Bidirectional ammonia exchange above a mixed coniferous forest

Onderzoeksoutput: Bijdrage aan tijdschriftA1: Web of Science-artikel



Originele taal-2Engels
TijdschriftEnvironmental Pollution
Tijschrift nummer3
Pagina's (van-tot)424-438
Aantal pagina's15
StatusGepubliceerd - 2008

Bibliografische nota

Publication Authorstring : Neirynck , J.; Ceulemans, R.
Publication RefStringPartII : <i>Environmental Pollution 154(3)</i>: 424-438


Two canopy compensation point models were used to study the bidirectional exchange of ammonia over a mixed coniferous forest subjected to high nitrogen deposition. The models were tested for 16 time series, average fluxes of which ranged between -270 and +1 ngm-2s-1. The static model consisted of a bidirectional stomatal flux and a unidirectional cuticular flux component. The dynamic model also allowed for desorption of ammonia from the leaf surface and took into account ammonia fluxes from precedent periods. The apoplastic ammonium/hydrogen ion ratio (Γ), which was derived to estimate the stomatal compensation point (Χs), amounted to 3300 in spring and 1375 during the summer/autumn. Empirical descriptions for cuticular resistances (Rw) in the static model, developed as a function of micrometeorological conditions and codeposition effects, failed to reproduce the measured fluxes. A better match with measurements was obtained using the dynamic model, which succeeded in simulating net-emission during the daytime.

Thematische lijst

EWI Biomedische wetenschappen

Toevoegen aan winkelwagen Opgeslagen in winkelwagen

Kopieer de tekst uit dit veld...



  • Neirynck_Ceulemans_2008_EnvironPollut

    !!Final published version, 1,21 MB, PDF-document


Bekijk grafiek van relaties