Atmospheric input of some cations and anions to forest ecosystems in North Carolina and Tennessee
- Coweeta Hydrologic Lab., Franklin, NC
The atmospheric contributions of elements in precipitation and dry fallout to forest ecosystems were measured at two sites in the southern Appalachians. At both sites, relative mean annual concentrations of cations in bulk precipitation were in the order Ca > Na > K > Mg. At the Coweeta Hydrologic Laboratory in North Carolina, average annual inputs of Ca/sup + +/, Na/sup +/, K/sup +/, Mg/sup + +/, and NH/sub 4/-N in 1970-1973 were 4.88, 3.52, 1.62, 1.01, and 0.52 kg/ha/yr, respectively. At Walker Branch, Tennessee, the inputs of these elements during the same time period were 15.73, 3.89, 2.99, 2.94, and 2.37 kg/ha/yr. The inputs of NO/sub 3/-N, PO/sub 4/-P, and Cl/sup -/ in 1972-1973 were 2.88, 0.19, and 8.53 kg/ha/yr at Coweeta. Inputs of NO/sub 3/-N and PO/sub 4/-P were 4.61 and 0.55 kg/ha at Walker Branch over the same period. One reason for differences in bulk precipitation chemistry was greater dry fallout for some cations at Walker Branch than at Coweeta. For both sites, dry fallout associated with local land use activities influenced seasonal concentrations of bulk precipitation except for Na/sup +/, which appeared to be partly derived from marine sources. Total inputs of elements are considered to be minimum estimates for both forest ecosystems due to sampling and analytical methods.
- OSTI ID:
- 7227801
- Journal Information:
- Water Resour. Res.; (United States), Journal Name: Water Resour. Res.; (United States) Vol. 12:3; ISSN WRERA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
Atmospheric-- Basic Studies-- (-1989)
510100* -- Environment
Terrestrial-- Basic Studies-- (-1989)
54 ENVIRONMENTAL SCIENCES
553000 -- Agriculture & Food Technology
60 APPLIED LIFE SCIENCES
AIR POLLUTION
ALKALI METALS
ALKALINE EARTH METALS
AMMONIA
ATMOSPHERIC PRECIPITATIONS
CALCIUM
CHARGED PARTICLES
CHLORINE
DEPOSITION
ECOSYSTEMS
ELEMENTS
FORESTS
HALOGENS
HYDRIDES
HYDROGEN COMPOUNDS
IONS
MAGNESIUM
MEASURING METHODS
METALS
NITRATES
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NONMETALS
NORTH AMERICA
NORTH CAROLINA
NUTRIENTS
OXYGEN COMPOUNDS
PHOSPHATES
PHOSPHORUS COMPOUNDS
POLLUTION
POTASSIUM
SEASONAL VARIATIONS
SEDIMENTATION
SODIUM
SOUTHEAST REGION
TENNESSEE
TERRESTRIAL ECOSYSTEMS
USA
VARIATIONS
WATERSHEDS