Biogeosciences www.biogeosciences.net 1726-4170 1726-4189 6 10 2009 10.5194/bg-6-1987-2009 http://www.biogeosciences.net/6/1987/2009/ http://www.biogeosciences.net/6/1987/2009/bg-6-1987-2009.html http://www.biogeosciences.net/6/1987/2009/bg-6-1987-2009.pdf 1987 1999 2009-10-02 Measurement and modelling ozone fluxes over a cut and fertilized grassland R. Mészáros mrobi@nimbus.elte.hu L. Horváth T. Weidinger A. Neftel E. Nemitz U. Dämmgen P. Cellier B. Loubet Department of Meteorology, Eötvös Loránd University, Pázmány Péter sétány 1/A, P.O. Box 32, 1518 Budapest, Hungary Hungarian Meteorological Service (HMS), Budapest, Hungary Institute of Environmental Protection and Agriculture, Zürich, Switzerland Centre for Ecology and Hydrology (CEH), Penicuik, Midlothian, UK Institute for Agroecology, Federal Agricultural Research Centre, Braunschweig, Germany National Institute for Agronomic Research (INRA), Thiverval-Grignon, France During the GRAMINAE Integrated Experiment between 20 May and 15 June 2000, the ozone flux was measured by the eddy covariance method above intensively managed grassland in Braunschweig, northern Germany. Three different phases of vegetation were covered during the measuring campaign: tall grass canopy before cut (29 May 2000), short grass after cut, and re-growing vegetation after fertilization (5 June 2000). Results show that beside weather conditions, the agricultural activities significantly influenced the O₃ fluxes. After the cut the daytime average of the deposition velocity (<i>v_d</i>) decreased from 0.44 cm s^&minus;1 to 0.26 cm s^&minus;1 and increased again to 0.32 cm s^&minus;1 during the third period. Detailed model calculations were carried out to estimate deposition velocity and ozone flux. The model captures the general diurnal patter of deposition, with <i>v_d</i> daytime values of 0.52, 0.24, and 0.35 cm s^&minus;1 in the first, second and third period, respectively. Thus the model predicts a stronger response to the cut than the measurements, which is nevertheless smaller than expected on the basis of change in leaf area. The results show that both cut and fertilization have complex impacts on fluxes. Reduction of vegetation by cutting decreased the stomatal flux initially greatly, but the stomatal flux recovered to 80% of its original value within a week. At the same time, the non-stomatal flux appears to have increased directly after the cut, which the model partially explains by an increase in the deposition to the soil. A missing sink after the cut may be the chemical interaction with biogenic volatile organic compounds released after the cut and exposed senescent plant parts, or the increase in soil NO emissions after fertilization. Increased canopy temperatures may also have promoted ozone destruction on leaf surfaces. These results demonstrate the importance of canopy structure and non-stomatal pathways on O₃ fluxes. Altimir, N., Kolari, P., Tuovinen, J.-P., Vesala, T., Bäck, J., Suni, T., Kulmala, M., and Hari, P.: Foliage surface ozone deposition: a role for surface moisture?, Biogeosciences, 3, 209–228, 2006. Ashmore, M. R., Büker, P., Emberson, L. D., Terry, A. C., and Toet, S.: Modelling stomatal ozone flux and deposition to grassland communities across Europe, Environ. Pollut. 146, 659–670, 2007. Bassin, S., Volk, M., and Fuhrer, J.: Factors affecting the ozone sensitivity of temperate European grasslands: an overview, Environ. Pollut., 146(3), 678–691, 2007. Burkhardt, J., Flechard, C. R., Gresens, F., Mattsson, M., Jongejan, P. A. C., Erisman, J. W., Weidinger, T., Meszaros, R., Nemitz, E., and Sutton, M. A.: Modelling the dynamic chemical interactions of atmospheric ammonia with leaf surface wetness in a managed grassland canopy, Biogeosciences, 6, 67–83, 2009. Cape, J. N., Hamilton, R., and Heal, M. R.: Reactive uptake of ozone at simulated leaf surfaces, Atmos. Environ., 43, 1116–1123, 2009. Cieslik, S. A.: Ozone uptake by varios surface types: a comparison between dose and exposure, Atmos. Environ., 38, 2409–2420, 2004. Coyle, M.: The gaseous exchange of ozone at terrestrial surfaces: non-stomatal deposition to grassland, Ph.D. thesis, University of Edinburgh, 311 pp., 2005. Crutzen, P. J., Lawrence, M. G., and Pöschl, U.: On the background photochemistry of tropospheric ozone, Tellus Series A – Dynamic