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A method for measuring the settling velocity distribution of large biotic particles Inra
Loubet, B.; Jarosz, N.; Saint-Jean, S.; Huber, L..
A simple method for measuring the settling velocity (V s) distribution of pollen and spores 30–100 μm in diameter is detailed and evaluated. The method is called the ‘settling tower' and consists in taking sequential pictures of particles falling under gravity in calm air. The scene is illuminated by a cold light source, while a camera takes 15 pictures per second. Between 20,000 and 100,000 images are analysed to obtain the distribution of V s for a given set of particles. The method was validated using two standard particles with mean diameters of 68 and 108 μm, respectively, as well as Lycopodium spores, with a mean diameter of 35 μm. For each set of particles, the theoretical V s distribution was estimated from the particle diameter distribution and...
Tipo: Journal Article Palavras-chave: VITESSE DE CHUTE; SPORE; PARTICULE BIOTIQUE; GRAVITE; ANALYSE D'IMAGE FALLING SPEED; LYCOPODIUM SPORES; MAIZE POLLEN; PARTICLE STANDARDS; PARTICLE TRACKING.
Ano: 2007 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2007c5ea4574&uri=/notices/prodinra1/2010/09/
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Dynamics of ammonia exchange with cut grassland: strategy and implementation of the GRAMINAE Integrated Experiment Inra
Sutton, M.A.; Nemitz, E.; Theobald, M.R.; Milford, C.; Dorsey, J.R.; Gallagher, M.W.; Hensen, A.; Jongejan, P.A.C.; Erisman, J.W.; Mattsson, M.; Schjoerring, J.K.; Cellier, P.; Loubet, B.; Roche, R.; Neftel, A.; Hermann, B.; Jones, S.K.; Lehman, B.E.; Horvath, L.; Weidinger, T.; Rajkai, K.; Burkhardt, J.; Löpmeier, F.J.; Daemmgen, U..
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 allow an integrated analysis of different features of NH3 exchange including: a) quantification of nearby emissions and advection effects, b) estimation of net NH3 fluxes with the canopy by a range of micrometeorological measurements, c) analysis of the sources and sinks of NH3 within the plant canopy, including soils and bioassay measurements, d) comparison of the effects of grassland management options on NH3 fluxes and e) assessment of the interactions of NH3 fluxes with aerosol exchange processes. Additional technical objectives included the inter-comparison...
Tipo: Journal Article Palavras-chave: EXPERIMENTATION GRAMINAE; CHIMIE ATMOSPHERIQUE; ECHANGE BIOSPHERE-ATMOSPHERE; AEROSOL; FERTILISATION AZOTEE; NITRATE D'AMMONIUM.
Ano: 2009 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2009a076f178&uri=/notices/prodinra1/2011/04/
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Estimation of NH3 emissions from a naturally ventilated livestock farm using local-scale atmospheric dispersion modelling Inra
Hensen, A.; Loubet, B.; Mosquera, J.; Van der Bulk, W.C.M.; Erisman, J.W.; Dämmgen, U.; Milford, C.; Löpmeier, F.J.; Cellier, P.; Mikuska, P.; Sutton, M.A..
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 policies, robust estimates of the emissions from the main sources, i.e. livestock farms are needed. In this paper, the NH3 emissions were estimated from a naturally ventilated livestock farm in Braunschweig, Germany during a joint field experiment of the GRAMINAE European project. An inference method was used with a Gaussian-3D plume model and with the Huang 3-D model. NH3 concentrations downwind of the source were used together with micrometeorological data to estimate the source strength over time. Mobile NH3 concentration measurements provided information on...
Tipo: Journal Article Palavras-chave: AMMONIAC; DEPOT; MODELE DE DISPERSION; EXPERIMENTATION GRAMINAE; MEASURING AMMONIA EMISSION; DISTRIBUTED AGRICULTURAL SOURCES; MANURE STORES; PART 2; DRY DEPOSITION; EXCHANGE MODEL; BUILDINGS; GRASSLAND; TURBULENT; VALIDATION.
Ano: 2009 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2010198e636b&uri=/notices/prodinra1/2011/05/
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Modélisation du dépôt sec d'ammoniac atmosphérique à proximité des sources Inra
Loubet, B..
Tipo: Thesis Palavras-chave: DEPOT; MODELE LAGRANGIEN; DISPERSION; ABSORPTION FOLIAIRE; CUTICULE; STOMATE; ECHELLE LOCALE; CULTURE; POLLUANT ATMOSPHERIQUE; EFFLUENT GAZEUX; MODELE DE SIMULATION; POLLUTION PAR L'AGRICULTURE.
Ano: 2000 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PUB0100021904088007&uri=/notices/prodinra1/2010/06/
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Vulnerability to ozone in anthropized ecosystems. Improvement of the threshold for risk assessment (VULNOZ project) Inra
Dizengremel, P.; Jolivet, Y.; Le Thiec, D.; Bethenod, O.; Castell, J.F.; Loubet, B.; Roche, R.; Repellin, A.; Noctor, G.; Lamaud, E..
Tipo: Meeting Paper Palavras-chave: OZONE.
Ano: 2010 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD201144217393&uri=/notices/prodinra1/2011/06/
Registros recuperados: 5
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