John M Skelly

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Tropospheric ozone (O(3)) was first determined to be phytotoxic to grapes in southern California in the 1950s. Investigations followed that showed O(3) to be the cause of foliar symptoms on tobacco and eastern white pine. In the 1960s, "X" disease of ponderosa pines within the San Bernardino Mountains was likewise determined to be due to O(3). Nearly 50(More)
The objectives of this study were to examine the foliar sensitivity to ozone exposure of 12 tree, shrub, and herbaceous species native to southern Switzerland and determine the seasonal cumulative ozone exposures required to induce visible foliar injury. The study was conducted from the beginning of May through the end of August during 2000 and 2001 using(More)
Tropospheric ozone has been identified as the most important regional scale air pollutant across much of eastern United States of America and many areas of Mediterranean climes in southern Europe (Millan et al. 1997). Within both regions, growing-season ozone exposures have been shown to induce distinctive foliar symptoms on numerous known sensitive plant(More)
Photochemical oxidants Cprimarily ozone) a s a i r p o l l u t a n t s pose a more serious problem t o f o r e s t s of t h e United S t a t e s than any o t h e r s i n g l e a i r p o l l u t a n t. Temperate and Mediterraean f o r e s t s elsewhere have most l i k e l y been s i m i l a r l y impacted and current i n v e s t i g a t i o n s of such e f f(More)
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