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Combined air pollution and pine ring structure observed xylochronologically 1
Author(s) -
Yokobori M.,
Ohta S.
Publication year - 1983
Publication title -
european journal of forest pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.535
H-Index - 49
eISSN - 1439-0329
pISSN - 0300-1237
DOI - 10.1111/j.1439-0329.1983.tb01305.x
Subject(s) - air pollution , ozone , environmental science , pollution , ring (chemistry) , air pollutants , intensity (physics) , phytotoxicity , chemistry , meteorology , horticulture , physics , biology , ecology , organic chemistry , quantum mechanics
Abstract Ring characteristics of pine trees grown in polluted air showed up distinctly as a decrease in newly devised synthetic indicators such as product of W (relative ring width) and DD (relative difference between maximum and minimum density within a ring) or product of W and MD (relative mean density). Intensity of combined air pollution was estimated by the total of daily maximum concentration of SO 2 , ozone, NO 2 , and NO 2 . Since synthetic indicators show a significant correlation, at the over 98% confidence level, with the intensity of combined air pollution, phytotoxicity of air to pine growth must be attributable at least in part to combined effect of air pollutants.