO, NO2 and O3 were determined over the forest. The canopy resistance to O3 uptake was calculated from the measurements ant it compared well with model estimates. The...conference paper 1995
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- Instituut voor Milieuwetenschappen TNO (author), Duyzer, J.H. (author) report 1995
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- Instituut voor Milieuwetenschappen TNO (author), Duyzer, J.H. (author) report 1995
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- Instituut voor Milieuwetenschappen TNO (author), Duyzer, J.H. (author), Weststrate, J.H. (author) report 1994
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- Instituut voor Milieuwetenschappen TNO (author), Duyzer, J.H. (author), Deinum, G. (author), Baak, J. (author) report 1994
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- Fowler, D. (author), Suttion, M.A. (author), Hargraeves, K.J. (author), Storeton-West, R.L. (author), Duyzer, J.H. (author), Westrate, J.H. (author), Verhagen, H.L.M. (author), Meixner, F.X. (author), Ludwig, J. (author), Müller, H. (author), Nestlen, M. (author), Dollard, G.J. (author), Davies, T.D.N. (author), Instituut voor Milieuwetenschappen TNO (author) report 1993
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- Instituut voor Milieuwetenschappen TNO (author), Deinum, G. (author), Bakker, D.J. (author), Duyzer, J.H. (author), Dick van den Hout, K. (author) report 1993
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Hoofdgroep Maatschappelijke Technologie TNO (author), Duyzer, J.H. (author), Verhagen, H.L.M. (author), Weststrate, J.H. (author), Bosveld, F.C. (author)The dry deposition flux of NH3 to coniferous forest was determined by the micrometeorological gradient method using a 36m high tower. Aerodynamic characteristics of the site were studied, using a second tower erected in the forest 100m from the first. Fluxes and gradients of heat and momentum measured on both towers indicated a fairly...article 1992
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- Instituut voor Milieu- en Energietechnologie TNO (author), Duyzer, J.H. (author) conference paper 1992
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- Duyzer, J.H. (author), Instituut voor Milieuwetenschappen TNO (author) conference paper 1991
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- Fowler, D. (author), Duyzer, J.H. (author), Meixner, F.X. (author), Dollard, G.J. (author), Instituut voor Milieuwetenschappen TNO (author) report 1991
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- Eerden, L.J.M. (author), Dueck, T.A. (author), Duyzer, J.H. (author), Instituut voor Milieuwetenschappen TNO (author) report 1990