Title
Assessment of dry deposition fluxes of NH3 and NH4+ over natural terrains
Author
Duyzer, J.H.
Bouman, A.H.M.
van Aalst, R.M.
Diederen, H.S.M.A.
Hoofdgroep maatschappelijke technologie TNO
Publication year
1987
Abstract
The dry deposition velocity of NH_3 and NH^+_4 ions in particles was determined using the micrometeorological gradient method. The vertical concentration gradient of NH_3, necessary to calculate the flux, was measured using oxalic acid coated denuders. NH^+_4 ions were determined in the airstream leaving the denuders using impregnated filters. Measurements were performed indifferent seasons over mainly heather/purple moor grass vegetation and a pine plantation with 2.5 m high Corsican pine. NH_3 appears to deposit relatively fast an average deposition velocity over all location of 1.9 cm.s^-1 was observed in approximately 100 hourly observations. The influence
Subject
Emission
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http://resolver.tudelft.nl/uuid:ed162b07-b3eb-4e24-ae48-601079db7361
TNO identifier
533595
Report number
P 87 / 034
Publisher
TNO, Delft
Source
Presented at the EURASAP symposium : Ammonia and Acidification 13-15 April 1987, Bilthoven, The Netherlands
Document type
conference paper