Fluxes of oxidised and reduced nitrogen above a mixed coniferous forest exposed to various nitrogen emission sources

Johan Neirynck; A Kowalski; A Carrara; Gerrit Genouw; P Berghmans; R Ceulemans

doi:10.1016/j.envpol.2006.12.029

Fluxes of oxidised and reduced nitrogen above a mixed coniferous forest exposed to various nitrogen emission sources

Johan Neirynck
, A Kowalski
, A Carrara
, Gerrit Genouw
, P Berghmans
, R Ceulemans

Research output: Contribution to journal › A1: Web of Science-article › peer-review

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Abstract

Concentrations of nitrogen gases (NH₃, NO₂, NO, HONO and HNO₃) and particles (pNH₄ and pNO₃) were measured over a mixed coniferous forest impacted by high nitrogen loads. Nitrogen dioxide (NO₂) represented the main nitrogen form, followed by nitric oxide (NO) and ammonia (NH₃). A combination of gradient method (NH₃ and NO_x) and resistance modelling techniques (HNO₃, HONO, pNH₄ and pNO₃) was used to calculate dry deposition of nitrogen compounds. Net flux of NH3 amounted to -64 ng N m^-2 s^-1 over the measuring period. Net fluxes of NO_x were upward (8.5 ng N m^-2 s^-1) with highest emission in the morning. Fluxes of other gases or aerosols substantially contributed to dry deposition. Total nitrogen deposition was estimated at -48 kg N ha^-1 yr^-1 and consisted for almost 80% of NH_x. Comparison of throughfall nitrogen with total deposition suggested substantial uptake of reduced N (-15 kg N ha^-1 yr^-1) within the canopy.

Reduced nitrogen was found to be the main contributor to total deposition which was predominantly governed by dry deposition.

Original language	English
Journal	Environmental Pollution
Volume	149
Issue number	1
Pages (from-to)	31-43
Number of pages	13
DOIs	https://doi.org/10.1016/j.envpol.2006.12.029
Publication status	Published - 2007

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Measuring tower
Neirynck, J. (Manager)
Research Institute for Nature and Forest
Facility/equipment: Facility › Single sited

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title = "Fluxes of oxidised and reduced nitrogen above a mixed coniferous forest exposed to various nitrogen emission sources",

abstract = "Concentrations of nitrogen gases (NH3, NO2, NO, HONO and HNO3) and particles (pNH4 and pNO3) were measured over a mixed coniferous forest impacted by high nitrogen loads. Nitrogen dioxide (NO2) represented the main nitrogen form, followed by nitric oxide (NO) and ammonia (NH3). A combination of gradient method (NH3 and NOx) and resistance modelling techniques (HNO3, HONO, pNH4 and pNO3) was used to calculate dry deposition of nitrogen compounds. Net flux of NH3 amounted to -64 ng N m-2 s-1 over the measuring period. Net fluxes of NOx were upward (8.5 ng N m-2 s-1) with highest emission in the morning. Fluxes of other gases or aerosols substantially contributed to dry deposition. Total nitrogen deposition was estimated at -48 kg N ha-1 yr-1 and consisted for almost 80\% of NHx. Comparison of throughfall nitrogen with total deposition suggested substantial uptake of reduced N (-15 kg N ha-1 yr-1) within the canopy. Reduced nitrogen was found to be the main contributor to total deposition which was predominantly governed by dry deposition.",

author = "Johan Neirynck and A Kowalski and A Carrara and Gerrit Genouw and P Berghmans and R Ceulemans",

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T1 - Fluxes of oxidised and reduced nitrogen above a mixed coniferous forest exposed to various nitrogen emission sources

AU - Neirynck, Johan

AU - Kowalski, A

AU - Carrara, A

AU - Genouw, Gerrit

AU - Berghmans, P

AU - Ceulemans, R

N1 - Publication Authorstring : Neirynck , J.; Kowalski, A.; Carrara, A.; Genouw, G.; Berghmans, P.; Ceulemans, R. Publication RefStringPartII : <i>Environmental Pollution 149(1)</i>: 31-43. <a href="http://dx.doi.org/10.1016/j.envpol.2006.12.029" target="_blank">dx.doi.org/10.1016/j.envpol.2006.12.029</a>

PY - 2007

Y1 - 2007

N2 - Concentrations of nitrogen gases (NH3, NO2, NO, HONO and HNO3) and particles (pNH4 and pNO3) were measured over a mixed coniferous forest impacted by high nitrogen loads. Nitrogen dioxide (NO2) represented the main nitrogen form, followed by nitric oxide (NO) and ammonia (NH3). A combination of gradient method (NH3 and NOx) and resistance modelling techniques (HNO3, HONO, pNH4 and pNO3) was used to calculate dry deposition of nitrogen compounds. Net flux of NH3 amounted to -64 ng N m-2 s-1 over the measuring period. Net fluxes of NOx were upward (8.5 ng N m-2 s-1) with highest emission in the morning. Fluxes of other gases or aerosols substantially contributed to dry deposition. Total nitrogen deposition was estimated at -48 kg N ha-1 yr-1 and consisted for almost 80% of NHx. Comparison of throughfall nitrogen with total deposition suggested substantial uptake of reduced N (-15 kg N ha-1 yr-1) within the canopy. Reduced nitrogen was found to be the main contributor to total deposition which was predominantly governed by dry deposition.

AB - Concentrations of nitrogen gases (NH3, NO2, NO, HONO and HNO3) and particles (pNH4 and pNO3) were measured over a mixed coniferous forest impacted by high nitrogen loads. Nitrogen dioxide (NO2) represented the main nitrogen form, followed by nitric oxide (NO) and ammonia (NH3). A combination of gradient method (NH3 and NOx) and resistance modelling techniques (HNO3, HONO, pNH4 and pNO3) was used to calculate dry deposition of nitrogen compounds. Net flux of NH3 amounted to -64 ng N m-2 s-1 over the measuring period. Net fluxes of NOx were upward (8.5 ng N m-2 s-1) with highest emission in the morning. Fluxes of other gases or aerosols substantially contributed to dry deposition. Total nitrogen deposition was estimated at -48 kg N ha-1 yr-1 and consisted for almost 80% of NHx. Comparison of throughfall nitrogen with total deposition suggested substantial uptake of reduced N (-15 kg N ha-1 yr-1) within the canopy. Reduced nitrogen was found to be the main contributor to total deposition which was predominantly governed by dry deposition.

U2 - 10.1016/j.envpol.2006.12.029

DO - 10.1016/j.envpol.2006.12.029

M3 - A1: Web of Science-article

VL - 149

SP - 31

EP - 43

JO - Environmental Pollution

JF - Environmental Pollution

IS - 1

ER -

Fluxes of oxidised and reduced nitrogen above a mixed coniferous forest exposed to various nitrogen emission sources

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