Critical survey of measurements of foliar deposition of airborne sulfates and nitrates
Conference
·
OSTI ID:6757311
This paper reviews the available data on processes affecting foliar deposition and retention of particles from the point of view of determining the effects of sulfates and nitrates on plants. The particle characteristics of size, shape, frequency distribution, and chemical speciation from typical air monitoring data are discussed in terms of dry deposition velocity and foliar collection and retention; first principles as well as empirical results are examined as methods of calculating dry deposition. Wet deposition of sulfates is examined in terms of foliar collection, foliar retention, scavenging, and the dependency upon precipitation characteristics. It is shown that the particle collection efficiency and the interception coefficient can vary over an order of magnitude due to either the effects of plant type or the misrepresentation of the roughness, Z/sub 0/, of the vegetation canopy. Particle diameter has little effect on collection efficiency in the submicron-size range but great effect at larger diameters. In wet deposition, the scavenging efficiency is very low for particles less than 4 mu m in diameter, and the scavenging coefficient is so highly dependent upon rainfall rate that it is practically case-specific. More experimental data and improvements are needed before the sulfate and nitrate effects can be accurately assessed.
- Research Organization:
- California Univ., Livermore (USA). Lawrence Livermore Lab.
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 6757311
- Report Number(s):
- UCRL-80883; CONF-780636-2
- Country of Publication:
- United States
- Language:
- English
Similar Records
Foliar retention of 15N tracers: implications for net canopy exchange in low- and high-elevation forest ecosystems
Foliar retention and leachability of submicron plutonium and americium particles
A field investigation of sulfate fluxes to a deciduous forest
Journal Article
·
Tue Mar 31 23:00:00 EST 1998
· Forest Ecology and Management
·
OSTI ID:989689
Foliar retention and leachability of submicron plutonium and americium particles
Journal Article
·
Wed Dec 31 23:00:00 EST 1980
· J. Environ. Qual.; (United States)
·
OSTI ID:6568655
A field investigation of sulfate fluxes to a deciduous forest
Journal Article
·
Wed Sep 20 00:00:00 EDT 1989
· Journal of Geophysical Research; (USA)
·
OSTI ID:5293279
Related Subjects
500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
560303 -- Chemicals Metabolism & Toxicology-- Plants-- (-1987)
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
AEROSOLS
AIR POLLUTION
ATMOSPHERIC PRECIPITATIONS
BIOMASS
COLLOIDS
DEPOSITION
DISPERSIONS
ENERGY SOURCES
FOLIAR UPTAKE
LEAVES
MORPHOLOGY
NITRATES
NITROGEN COMPOUNDS
OXYGEN COMPOUNDS
PARTICLE SIZE
PLANTS
POLLUTION
RAIN
RENEWABLE ENERGY SOURCES
SCAVENGING
SIZE
SOLS
SULFATES
SULFUR COMPOUNDS
UPTAKE
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
560303 -- Chemicals Metabolism & Toxicology-- Plants-- (-1987)
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
AEROSOLS
AIR POLLUTION
ATMOSPHERIC PRECIPITATIONS
BIOMASS
COLLOIDS
DEPOSITION
DISPERSIONS
ENERGY SOURCES
FOLIAR UPTAKE
LEAVES
MORPHOLOGY
NITRATES
NITROGEN COMPOUNDS
OXYGEN COMPOUNDS
PARTICLE SIZE
PLANTS
POLLUTION
RAIN
RENEWABLE ENERGY SOURCES
SCAVENGING
SIZE
SOLS
SULFATES
SULFUR COMPOUNDS
UPTAKE