Atmospheric pollution in the ponderosa pine blight area, Spokane County, Washington
The ponderosa pine trees in the industrialized area north of Spokane, Washington, have exhibited a characteristic reddening of the needles since 1943, known locally as ponderosa pine blight. The blighted area now embraces approximately 50 square miles, and the trees within a 3-square mile area near the center are dead. As a portion of a comprehensive investigation, the concentrations of gaseous fluorine and sulfur compounds in the air during the growing season of 1950 have been determined through operation of twelve air-sampling stations and a mobile air-analysis laboratory. Analysis of rain-water samples obtained during each rainy period throughout October and November 1950 at 82 locations established the points of origin of the contaminants and the extent of their dispersion. Meteorological and topographical conditions in the ponderosa pine blight area, which control the dispersion of pollutants and explain the damage and pollutant concentration-patterns, are discussed. Concentrations of gaseous fluorine compounds in the atmosphere of the area will serve as a guide in controlled fumigation of ponderosa pine.
- Research Organization:
- State Coll. of Washington, Pullman
- OSTI ID:
- 6403784
- Journal Information:
- Ind. Eng. Chem.; (United States), Journal Name: Ind. Eng. Chem.; (United States) Vol. 44:6; ISSN IECHA
- Country of Publication:
- United States
- Language:
- English
Similar Records
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Decline and mortality of smog-injured ponderosa pine
Related Subjects
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.
AIR POLLUTION
BIOLOGICAL EFFECTS
CONIFERS
ELEMENTS
FLUORIDES
FLUORINE
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
HALOGENS
INJURIES
NONMETALS
PINES
PLANTS
POLLUTION
TREES