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Surfatm-nh3: a Model Combining the Surface Energy Balance and Bi-directional Exchanges of Ammonia Applied at the Field Scale : Volume 6, Issue 1 (06/01/2009)

By Personne, E.

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Book Id: WPLBN0004005325
Format Type: PDF Article :
File Size: Pages 44
Reproduction Date: 2015

Title: Surfatm-nh3: a Model Combining the Surface Energy Balance and Bi-directional Exchanges of Ammonia Applied at the Field Scale : Volume 6, Issue 1 (06/01/2009)  
Author: Personne, E.
Volume: Vol. 6, Issue 1
Language: English
Subject: Science, Biogeosciences, Discussions
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Loubet, B., Herrmann, B., Mattsson, M., Nemitz, E., Personne, E., Schjoerring, J. K.,...Cellier, P. (2009). Surfatm-nh3: a Model Combining the Surface Energy Balance and Bi-directional Exchanges of Ammonia Applied at the Field Scale : Volume 6, Issue 1 (06/01/2009). Retrieved from

Description: UMR Environment et Grandes Cultures/INRA – AgroParisTech, 78 850 Thiverval Grignon, France. 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 climatic 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 soil 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.

SURFATM-NH3: a model combining the surface energy balance and bi-directional exchanges of ammonia applied at the field scale

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