Net throughfall chemistry and atmospheric deposition at two forests of different elevations
Conference
·
· Bull. Ecol. Soc. Am.; (United States)
OSTI ID:5944501
We are measuring atmospheric deposition and throughfall chemistry at two coniferous sites. The higher (1800m) site is a red spruce (Picea rubens) forest; the lower (300m) is a loblolly pine (Pinus taeda) forest. Summed net chemical fluxes in throughfall (calculated as throughfall depth X concentrations minus rain depth X concentrations) are compared for April through July. Net fluxes of SO/sub 4//sup 2-/, NO/sub 3//sup -/, Na/sup +/, and Cl/sup -/, in throughfall are greater at the spruce site. Net fluxes of K/sup +/ and NH/sub 4//sup +/ in throughfall are greater at the pine site. Net fluxes of Ca/sub 2//sup +/ and Mg/sub 2//sup +4/ are nearly equal. Air concentrations and surrogate surface fluxes are quite similar between sites, except for higher NO/sub 3//sup -/ particle flux at the spruce site. Greater net throughfall fluxes at the spruce site reflect both greater canopy surface area, and cloud deposition to this site. Greater net K/sup +/ flux at the pine site reflects canopy losses. Negative NH/sub 4//sup +/ flux indicates spruce canopy uptake.
- Research Organization:
- Oak Ridge National Lab., Oak Ridge, TN (US)
- OSTI ID:
- 5944501
- Report Number(s):
- CONF-870835-
- Conference Information:
- Journal Name: Bull. Ecol. Soc. Am.; (United States) Journal Volume: 68:3
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
09 BIOMASS FUELS
140504* -- Solar Energy Conversion-- Biomass Production & Conversion-- (-1989)
510200 -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ALKALI METALS
ALKALINE EARTH METALS
ATMOSPHERIC PRECIPITATIONS
CALCIUM
CANOPIES
CHALCOGENIDES
CHEMICAL COMPOSITION
CHEMISTRY
CHLORINE
CONIFERS
DEPOSITION
ELEMENTS
FOLIAR UPTAKE
FORESTS
GROWTH
HALOGENS
MAGNESIUM
METALS
NITROGEN COMPOUNDS
NITROGEN OXIDES
NONMETALS
NUTRIENTS
OXIDES
OXYGEN COMPOUNDS
PINES
PINOPHYTA
PLANT GROWTH
PLANTS
POLLUTANTS
POTASSIUM
RAIN
SODIUM
SPRUCES
SULFATES
SULFUR COMPOUNDS
TREES
UPTAKE
WATER CHEMISTRY
140504* -- Solar Energy Conversion-- Biomass Production & Conversion-- (-1989)
510200 -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ALKALI METALS
ALKALINE EARTH METALS
ATMOSPHERIC PRECIPITATIONS
CALCIUM
CANOPIES
CHALCOGENIDES
CHEMICAL COMPOSITION
CHEMISTRY
CHLORINE
CONIFERS
DEPOSITION
ELEMENTS
FOLIAR UPTAKE
FORESTS
GROWTH
HALOGENS
MAGNESIUM
METALS
NITROGEN COMPOUNDS
NITROGEN OXIDES
NONMETALS
NUTRIENTS
OXIDES
OXYGEN COMPOUNDS
PINES
PINOPHYTA
PLANT GROWTH
PLANTS
POLLUTANTS
POTASSIUM
RAIN
SODIUM
SPRUCES
SULFATES
SULFUR COMPOUNDS
TREES
UPTAKE
WATER CHEMISTRY