The deposition of particles on moss and grass surfaces

Clough, W.S.

doi:10.1016/0004-6981(75)90187-0

Cited by 99 publications

(48 citation statements)

References 6 publications

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“…Dust deposition is mostly parameterized through deposition velocity, w d , and in most dust-deposition experimental Wind Tunnel: Chamberlain (1967) Grass 0.7 Chamberlain (1967) Sticky grass 0.7 Clough (1973) Filter paper 0.24 Clough (1975) Dry tray 0.37-0.87 Clough (1975) Wet tray 0.37-0.87…”

Section: Introductionmentioning

confidence: 99%

Measurements of dust deposition velocity in a wind-tunnel experiment

2014

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Abstract. In this study, we present the results of a windtunnel experiment on dust deposition. A new method is proposed to derive dust deposition velocity from PDA (particle dynamics analysis) particle-velocity and particle-size measurements. This method has the advantage that the motions of individual dust particles are directly observed and all relevant data for computing dust deposition velocity is collected using a single instrument, and thus the measurement uncertainties are reduced. The method is used in the wind-tunnel experiment to measure dust deposition velocities for different particle sizes, wind speeds and surface conditions. For sticky-smooth wood and water surfaces, the observed dust deposition velocities are compared with the predictions using a dust deposition scheme, and the entire data set is compared with the data found in the literature. From the wind-tunnel experiments, a relatively reliable data set of dust deposition velocities is obtained, which is valuable for the development and validation of dust deposition schemes.

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Section: Introductionmentioning

confidence: 99%

Measurements of dust deposition velocity in a wind-tunnel experiment

2014

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“…Experiments performed on short grass (Chamberlain, 1967;Clough, 1975;Garland, 1983) and moorland (Gallagher et al, 1988;Nemitz et al, 2002) are used to evaluate the performance of the present model fed with the parameters of LUC 13 (Tables 1 and 2 …”

Section: Deposition On Short Grassmentioning

confidence: 99%

“…4. Clough (1975);Garland (1983); Gallagher et al (1988);Nemitz et al (2002) for friction velocity between 25 and 55 cm s −1 . A friction velocity of 40 cm s −1 is used to run the model of Zhang et al (2001, in brown), the 1-D-model on leaf and needle obstacles (red plain and dash) and the present model on leaf and needle obstacles (blue plain and dash).…”

Section: Deposition On Bare Soilmentioning

confidence: 99%

Development and validation of a size-resolved particle dry deposition scheme for application in aerosol transport models

2010

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Abstract. A size-resolved particle dry deposition scheme is developed for inclusion in large-scale air quality and climate models where the size distribution and fate of atmospheric aerosols is of concern. The "resistance" structure is similar to what is proposed by Zhang et al. (2001), while a new "surface" deposition velocity (or surface resistance) is derived by simplification of a one-dimensional aerosol transport model (Petroff et al., 2008b(Petroff et al., , 2009). Compared to Zhang et al.'s model, the present model accounts for the leaf size, shape and area index as well as the height of the vegetation canopy. Consequently, it is more sensitive to the change of land covers, particularly in the accumulation mode (0.1-1 micron). A drift velocity is included to account for the phoretic effects related to temperature and humidity gradients close to liquid and solid water surfaces. An extended comparison of this model with experimental evidence is performed over typical land covers such as bare ground, grass, coniferous forest, liquid and solid water surfaces and highlights its adequate prediction. The predictions of the present model differ from Zhang et al.'s model in the fine mode, where the latter tends to over-estimate in a significant way the particle deposition, as measured by various investigators or predicted by the present model. The present development is thought to be useful to modellers of the atmospheric aerosol who need an adequate parameterization of aerosol dry removal to the earth surface, described here by 26 land covers. An open source code is available in Fortran90.

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“…In auto irrigation system, mosses are placed on capullaing mat attached to a container (Plastic) filled with water is meant to keep the moss bag wet. According to Clough [36], wet moss bags have a higher speed of deposition of particles than on dry moss bags.…”

Section: Exposurementioning

confidence: 99%

Moss Bag Preparation: A Low-Cost Technique in Monitoring Airborne Particulate and Toxic Elements

Fo¹,

Jj²

2017

Preprint

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Air pollution has created a lot of problems in the developed and developing countries. To avoid or reduce these problems, constant monitoring of the air should be ensured. The conventional techniques is costly because it requires a lot of money and time consuming. Biomonitoring has been the alternative method. Moss, lichens and plants are biomonitors available to entrap air pollutants. The aim of this paper is to discuss one of the ways of monitoring air pollution -Moss bag technique. To do this, types, choice, preparation, handling of bags after preparation of moss were discussed. From the literatures consulted, it was discovered that there were differences in the techniques used by the researchers. In all, the use of mosses with emphasis on the employment of moss bag have proved to be a powerful tool in airborne particulate and toxic elements. To conclude, developing countries should focus more on this technique because it will reduce cost of air monitoring.

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The deposition of particles on moss and grass surfaces

Cited by 99 publications

References 6 publications

Measurements of dust deposition velocity in a wind-tunnel experiment

Measurements of dust deposition velocity in a wind-tunnel experiment

Development and validation of a size-resolved particle dry deposition scheme for application in aerosol transport models

Moss Bag Preparation: A Low-Cost Technique in Monitoring Airborne Particulate and Toxic Elements

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