Tree-ring variation in western larch (Larix occidentalis Nutt. ) exposed to sulfur dioxide emissions
Tree-ring analysis of western larch (Larix occidentialis Nutt) demonstrated both direct and indirect affects of sulfur dioxide emissions from the lead/zinc smelter at Trail, B.C. Tree cores were collected from 5 stands known to have been polluted and from 3 control stands. Age effects were removed by fitting theoretical growth curves, and macrocliate was modeled using the average of the controls and two laged values thereof. Separate analyses were performed for years before and after installation of two tall stacks, for drought and nondrought years, and for years prior to initiation of smelting. Regression analyses revealed a negative effect on annual growth that diminished with increasing distance from the smelter and during drought years. Furthermore, chronology statistics suggested an increase in sensitivity to climate that persisted decades beyond implementation of pollution controls, which reduced emissions 10-fold. 38 references, 6 figures, 3 tables.
- Research Organization:
- Arizona State Univ., Tempe (USA)
- DOE Contract Number:
- AC02-81ER60004
- OSTI ID:
- 5982816
- Report Number(s):
- DOE/ER/60004-T1; ON: DE85006070
- Resource Relation:
- Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
Similar Records
Tree-ring cation response to experimental watershed acidification in West Virginia and Maine
Drought frequency in central California since 101 B.C. recordered in giant sequoia tree rings
Related Subjects
54 ENVIRONMENTAL SCIENCES
CONIFERS
PLANT GROWTH
SULFUR DIOXIDE
BIOLOGICAL EFFECTS
TREE RINGS
VARIATIONS
AIR POLLUTION
BRITISH COLUMBIA
EXPERIMENTAL DATA
REGRESSION ANALYSIS
SMELTERS
TREES
CANADA
CHALCOGENIDES
DATA
GROWTH
INFORMATION
MATHEMATICS
NORTH AMERICA
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PLANTS
POLLUTION
STATISTICS
SULFUR COMPOUNDS
SULFUR OXIDES
560303* - Chemicals Metabolism & Toxicology- Plants- (-1987)
500200 - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)