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Dynamics of ammonia exchange with cut grassland: Strategy and implementation of the GRAMINAE Integrated Experiment
Centre for Ecology and Hydrology, Edinburgh.
Centre for Ecology and Hydrology, Edinburgh.
Centre for Ecology and Hydrology, Edinburgh.
Centre for Ecology and Hydrology, Edinburgh.
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2009 (engelsk)Inngår i: Biogeosciences, ISSN 1726-4170, E-ISSN 1726-4189, Vol. 6, nr 3, s. 309-331Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

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 of different estimates of sensible and latent heat fluxes, as well as continuous-gradient and Relaxed Eddy Accumulation (REA) systems for NH3 fluxes. The prior analysis established the spatial and temporal design of the experiment, allowing significant synergy between these objectives. The measurements were made at 7 measurement locations, thereby quantifying horizontal and vertical profiles, and covered three phases: a) tall grass canopy prior to cutting (7 days), b) short grass after cutting (7 days) and c) re-growing sward following fertilization with ammonium nitrate (10 days). The sequential management treatments allowed comparison of sources-sinks, advection and aerosol interactions under a wide range of NH3 fluxes. This paper describes the experimental strategy and reports the grassland management history, soils, environmental conditions and air chemistry during the experiment, finally summarizing how the results are coordinated in the accompanying series of papers.

sted, utgiver, år, opplag, sider
Copernicus Publications (on behalf of the European Geosciences Union) , 2009. Vol. 6, nr 3, s. 309-331
Emneord [en]
Grassland, Ammonia exchange, GRAMINAE Integrated Experiment
HSV kategori
Identifikatorer
URN: urn:nbn:se:hh:diva-2625ISI: 000264741800001Scopus ID: 2-s2.0-77949650469Lokal ID: 2082/3027OAI: oai:DiVA.org:hh-2625DiVA, id: diva2:239843
Tilgjengelig fra: 2009-06-24 Laget: 2009-06-24 Sist oppdatert: 2017-12-13bibliografisk kontrollert

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