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Spatial characterization of acid rain stress in Canadian Shield LakesThe acidification of lake waters from airborne pollution is of continental proportions both in North America and Europe. A major concern of the acid rain problem is the cumulative ecosystem damage to lakes and forest. The number of lakes affected in northeastern U.S. and on the Canadian Shield is though to be enormous. How seasonal changes in lake transparency are related to annual acidic load was examined. The relationship between variations in lake acidification and ecophysical units was also examined. The utility of Thematic Mapper based observations to measure seasonal changes in the optical transparency in acid lakes was investigated. The potential for this optical response is related to a number of local ecophysical factors with bedrock geology being, perhaps, the most important. Other factors include sulfate deposition, vegetative cover, and terrain drainage/relief. The area of southern Ontario contains a wide variety of geologies from the most acid rain sensitive granite quartzite types to the least sensitive limestone dolomite sediments. Annual sulfate deposition ranges from 1.0 to 4.0 grams/sq m.
Document ID
19880001049
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Tanis, Fred J.
(Environmental Research Inst. of Michigan Ann Arbor, MI, United States)
Date Acquired
September 5, 2013
Publication Date
January 1, 1987
Subject Category
Environment Pollution
Report/Patent Number
REPT-189400-24-L
NAS 1.26:180577
NASA-CR-180577
Accession Number
88N10431
Funding Number(s)
CONTRACT_GRANT: NAS5-28779
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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