Het Open Marien Archief van België (OMA) biedt vrije toegang tot de digitale publicaties over de Vlaamse kust en het Belgisch deel van de Noordzee, en alle andere mariene, estuariene en kustgebonden publicaties van Belgische auteurs en wetenschappers en van buitenlandse wetenschappers geaffilieerd aan een Belgische instelling.
|Atmospheric nitrogen fluxes at the Belgian coast: 2004-2006|
|Bencs, L.; Krata, A.; Horemans, B.; Buczynska, A.J.; Dirtu, A.C.; Godoi, A.F.L.; Godoi, R.H.M.; Potgieter-Vermaak, S.; Van Grieken, R. (2009). Atmospheric nitrogen fluxes at the Belgian coast: 2004-2006. Atmos. Environ. (1994) 43(24): 3786-3798. dx.doi.org/10.1016/j.atmosenv.2009.04.002|
|In: Atmospheric Environment (1994). Pergamon: Oxford. ISSN 1352-2310, meer|
Aerosols; Eutrophication; Gases; Inorganic compounds; Kusten; Nitrogen compounds; Opgelost organisch koolstof; Seizoenale variaties; ANE, België, Belgische kust [gazetteer]; ANE, North Sea [gazetteer]; Marien
|Auteurs|| || Top |
- Bencs, L., meer
- Krata, A., meer
- Horemans, B., meer
- Buczynska, A.J., meer
- Dirtu, A.C., meer
- Godoi, A.F.L., meer
- Godoi, R.H.M., meer
- Potgieter-Vermaak, S., meer
- Van Grieken, R., meer
Daily and seasonal variations in dry and wet atmospheric nitrogen fluxes have been studied during four campaigns between 2004 and 2006 at a coastal site of the Southern North Sea at De Haan (Belgium) located at coordinates of 51.1723° N and 3.0369°; E. Concentrations of inorganic N-compounds were determined in the gaseous phase, size-segregated aerosol (coarse, medium, and fine), and rainwater samples. Dissolved organic nitrogen (DON) was quantified in rainwater. The daily variations in N-fluxes of compounds were evaluated with air-mass backward trajectories, classified into the main air-masses arriving at the sampling site (i.e., continental, North Sea, and Atlantic/UK/Channel).
The three, non-episodic campaigns showed broadly consistent fluxes, but during the late summer campaign exceptionally high episodic N-deposition was observed. The average dry and wet fluxes for non-episodic campaigns amounted to 2.6 and4.0mg N m-2 d-1, respectively, whereas during the episodic late summer period these fluxes were as high as 5.2 and 6.2mg N m-2 d-1, respectively. Non-episodic seasons/campaigns experienced average aerosol fluxes of 0.9-1.4 mg N m d-1. Generally, the contribution of aerosol NH4+ was more significant in the medium and fine particulate fractions than that of aerosol NO3-, whereas the latter contributed more in the coarse fraction, especially in continental air-masses. During the dry mid-summer campaign, the DON contributed considerably (~15%) to the total N-budget.
Exceptionally high episodic aerosol-N inputs have been observed for the late summer campaign, with especially high deposition rates of 3.6 and 2.9 mg N m-2 d-1 for Atlantic/UK/Channel and North Sea-continental (mixed) air-masses, respectively. During this pollution episode, the flux of NH4+ was dominating in each aerosol fraction/air-mass, except for coarse continental aerosols. High deposition of gaseous-N was also observed in this campaign with an average total N-flux of 2-2.5-times higher than in other campaigns.