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Ammonia fluxes in relation to cutting and fertilization of an intensively managed grassland derived from an inter-comparison of gradient measurements

Milford, C.; Theobald, M. R.; Nemitz, E.; Hargreaves, K. J.; Horvath, L.; Raso, J.; Dammgen, U.; Neftel, A.; Jones, S. K.; Henson, A.; Loubet, B.; Cellier, P.; Sutton, M. A.. 2008 Ammonia fluxes in relation to cutting and fertilization of an intensively managed grassland derived from an inter-comparison of gradient measurements. Biogeosciences Discuss, 5. 4699-4744.

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Abstract/Summary

Quantification of ammonia (NH3) land-atmosphere exchange is required for atmospheric modelling and assessment of nitrogen deposition, yet flux measurement methods remain highly uncertain. To address this issue, a major inter-comparison of ammonia fluxes over intensively managed grassland was conducted during the GRAMINAE Integrated Experiment held in Braunschweig, Germany. In order to provide a robust dataset of ammonia exchange with the vegetation, four independent continuous flux gradient systems were operated. Three independently operated continuous wet denuders systems (AMANDA) were compared with a Wet Effluent Diffusion Denuder (mini-WEDD) system. Measurements were made at two distances from an adjacent livestock farm, allowing effects of advection to be quantified in a real landscape setting. Data treatment included filtering for instrument failure, disturbed wind sectors and unsuitable micrometeorological conditions, with corrections made for storage and advection errors.

Item Type: Publication - Article
Programmes: CEH Programmes pre-2009 publications > Biogeochemistry > BG01 Measuring and modelling trace gas, aerosol and carbon > BG01.1 UK nitrogen and sulphur compounds
CEH Programmes pre-2009 publications > Biogeochemistry > BG01 Measuring and modelling trace gas, aerosol and carbon > BG01.3 Nitroeurope NEU advanced flux network, fluxes pools and budgets
CEH Sections: Billett (to 30 Nov 2013)
Additional Information. Not used in RCUK Gateway to Research.: Biogeosciences Discussions is an Open Access Journal
NORA Subject Terms: Atmospheric Sciences
Date made live: 18 Feb 2009 13:22
URI: http://nora.nerc.ac.uk/id/eprint/5525

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