Measurement of atmospheric dry deposition at Emerald Lake in Sequoia National Park. Final report
The primary objective of the study was to evaluate atmospheric dry deposition of major anions and cations to trees in the Emerald Lake area of Sequoia National Park. The field work was performed between July 15 and September 10, 1987. Teflon-coated and non-coated branches of native lodgepole pine (Pinus concorta) and western white pine (P. monticola), and potted seedlings of Coulter pine (P. coulteri) were rinsed using deionized-distilled water. Nylon and paper filters were exposed along with the vegetation, and were extracted in deionized-distilled water. The rinses and extracts were analyzed for concentrations of nitrate, sulfate, phosphate, chloride, fluoride, ammonium, and metallic cations. The deposition of nitrate to paper filters and to Coulter pine branches was significantly higher than deposition to the native conifers. Deposition of nitrate was significantly greater than deposition of sulfate, supporting earlier studies of chapparal in the South Coast Air Basin. Ammonium deposition was also quite high, suggesting that transport from the valley may be a significant source of dry deposition in the Sierra.
- Research Organization:
- California Univ., Riverside (USA). Statewide Air Pollution Research Center
- OSTI ID:
- 6683989
- Report Number(s):
- PB-88-243779/XAB
- Country of Publication:
- United States
- Language:
- English
Similar Records
Executive summary - Assessing the response of Emerald Lake, an alpine watershed in Sequoia National Park, California, to acidification during snowmelt using a simple hydrochemical model
Snow deposition, melt, runoff, and chemistry in a small alpine watershed, Emerald Lake Basin, Sequoia National Park. Final report, 1 July 1984-31 March 1987
Related Subjects
ACID RAIN
DEPOSITION
AIR POLLUTION
LAKES
AEROSOLS
AMMONIUM COMPOUNDS
ANIONS
CALIFORNIA
CATIONS
CHEMICAL ANALYSIS
CHLORIDES
FLUORIDES
METALS
MONITORING
NAPAP
PROGRESS REPORT
ATMOSPHERIC PRECIPITATIONS
CHARGED PARTICLES
CHLORINE COMPOUNDS
COLLOIDS
DISPERSIONS
DOCUMENT TYPES
ELEMENTS
FEDERAL REGION IX
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
IONS
NORTH AMERICA
POLLUTION
RAIN
SOLS
SURFACE WATERS
USA
500200* - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)
520200 - Environment
Aquatic- Chemicals Monitoring & Transport- (-1989)