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Fluxes of ammonia in the marine coastal boundary layer.

Sorensen, L L; Hertel, O; Skjoth, C A; Lund, Mikael LU and Pedersen, B (2003) In Atmospheric Environment 37(Supplement 1). p.167-177
Abstract
Concentrations of ammonia in air and ammonium in surface water were measured from a platform in the Southern North Sea close to the Dutch coast. Fluxes were derived from the measurements applying Monin–Obukhov similarity theory and exchange velocities calculated. The fluxes and air concentrations of ammonia were compared to results obtained from the Lagrangian transport-chemistry model ACDEP with and without a parameterisation of outgoing fluxes of ammonia from the sea. The results indicate that the flux may in fact be upward during periods with low atmospheric ammonia concentrations and that the calculated overall ammonia dry deposition may be overestimated by a factor two or more in the coastal region. A more detailed study is needed in... (More)
Concentrations of ammonia in air and ammonium in surface water were measured from a platform in the Southern North Sea close to the Dutch coast. Fluxes were derived from the measurements applying Monin–Obukhov similarity theory and exchange velocities calculated. The fluxes and air concentrations of ammonia were compared to results obtained from the Lagrangian transport-chemistry model ACDEP with and without a parameterisation of outgoing fluxes of ammonia from the sea. The results indicate that the flux may in fact be upward during periods with low atmospheric ammonia concentrations and that the calculated overall ammonia dry deposition may be overestimated by a factor two or more in the coastal region. A more detailed study is needed in order to quantify how this may influence overall deposition to given marine waters. In some cases the deposition may solely be redistributed whereas the total deposition is only marginally influenced (Less)
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author
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Surface exchange, Coastal zone, Ammonia fluxes, Reduced nitrogen, Flux divergence, Advection
in
Atmospheric Environment
volume
37
issue
Supplement 1
pages
167 - 177
publisher
Elsevier
external identifiers
  • scopus:0038488942
ISSN
1352-2310
DOI
10.1016/S1352-2310(03)00247-4
language
English
LU publication?
no
id
0f5daecb-647e-40f3-878d-6387249db635 (old id 128847)
date added to LUP
2007-07-17 14:14:10
date last changed
2018-10-07 04:15:47
@article{0f5daecb-647e-40f3-878d-6387249db635,
  abstract     = {Concentrations of ammonia in air and ammonium in surface water were measured from a platform in the Southern North Sea close to the Dutch coast. Fluxes were derived from the measurements applying Monin–Obukhov similarity theory and exchange velocities calculated. The fluxes and air concentrations of ammonia were compared to results obtained from the Lagrangian transport-chemistry model ACDEP with and without a parameterisation of outgoing fluxes of ammonia from the sea. The results indicate that the flux may in fact be upward during periods with low atmospheric ammonia concentrations and that the calculated overall ammonia dry deposition may be overestimated by a factor two or more in the coastal region. A more detailed study is needed in order to quantify how this may influence overall deposition to given marine waters. In some cases the deposition may solely be redistributed whereas the total deposition is only marginally influenced},
  author       = {Sorensen, L L and Hertel, O and Skjoth, C A and Lund, Mikael and Pedersen, B},
  issn         = {1352-2310},
  keyword      = {Surface exchange,Coastal zone,Ammonia fluxes,Reduced nitrogen,Flux divergence,Advection},
  language     = {eng},
  number       = {Supplement 1},
  pages        = {167--177},
  publisher    = {Elsevier},
  series       = {Atmospheric Environment},
  title        = {Fluxes of ammonia in the marine coastal boundary layer.},
  url          = {http://dx.doi.org/10.1016/S1352-2310(03)00247-4},
  volume       = {37},
  year         = {2003},
}