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Modelling the Dynamic Chemical Interactions of Atmospheric Ammonia with Leaf Surface Wetness in a Managed Grassland Canopy : Volume 6, Issue 1 (13/01/2009)

By Burkhardt, J.

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Book Id: WPLBN0004003885
Format Type: PDF Article :
File Size: Pages 18
Reproduction Date: 2015

Title: Modelling the Dynamic Chemical Interactions of Atmospheric Ammonia with Leaf Surface Wetness in a Managed Grassland Canopy : Volume 6, Issue 1 (13/01/2009)  
Author: Burkhardt, J.
Volume: Vol. 6, Issue 1
Language: English
Subject: Science, Biogeosciences
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
2009
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

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Erisman, J. W., Mattsson, M., Gresens, F., Nemitz, E., C. Jongeja, P. A., Burkhardt, J.,...Meszaros, R. (2009). Modelling the Dynamic Chemical Interactions of Atmospheric Ammonia with Leaf Surface Wetness in a Managed Grassland Canopy : Volume 6, Issue 1 (13/01/2009). Retrieved from http://www.ebooklibrary.org/


Description
Description: Institute for Crop Science and Resource Conservation, INRES-PE, University of Bonn, Karlrobert-Kreiten-Str. 13, 53115 Bonn, Germany. Ammonia exchange fluxes between grassland and the atmosphere were modelled on the basis of stomatal compensation points and leaf surface chemistry, and compared with measured fluxes during the GRAMINAE intensive measurement campaign in spring 2000 near Braunschweig, Germany. Leaf wetness and dew chemistry in grassland were measured together with ammonia fluxes and apoplastic NH4+ and H+ concentration, and the data were used to apply, validate and further develop an existing model of leaf surface chemistry and ammonia exchange. Foliar leaf wetness which is known to affect ammonia fluxes may be persistent after the end of rainfall, or sustained by recondensation of water vapour originating from the ground or leaf transpiration, so measured leaf wetness values were included in the model. pH and ammonium concentrations of dew samples collected from grass were compared to modelled values.

The measurement period was divided into three phases: a relatively wet phase followed by a dry phase in the first week before the grass was cut, and a second drier week after the cut. While the first two phases were mainly characterised by ammonia deposition and occasional short emission events, regular events of strong ammonia emissions were observed during the post-cut period. A single-layer resistance model including dynamic cuticular and stomatal exchange could describe the fluxes well before the cut, but after the cut the stomatal compensation points needed to numerically match measured fluxes were much higher than the ones measured by bioassays, suggesting another source of ammonia fluxes. Considerably better agreement both in the direction and the size range of fluxes were obtained when a second layer was introduced into the model, to account for the large additional ammonia source inherent in the leaf litter at the bottom of the grass canopy. Therefore, this was found to be a useful extension of the mechanistic dynamic chemistry model by keeping the advantage of requiring relatively little site-specific information.


Summary
Modelling the dynamic chemical interactions of atmospheric ammonia with leaf surface wetness in a managed grassland canopy

