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Evaluation of SO2 dry deposition over short vegetation in Portugal

Feliciano, MS; Pio, CA and Vermeulen, Alex LU (2001) In Atmospheric Environment 35(21). p.3633-3643
Abstract
SO2 dry deposition was studied over short vegetation, in Portugal, by means of the concentration gradient method. The experimental study involved one first phase of long-term measurements carried out in a grassland and, subsequently, a second period of several 1997 intensive field campaigns performed in three places representing different climate and surface conditions. Temporal and spatial patterns of dry deposition parameters show that downward fluxes of SO2 are by some extent affected by surface processes. Median R-c varied from 140 s cm(-1) to values around 200 s cm(-1), in a wide range of environmental conditions. Stomatal uptake is an important sink when vegetation is biologically active, but its contribution is effectively low when... (More)
SO2 dry deposition was studied over short vegetation, in Portugal, by means of the concentration gradient method. The experimental study involved one first phase of long-term measurements carried out in a grassland and, subsequently, a second period of several 1997 intensive field campaigns performed in three places representing different climate and surface conditions. Temporal and spatial patterns of dry deposition parameters show that downward fluxes of SO2 are by some extent affected by surface processes. Median R-c varied from 140 s cm(-1) to values around 200 s cm(-1), in a wide range of environmental conditions. Stomatal uptake is an important sink when vegetation is biologically active, but its contribution is effectively low when compared with non-stomatal mechanisms, especially when the surface is wet. Under dry conditions R-c increases by a factor of two, but SO2 deposition rates then still are significant. The parameterisation of the surface resistance for SO2 proved to be difficult, but V-d derived with the Erisman parameterisation (Erisman et al., atmos. Environ. 28 (16) (1994) 2595) compared best with measured values, at low time resolution scale and especially under moisture conditions. (C) 2001 Published by Elsevier Science Ltd. (Less)
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author
publishing date
type
Contribution to journal
publication status
published
subject
keywords
sulfur dioxide, dry deposition, vegetation, Portugal
in
Atmospheric Environment
volume
35
issue
21
pages
3633 - 3643
publisher
Elsevier
external identifiers
  • wos:000170002200009
  • scopus:0034742496
ISSN
1352-2310
DOI
10.1016/S1352-2310(00)00539-2
language
English
LU publication?
no
id
c26633ba-a33c-4d5a-8821-854eaca1cf54 (old id 4624077)
date added to LUP
2014-10-14 15:54:53
date last changed
2018-01-07 09:02:17
@article{c26633ba-a33c-4d5a-8821-854eaca1cf54,
  abstract     = {SO2 dry deposition was studied over short vegetation, in Portugal, by means of the concentration gradient method. The experimental study involved one first phase of long-term measurements carried out in a grassland and, subsequently, a second period of several 1997 intensive field campaigns performed in three places representing different climate and surface conditions. Temporal and spatial patterns of dry deposition parameters show that downward fluxes of SO2 are by some extent affected by surface processes. Median R-c varied from 140 s cm(-1) to values around 200 s cm(-1), in a wide range of environmental conditions. Stomatal uptake is an important sink when vegetation is biologically active, but its contribution is effectively low when compared with non-stomatal mechanisms, especially when the surface is wet. Under dry conditions R-c increases by a factor of two, but SO2 deposition rates then still are significant. The parameterisation of the surface resistance for SO2 proved to be difficult, but V-d derived with the Erisman parameterisation (Erisman et al., atmos. Environ. 28 (16) (1994) 2595) compared best with measured values, at low time resolution scale and especially under moisture conditions. (C) 2001 Published by Elsevier Science Ltd.},
  author       = {Feliciano, MS and Pio, CA and Vermeulen, Alex},
  issn         = {1352-2310},
  keyword      = {sulfur dioxide,dry deposition,vegetation,Portugal},
  language     = {eng},
  number       = {21},
  pages        = {3633--3643},
  publisher    = {Elsevier},
  series       = {Atmospheric Environment},
  title        = {Evaluation of SO2 dry deposition over short vegetation in Portugal},
  url          = {http://dx.doi.org/10.1016/S1352-2310(00)00539-2},
  volume       = {35},
  year         = {2001},
}