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| Titel |
Dynamics of ammonia exchange with cut grassland: strategy and implementation of the GRAMINAE Integrated Experiment |
| VerfasserIn |
M. A. Sutton, E. Nemitz, M. R. Theobald, C. Milford, J. R. Dorsey, M. W. Gallagher, A. Hensen, P. A. C. Jongejan, J. W. Erisman, M. Mattsson, J. K. Schjoerring, P. Cellier, B. Loubet, R. Roche, A. Neftel, B. Hermann, S. K. Jones, B. E. Lehman, L. Horvath, T. Weidinger, K. Rajkai, J. Burkhardt, F. J. Löpmeier, U. Daemmgen |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 6, no. 3 ; Nr. 6, no. 3 (2009-03-05), S.309-331 |
| Datensatznummer |
250003527
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| Publikation (Nr.) |
 copernicus.org/bg-6-309-2009.pdf |
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| Zusammenfassung |
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. |
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