Excerpt
Adema, E. H. and Heeres, P.: Dry deposition of sulphur dioxide and ammonia on wet surfaces and the surface oxidation kinetics of bisulphite, Atmos. Environ., 29, 1091–1103, 1995.; Altimir, N., Kolari, P., Tuovinen, J.-P., Vesala, T., Bäck, J., Suni, T., Kulmala, M., and Hari, P., Biogeosciences, 3, 209–228, 2006.; Andrews, J. H. and Harris, R. F.: The ecology and biogeography of microorganisms on plant surfaces, Annu. Rev. Phytopathol., 38, 145–180, 2000.; Barfield, B. J., Payne, F. A., and Walker, J. N.: Surface water storage capacity of selected crop leaves under irrigation sprays, Agr. Meteorol., 12, 105–111, 1973.; Beysens, D., Ohayonc, C., Muselli, M., and Clus, O.: Chemical and biological characteristics of dew and rain water in an urban coastal area (Bordeaux, France), Atmos. Environ., 40, 3710–3723, 2006.; Brunauer, S., Emmett, P. H., and Teller, E.: Adsorption of gases in multimolecular layers, J. Am. Chem. Soc., 60, 309–19, 1938.; Burkhardt, J. and Eiden, R.: Thin water films on coniferous needles, Atmos. Environ., 28, 2001–2011, 1994.; Burkhardt, J. and Drechsel P.: The synergism between SO2 oxidation and manganese leaching on spruce needles – A chamber experiment, Environ. Pollut., 95, 1–11, 1997.; Burkhardt, J. and Eiden, R.: The ion concentration of dew condensed on Norway spruce (Picea abies (L.) Karst.) and Scots pine (Pinus sylvestris L.), Trees, 4, 22–26, 1990.; Burkhardt, J. and Gerchau, J.: A new device for the study of water-vapor condensation and gaseous deposition to plant-surfaces and particle samples, Atmos. Environ., 28, 2012–2017, 1994.; Burkhardt, J., Kaiser, H., Goldbach, H., and Kappen, L.: Measurements of electrical leaf surface conductance reveal recondensation of transpired water vapour on leaf surfaces, Plant Cell Environ., 22, 189–196, 1999.; Chelle, M.: Phylloclimate or the climate perceived by individual plant organs: What is it? How to model it? What for?, New Phytol., 166, 781–790, 2005.; Clegg, S. L., Brimblecombe, P., and Wexler, A. S.: A thermodynamic model of the system H$^+$-NH$_4^+$-Na$^+$-SO$_4^2-$-NO$_3^-$-Cl$^-$-H2O at 298.15 K, J. Phys. Chem. A., 102, 2155–2171, http://www.aim.env.uea.ac.uk/aim/aim.php, 1998.; Denmead, O. T., Freney, J. R., and Simpson, J. R.: Closed ammonia cycle within a plant canopy, Soil Biol. Biochem., 8, 161–164, 1976.; David, M., Loubet, B., Cellier, P., Mattsson, M., Nemitz, E., Roche, R., Riedo, M., Schjoerring, J. K., and Sutton, M. A.: Analysis of ammonia fluxes with intensively managed grassland using dynamic chambers. I. Sources and sinks of ammonia at canopy level, Biogeoscience Discuss., submitted, 2008.; Erisman, J. W. and Wyers, G. P.: Continuous measurements of surface exchange of SO2 and NH3 – implications for their possible interaction in the deposition process, Atmos. Environ. A-Gen., 27, 1937–1949, 1993.; Flechard, C. R.: Turbulent exchange of ammonia above vegetation, Ph.D. thesis, University of Nottingham, UK, 231 pp., 1998.; Flechard, C. R., Fowler, D., Sutton, M. A., and Cape, J. N.: A dynamic chemical model of bi-directional ammonia exchange between semi-natural vegetation and the atmosphere, Q. J. Roy. Meteor. Soc., 125, 2611–2641, 1999.; Herrmann, B., Mattsson, M., Jones, S., Cellier, P., Milford, C., Sutton, M. A., Schjoerring, J. K., and Neftel, A.: Vertical structure and diurnal variability of ammonia exchange potential within an intensively managed grass canopy, Biogeosciences, 6, 15–23, 2008.; Huber, L. and Gillespie, T. J.: Modeling leaf wetness in relation to plant disease epidemiology, Annu. Rev. Phytopathol, 30, 553–577, 1992.; Hughes, R. N. and Brimblecombe, P.: Dew and guttation – formation and environmental significance, Agr. Forest Meteorol., 67, 173–190, 1994.; Lindow, S. E. and Brandl, M. T.: Microbiology of the phyllosphere, Appl. Environ. Microbiol., 69, 1875–1883, 2003.; Long, I. F.: Some observations on dew, Meteorol. Mag.


 

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