Effects of acidic aerosol, fog, mist and rain on crops and trees
- 1 May 1984
- journal article
- Published by The Royal Society in Philosophical Transactions of the Royal Society of London. B, Biological Sciences
- Vol. 305 (1124), 327-338
- https://doi.org/10.1098/rstb.1984.0061
Abstract
The most important factors to consider for a complete determination of the toxicity to vegetation of acidic precipitation are: settling velocity, mass transfer rates, capacity to wet surfaces; number, frequency, and duration of events; and chemical composition and concentration. Meteorological factors, such as wind velocity and humidity, also must be considered because they affect the physical, temporal, and chemical properties of precipitation. Climate is important because it influences the capacity of plants to adjust, recover, or compensate for exposure to acidic precipitation. Genotype affects the efficiency of capture and capacity to tolerate acidic conditions. Aerosol and fog droplets generally are more acidic than mist and rain but they may be less phytotoxic because smaller droplets are deposited and captured less readily by leaf surfaces except when wind velocity is high. Concentrations of acids, mainly sulphuric and nitric acids, in aerosols, fog, mist, and rain in polluted regions, appear to be insufficient to produce acute injury on vegetation except perhaps in the immediate vicinity of intense sources of emissions. Chronic effects of repeated exposure to acidic precipitation, such as the impact on plant nutrition or on processes occurring at the leaf surface-atmosphere interface, and interactions with gaseous pollutants such as ozone, cannot be evaluated at present owing to the lack of information.Keywords
This publication has 43 references indexed in Scilit:
- The Quantity of Acid in Acid FogJournal of the Air Pollution Control Association, 1983
- Strong and weak acidity of aerosols collected over the northeastern United StatesEnvironmental Science & Technology, 1983
- Major ion composition and chemical associations of inorganic atmospheric aerosolsEnvironmental Science & Technology, 1983
- Effects of ammonium sulfate aerosols on vegetation—II. Mode of entry and responses of vegetationAtmospheric Environment (1967), 1983
- Acidity of atmospheric aerosolsEnvironmental Science & Technology, 1981
- Chemical properties of tropospheric sulfur aerosolsAtmospheric Environment (1967), 1978
- Deposition of 2.75, 5.0 and 8.5 μm particles to plant and soil surfacesEnvironmental Pollution, 1977
- Atmospheric Aerosols: Size Distribution InterpretationJournal of the Air Pollution Control Association, 1975
- The effects of an artificial acid mist upon the growth of Betula alleghaniensis brittEnvironmental Pollution (1970), 1974
- Salt injury to plants with special reference to cations versus anions and ion activitiesPlant and Soil, 1971