A Model for Uptake of Pollutants by Vegetation

O'Dell, Robert A.; Mohebbi, Ali; Kabel, Robert L.

doi:10.1080/00022470.1977.10470533

Cited by 70 publications

(28 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Based upon the analogue resistance approach, introduced by Gaastra (1959) to describe the uptake of CO 2 and since adapted to describe the¯ux of various pollutants to the mesophyll (O'Dell et al 1977;Taylor et al 1982), O 3 uptake can be described as a series of diusional resistances: (i) laminar boundary layer (R 0 ); (ii) stomatal aperture (R 1 ); (iii) gas/aqueous interface at the mesophyll cell wall (R 2 ); (iv) the plasmalemma (R 3 ). In addition, the uptake of O 3 is modi®ed by reactive absorption (Van der Vliet et al 1995).…”

Section: Model Descriptionmentioning

confidence: 99%

Simulating ozone detoxification in the leaf apoplast through the direct reaction with ascorbate

Plöchl

Lyons

Ollerenshaw

et al. 2000

Planta

125

View full text Add to dashboard Cite

This paper presents a mathematical model which enables the semi-quantification of ozone (O3) detoxification, based upon the direct reaction of the pollutant with ascorbate (ASC) located in the aqueous matrix associated with the cell wall (i.e. the apoplast). The model describes the uptake of ozone into the leaf and its direct reaction with ASC, taking into consideration the regeneration of dehydroascorbic acid in the cytosol, the rate of replenishment of cell wall ASC and the distribution of ASC between sub-cellular compartments based upon the permeability of biomembranes to the neutral species, ascorbic acid and the pH of various sub-cellular compartments. The importance of various physico-chemical characteristics (e.g. stomatal conductance, mesophyll cell wall thickness and tortuosity, chloroplast volume, apoplast pH, ASC:O3 reaction stoichiometry) in mediating the flux of ozone to the plasmalemma is analysed. Model simulations, supported by experimental observations, suggest that the ASC concentration in the leaf apoplast is high enough to scavenge a significant proportion of the O3 taken up into the leaf interior, under environmentally relevant conditions. However, there is considerable variation between taxa in the potential degree of protection afforded by apoplastic ASC, emphasizing the need for an improved understanding of the reaction chemistry of O3 in the cell wall.

show abstract

Section: Model Descriptionmentioning

confidence: 99%

Simulating ozone detoxification in the leaf apoplast through the direct reaction with ascorbate

Plöchl

Lyons

Ollerenshaw

et al. 2000

Planta

125

View full text Add to dashboard Cite

show abstract

“…Figure 1 illustrates the components of a multiple-resistance model, similar to that used by many workers (e.g. O'Dell et al, 1977) to combine separate formulations of meteorological, chemical and biological processes in order to relate atmospheric fluxes to concentrations in air near the surface, Ca. The diagram illustrates some of the pathways associated with transfer to a forest canopy, with separate resistances associated with transfer through the air Ra, Fig.…”

Section: Introductionmentioning

confidence: 99%

Combining biology, chemistry, and meteorology in modeling and measuring dry deposition

Hicks

Matt

1988

J Atmos Chem

View full text Add to dashboard Cite

The range of chemical, biological, and meteorological processes contributing to the net exchange of trace chemical species between the atmosphere and the underlying surface is examined, in the context of a multiple-resistance exchange model. For those chemical species known to be always depositing, the resistance model provides a means to formulate appropriate deposition velocities in a convenient manner; however, extension to other situations is not straightforward. Field data indicate that the multiple-resistance approach is appropriate for application to assess the dry deposition of ozone and sulfur dioxide, but is not as appropriate for nitrogen dioxide. Data obtained over agricultural crops suggest that canopy factors frequently dominate the overall exchange process. A trial program of dry deposition measurement based on application of parameterized deposition velocities was initiated late in 1984, and has demonstrated shortcomings in understanding concerning several factors, most importantly the roles of surface emissions and wetness, and the scaling-up of laboratory results to describe vegetative canopies.

show abstract

“…A large number of "eld studies have been performed in the past concerning the dry deposition of ozone, principally in the United States and northern European regions (O'Dell et al, 1977;Wesely et al, 1978;Leuning et al, 1979;Galbally and Roy, 1980;Delany et al, 1986;Padro et al, 1991;van Pul, 1992). These experimental data have served as a basis for the development of parameterisation schemes used in atmospheric models to describe ozone dry deposition mechanisms.…”

Section: Introductionmentioning

confidence: 99%

Seasonal variability of ozone dry deposition under southern European climate conditions, in Portugal

Pio

Feliciano

Vermeulen

et al. 2000

Atmospheric Environment

View full text Add to dashboard Cite

Ozone dry deposition measurements were carried out during approximately one year over a #at grass "eld in Portugal. The results show prominent diurnal and seasonal patterns in deposition #ux, dry deposition velocity and surface resistance, especially for the daytime period. Dry deposition velocities vary diurnally from a minimum of 0.1 cm s\ , during the night to a maximum of 0.2}0.5 cm s\ during the day. The observed canopy resistance (R ) varies from values higher than 500 s m\ , at night, to a minimum of 200 s m\ , around noon. Seasonal variation is characterised by daytime R values much larger in summer than in winter and spring, while nighttime values do not show any evident seasonal pattern. This behaviour can be ascribed to the stomatal intake, which represents the most important controlling factor on ozone dry deposition. The Wesely parameterisation scheme of surface resistance predicts R diurnal cycles reasonably well. However, the observed canopy resistance seasonal cycle is completely di!erent from Wesely predictions, since season parameters in Wesely's parameterisation were de"ned for a vegetation growing cycle di!erent from that prevailing in our conditions.

show abstract

A Model for Uptake of Pollutants by Vegetation

Cited by 70 publications

References 17 publications

Simulating ozone detoxification in the leaf apoplast through the direct reaction with ascorbate

Simulating ozone detoxification in the leaf apoplast through the direct reaction with ascorbate

Combining biology, chemistry, and meteorology in modeling and measuring dry deposition

Seasonal variability of ozone dry deposition under southern European climate conditions, in Portugal

Contact Info

Product

Resources

About