Search Results - "Otjes, R.P"

The continuous analysis of nitrate and ammonium in aerosols by the steam jet aerosol collector (SJAC): extension and validation of the methodology by Slanina, J., ten Brink, H.M., Otjes, R.P., Even, A., Jongejan, P., Khlystov, A., Waijers-Ijpelaan, A., Hu, M., Lu, Y.

“…Classical methodology based on the application of filters for sampling, followed by extraction and analysis, introduces severe artifacts for semi-volatile…”
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Assessment of air quality microsensors versus reference methods: The EuNetAir joint exercise by Borrego, C., Costa, A.M., Ginja, J., Amorim, M., Coutinho, M., Karatzas, K., Sioumis, Th, Katsifarakis, N., Konstantinidis, K., De Vito, S., Esposito, E., Smith, P., André, N., Gérard, P., Francis, L.A., Castell, N., Schneider, P., Viana, M., Minguillón, M.C., Reimringer, W., Otjes, R.P., von Sicard, O., Pohle, R., Elen, B., Suriano, D., Pfister, V., Prato, M., Dipinto, S., Penza, M.

“…The 1st EuNetAir Air Quality Joint Intercomparison Exercise organized in Aveiro (Portugal) from 13th–27th October 2014, focused on the evaluation and…”
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Assessment of air quality microsensors versus reference methods: The EuNetAir Joint Exercise – Part II by Borrego, C., Ginja, J., Coutinho, M., Ribeiro, C., Karatzas, K., Sioumis, Th, Katsifarakis, N., Konstantinidis, K., De Vito, S., Esposito, E., Salvato, M., Smith, P., André, N., Gérard, P., Francis, L.A., Castell, N., Schneider, P., Viana, M., Minguillón, M.C., Reimringer, W., Otjes, R.P., von Sicard, O., Pohle, R., Elen, B., Suriano, D., Pfister, V., Prato, M., Dipinto, S., Penza, M.

“…The EuNetAir Joint Exercise focused on the evaluation and assessment of environmental gaseous, particulate matter (PM) and meteorological microsensors versus…”
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Ammonia fluxes and derived canopy compensation points over non-fertilized agricultural grassland in The Netherlands using the new gradient ammonia—high accuracy—monitor (GRAHAM) by Wichink Kruit, R.J. (Roy), van Pul, W.A.J., Otjes, R.P., Hofschreuder, P., Jacobs, A.F.G., Holtslag, A.A.M.

“…During a measurement period from June till November 2004, ammonia fluxes above non-fertilized managed grassland in The Netherlands were measured with a…”
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Inter-comparison of ammonia fluxes obtained using the Relaxed Eddy Accumulation technique by Hensen, A., Nemitz, E., Flynn, M. J., Blatter, A., Jones, S. K., Sørensen, L. L., Hensen, B., Pryor, S. C., Jensen, B., Otjes, R. P., Cobussen, J., Loubet, B., Erisman, J. W., Gallagher, M. W., Neftel, A., Sutton, M. A.

“…The exchange of Ammonia (NH3) between grassland and the atmosphere was determined using Relaxed Eddy Accumulation (REA) measurements. The use of REA is of…”
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Miniaturized measurement system for ammonia in air by Timmer, B.H., van Delft, K.M., Otjes, R.P., Olthuis, W., van den Berg, A.

“…The development of a miniaturized ammonia sensor made using microsystem technology is described. Gas is sampled in a sampler comprising two opposite channels…”
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Micrometeorological measurements of net ammonia fluxes over oilseed rape during two vegetation periods by Sutton, M.A, Nemitz, E, Milford, C, Fowler, D, Moreno, J, San José, R, Wyers, G.P, Otjes, R.P, Harrison, R, Husted, S, Schjoerring, J.K

“…Ammonia fluxes were measured semi-continuously over oilseed rape ( Brassica napus) as part of the EXAMINE North Berwick experiment during ripening of the…”
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Fluxes of ammonia over oilseed rape: Overview of the EXAMINE experiment by Sutton, M.A, Nemitz, E, Fowler, D, Wyers, G.P, Otjes, R.P, Schjoerring, J.K, Husted, S, Nielsen, K.H, San José, R, Moreno, J, Gallagher, M.W, Gut, A

“…An integrated field experiment was organized as part of the EC EXAMINE project to quantify surface–atmosphere fluxes of ammonia (NH 3). Fluxes of NH 3, NH 4 +…”
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Investigations into vertical gradients of the gas-aerosol phase equilibrium NH 3(g)−NH 4+(s,aq) above vegetative surfaces by Nemitz, E., Sutton, M.A., Choularton, T.W., Wyers, P.G., Otjes, R.P.

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Fluxes of ammonia over oilseed rape by Sutton, M.A, Nemitz, E, Fowler, D, Wyers, G.P, Otjes, R.P, Schjoerring, J.K, Husted, S, Nielsen, K.H, San José, R, Moreno, J, Gallagher, M.W, Gut, A

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AN INSTRUMENT FOR SEMI-CONTINUOUS MEASUREMENT OF THE COMPOSITION OF ATMOSPHERIC AEROSOL AS A FUNCTION OF SIZE by EVEN, A., OTJES, R.P., VAN DEN BULK, W.C.M., WEIJERS, E.P., TEN BRINK, H.M., SLANINA, J.

“…The possibility to monitor on an hourly basis the chemical composition of aerosols as a function of size will enable better assessment of sources and impact of…”
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A droplet tunnel sampler with on-line ion analysis by Ten Brink, H.M., Stegeman, G., Otjes, R.P., Hofschreuder, P.

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Investigations into vertical gradients of the gas-aerosol phase equilibrium NH3(g)−NH4+(s,aq) above vegetative surfaces by Nemitz, E., Sutton, M.A., Choularton, T.W., Wyers, P.G., Otjes, R.P.

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Evaluation of automatic ammonia monitors for application in an air quality monitoring network by Mennen, M.G., Van Elzakker, B.G., Van Putten, E.M., Uiterwijk, J.W., Regts, T.A., Van Hellemond, J., Wyers, G.P., Otjes, R.P., Verhage, A.J.L., Wouters, L.W., Heffels, C.J.G., Romer, F.G., Van Den Beld, L., Tetteroo, J.E.H.

“…Six automatic ammonia analyzers were studied both in the field and in an environmental test chamber, on their suitability for the Netherlands National Air…”
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Non-intrusive, fast and sensitive ammonia detection by laser photothermal deflection by De Vries, H.S.M., Harren, F.J.M., Wyers, G.P., Otjes, R.P., Slanina, J., Reuss, J.

“…A recently developed non-intrusive photothermal deflection (PTD) instrument allows sensitive, rapid and quantitative detection of local ammonia concentrations…”
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Field investigations into the potential influence of ammonia and acidic gases on concentrations and surface - atmosphere exchange of aerosols by Nemitz, E., Sutton, M.A., Choularton, T.W., Wyers, G.P., Otjes, R.P., Møls, J.J., Mennen, M.G., van Putten, E.M., van Hellemond, J.

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Monitoring dry deposition of gases and particles over a forest by Mennen, M.G., van Putten, E.M., Uiterwijk, J.W., Hogenkamp, J.E.M., Wiese, C.J., Draaijers, G., Erisman, J.W., Otjes, R.P., Wyers, G.P.

“…Dry deposition fluxes of acidifying and eutrophying compounds are continuously determined at Speulder forest, a Douglas fir site in the centre of the…”
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