Meteorology and Oceanography, 51, 123–146, 1999. Diem, J. E.: A critical examination of ozone mapping from a spatial-scale perspective, Environ. Pollut., 125, 369–383, 2003. Duyzer, J., Weststrate, H., Verhagen, H., Deinum, G., and Baak, J.: Measurements of dry deposition fluxes of nitrogen compounds and ozone, in: Biosphere-atmosphere exchange of pollutants and trace substances: Experimental and Theoretical Studies of Biogenic Emissions and Pollutant Deposition, edited by: Slanina, S., Springer, 4, 244–250, 1997. Emberson, L.: Air pollution impacts on crops and forests: An introduction. in: Air pollution impacts on crops and forests. A global assessment, edited by: Emberson, L., Ashmore, M., and Murray, F., Imperial College Press, London, 4, 3–29, 2003. Fowler, D., Flechard, C., Cape, J. N., Storeton-West, R. L., and Coyle, M.: Measurements of ozone deposition to vegetation quantifying the flux, the stomatal and non-stomatal components, Water Air Soil Pollut., 130, 63–74, 2001. Fuentes, J. D., Wang, D., Rowling, D. R., Potosnak, M., Monson, R. K., Goliff, W. S., and Stockwell, W. R.: Biogenic hydrocarbon chemistry within and above a mixed deciduous forest, J. Atmos. Chem., 56, 165–185, 2007. Goldstein, A. H., McKay, M., Kurpius, M. R., Schade, G. W., Lee, A., Holzinger, R., and Rasmussen, R. A.: Forest thinning experiment confirms ozone deposition to forest canopy is dominated by reaction with biogenic VOCs, Geophys. Res. Lett., 31, L22106, doi:10.1029/2004GL021259, 2004. Grünhage, L., Haenel, H. D., and Jäger, H. J.: The exchange of ozone between vegetation and atmosphere: micrometeorological measurement techniques and models, Environ. Pollut., 109, 373–392, 2000. Güsten, H., Heinrich, G., Mönnich, E., Sprung, D., Weppner, J., Ramadan, A. B., Ezz El-Din, M. R. M., Ahmed, D. M., and Hassan, G. K. Y.: On-line measurements of ozone surface fluxes: Part II. Surface-level ozone fluxes onto the Sahara desert, Atmos. Environ., 30, 911–918, 1996. Jäggi, M., Ammann, C., Neftel, A., and Fuhrer, J.: Environmental control of profiles of ozone concentration in a grassland canopy, Atmos. Environ., 40, 5496–5507, 2006. Kaimal, J. C. and Finnigan, J. J.: Atmospheric Boundary Layer Flows: Their Structure and Measurement, Oxford University Press US, 289 pp., 1994. Karl, T., Guenther, A., Jordan, A., Fall, R., and Lindinger, W.: Eddy covariance measurements of biogenic oxygenated VOC emissions from hay harvesting, Atmos. Environ., 35, 491–495, 2001. Kormann, R. and Meixner, F. X.: An analytical footprint model for non-neutral stratification, Bound.-Lay. Meteorol., 99, 207–224, 2001. Kurpius, M. R. and Goldstein, A. H.: Gas-phase chemistry dominates O₃ loss to a forest, implying a source of aerosols and hydroxyl radicals to the atmosphere, Geophys. Res. Lett., 30, 1371, doi:10.1029/2002GL016785, 2003. Leuning, R.: Source/sink distributions in plant canopies using Lagrangian dispersion analysis: corrections for atmospheric stability and comparison with a canopy model, Bound.-Lay. Meteorol., 96(1–2), 293–314, 2000. Massman, W. J.: A simple method for estimating frequency response corrections for eddy covariance systems, Agr. Forest Meteorol., 104, 185–198, 2000. Massman, W. J.: Toward an ozone standard to protect vegetation based on effective dose: a review of deposition resistances and a possible metric, Atmos. Environ., 38, 2323–2337, 2004. Mauder, M. and Foken, T.: Documentation and instruction manual of the eddy covariance software package TK2, Universität Bayreuth, 45 pp., 2004. McMillen, R. T.: An eddy correlation technique with extended applicability to non-simple terrain, Bound.-Lay. Meteorol., 43, 231–245, 1988. Mészáros, R., Zsély, I. Gy., Szinyei, D., Vincze, Cs., and Lagzi, I.: Sensitivity analysis of an ozone deposition model, Atmos. Environ., 43, 663–672, 2009. Meyers, T. P., Finkelstein, P., Clarke, J., Ellestad, T. G., and Sims, P. F.: A multilayer model for inferring dry deposition using standard meteorological measurements, J. Geophys. Res., 103, 22645–22661, 1998. Mikkelsen, T. N., Ro-Poulsen, H., Hovmad, M. F., Jensen, N. O., Pilegaard, K., and Egelov, A. H.: Five-year measurements of ozone fluxes to a Danish Norway spruce canopy, Atmos. Environ., 38, 2361–2371, 2004. Milford, C., Theobald, M. R., Nemitz, E., Hargreaves, K. J., Horvath, L., Raso, J., Dämmgen, U., Neftel, A., Jones, S. K., Hensen, A., Loubet, B., Cellier, P., and Sutton, M. A.: Ammonia fluxes in relation to cutting and fertilization of an intensively managed grassland derived from an inter-comparison of gradient measurements, Biogeosciences, 6, 819–834, 2009. Moore, C. J.: Frequency response corrections for eddy correlation systems, Bound.