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SURFATM-NH3: a model combining the surface energy balance and bi-directional exchanges of ammonia applied at the field scale
UMR Environment et Grandes Cultures/INRA – AgroParisTech, 78850 Thiverval Grignon, France.
UMR Environment et Grandes Cultures/INRA – AgroParisTech, 78850 Thiverval Grignon, France.
Agroscope Reckenholz-Tänikon Research Station ART, Reckenholzstrasse 191, 8046 Zürich, Switzerland.
Plant and Soil Science Laboratory, University of Copenhagen, Faculty of Life Sciences, Thorvaldsensvej 40, 1871 Frederiksberg C, Copenhagen, Denmark.ORCID iD: 0000-0001-9157-7400
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2009 (English)In: Biogeosciences, ISSN 1726-4170, E-ISSN 1726-4189, Vol. 6, no 8, 1371-1388 p.Article in journal (Refereed) Published
Abstract [en]

A new biophysical model SURFATM-NH3, simulating the ammonia (NH3) exchange between terrestrial ecosystems and the atmosphere is presented. SURFATM-NH3 consists of two coupled models: (i) an energy budget model and (ii) a pollutant exchange model, which distinguish the soil and plant exchange processes. The model describes the exchanges in terms of adsorption to leaf cuticles and bi-directional transport through leaf stomata and soil. The results of the model are compared with the flux measurements over grassland during the GRAMINAE Integrated Experiment at Braunschweig, Germany. The dataset of GRAMINAE allows the model to be tested in various meteorological and agronomic conditions: prior to cutting, after cutting and then after the application of mineral fertilizer. The whole comparison shows close agreement between model and measurements for energy budget and ammonia fluxes. The major controls on the ground and plant emission potential are the physicochemical parameters for liquid-gas exchanges which are integrated in the compensation points for live leaves, litter and the soil surface. Modelled fluxes are highly sensitive to soil and plant surface temperatures, highlighting the importance of accurate estimates of these terms. The model suggests that the net flux depends not only on the foliar (stomatal) compensation point but also that of leaf litter. SURFATM-NH3 represents a comprehensive approach to studying pollutant exchanges and its link with plant and soil functioning. It also provides a simplified generalised approach (SVAT model) applicable for atmospheric transport models.

Place, publisher, year, edition, pages
Göttingen, Germany: Copernicus Publications , 2009. Vol. 6, no 8, 1371-1388 p.
Keyword [en]
Ammonia exchange, field scale, model, terrestrial ecosystem, atmosphere
National Category
Agricultural Sciences
Identifiers
URN: urn:nbn:se:hh:diva-16240DOI: 10.5194/bg-6-1371-2009ISI: 000269405000002Scopus ID: 2-s2.0-72049111044OAI: oai:DiVA.org:hh-16240DiVA: diva2:441187
Available from: 2011-09-15 Created: 2011-09-14 Last updated: 2017-12-08Bibliographically approved

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