-Lay. Meteorol., 37, 17–35, 1986. Nemitz, E., Milford, C., and Sutton, M. A.: A two-layer canopy compensation point model for describing bi-directional biosphere-atmosphere exchange of ammonia, Q. J. Roy. Meteor. Soc., 127, 815–833, 2001. Nemitz, E., Hargreaves, K. J., Neftel, A., Loubet, B., Cellier, P., Dorsey, J. R., Flynn, M., Hensen, A., Weidinger, T., Meszaros, R., Horvath, L., Dämmgen, U., Frühauf, C., Löpmeier, F. J., Gallagher, M. W., and Sutton, M. A.: Intercomparison and assessment of turbulent and physiological exchange parameters of grassland, Biogeosciences, 6, 1445–1466, 2009a. Nemitz, E., Loubet, B., Lehmann, B. E., Cellier, P., Neftel, A., Jones, S. K., Hensen, A., Ihly, B., Tarakanov, S. V., and Sutton, M. A.: Turbulence characteristics in grassland canopies and implications for tracer transport, Biogeosciences, 6, 1519–1537, 2009b. NOAA: Manual of NOAA fast ozone sensor, NOAA Air Resources Laboratory, Atmospheric Turbulence and Diffusion Division, Oak Ridge, USA, 1996. Padro, J.: Summary of ozone dry deposition velocity measurements and model estimates over vineyard, cotton, grass and deciduous forest in summer, Atmos. Environ., 30, 2363–2369, 1996. Padro, J., Zhang, L., and Massman, W. J.: An analysis of measurements and modelling of air-surface exchange of NO-NO2-O3 over grass, Atmos. Environ., 32, 1365–1375, 1998. Pilegaard, K.: Air-soil exchange of NO, NO₂ and O₃ in forests, Water Air Soil Poll., 1, 79–88, 2001. Schotanus, P., Nieuwstadt, F. T. M., and DeBruin, H. A. R.: Temperature measurement with a sonic anemometer and its application to heat and moisture fluctuations, Bound.-Lay. Meteorol., 26, 81–93, 1983. Speuser, W., Sahand, S., and Schurath, U.: A novel fast response chemilumin-escence sonde for routine soundings of stratospheric ozone up to 1.5 mb, in: Ozone in the atmosphere, edited by: Bojkov, R. D. and Fabien, P., Deepak Publishing, 747–750, 1989. 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., and Daemmgen, U.: Dynamics of ammonia exchange with cut grassland: strategy and implementation of the GRAMINAE Integrated Experiment, Biogeosciences, 6, 309–331, 2009a. Sutton, M. A., Nemitz, E., Milford, C., Campbell, C., Erisman, J. W., Hensen, A., Cellier, P., David, M., Loubet, B., Personne, E., Schjoerring, J. K., Mattsson, M., Dorsey, J. R., Gallagher, M. W., Horvath, L., Weidinger, T., Meszaros, R., Dämmgen, U., Neftel, A., Herrmann, B., Lehman, B. E., Flechard, C., and Burkhardt, J.: Dynamics of ammonia exchange with cut grassland: synthesis of results and conclusions of the GRAMINAE Integrated Experiment, Biogeosciences Discuss., 6, 1121–1184, 2009b. Vingarzan, R.: A review of surface ozone background levels and trends, Atmos. Environ., 38, 3431–3442, 2004. Webb, E. K., Pearman, G. I., and Leuning, R.: Correction of flux measurements for density effects due to heat and water vapour transfer, Q. J. Roy. Meteor. Soc., 106, 85–100, 1980. Weidinger, T., &#x00C1;cs, F., Mészáros, R., and Barcza, Z.: Energy budget components in a forest clearcut: analysis of measurement results, Idõjárás, 103, 145–160, 1999. Weschler, C. J.: Ozone's Impact on Public Health: Contributions from Indoor Exposures to Ozone and Products of Ozone-Initiated Chemistry, Environ. Health Persp., 114, 1489–1496, 2006. Zhang, L., Moran, M. D., Makar, P. A., Brook, R., and Gong, S.: Modelling gaseous dry deposition in AURAMS: a unified regional air-quality modelling system, Atmos. Environ., 36, 537–560, 2002a. Zhang, L., Brook, J. R., and Vet, R.: On ozone dry deposition-with emphasis on non-stomatal uptake and wet canopies, Atmos. Environ., 36, 4787–4799, 2002b. Zhang, L., Brook, J. R., and Vet, R.: A revised parameterization for gaseous dry deposition in air-quality models, Atmos. Chem. Phys., 3, 2067–2082, 2003. Zhang, L., Vet, R., Brook, J. R., and Legge, A. H.: Factors affecting stomatal uptake of ozone by different canopies and a comparison between dose and exposure, Sci. Total Environ., 370, 117–132, 2006.