You are here: Home
/ Publication Information
Title: Ozone exposures and implications for vegetation in rural areas of the central Appalachian Mountains, U.S.A.
Author: Edwards, Pamela; Huber, Cindy; Wood, Frederica;
Source: Environmental Monitoring and Assessment. 98: 157-174.
Publication Series: Miscellaneous Publication
Description: The United States is making the transition from the 1979 1 hr maximum ozone standard to the newly adopted 8 hr ozone standard (3 yr average of the 4th highest maximum 8 hr ozone concentration). Consequently, we analyzed and compared ozone concentrations under both standards from a variety of monitoring sites throughout the central Appalachian region of Kentucky (KY), West Virginia (WV), and Virginia (VA). Data from 1988-1999 were used to determine how ozone exposure between the two metrics compared for remote sites. Most sites exceeded the 1 hr standard in 1988-1990 due to the 3 yr averaging and multiple high ozone concentrations that occurred over the region in 1988. All sites were in compliance with the 1 hr standard every year after 1991. It was much more common for the ozone exposure to exceed the 8 hr standard, particularly from 1997-1999. Many sites showed exceedences beginning in 1995; Big Meadows (VA) exceeded the 8 hr standard all years except 1994 and 1996. Response of vegetation to ozone in these areas was determined using the combination of W126 values (sigmoidally weighted exposure index), the number of hours that average concentrations >O. 10 ppm (N100), and the presence of moderate or more extreme droughts. In general, W126 and Nl00 values suggested that negative vegetation growth responses over most of the 12 yr would have been minimal for most sites, even for those exceeding ozone standards. Drought-induced stomata1 closures would have overridden more extreme negative growth responses at all but the Big Meadows site in 1988.
Keywords: air pollution, compliance, drought, forest health, Ozone standards
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
- This publication may be available in hard copy. Check the Northern Research Station web site to request a printed copy of this publication.
- Our on-line publications are scanned and captured using Adobe Acrobat. During the capture process some typographical errors may occur. Please contact Sharon Hobrla, firstname.lastname@example.org if you notice any errors which make this publication unusable.
XML: View XML
Edwards, Pamela; Huber, Cindy; Wood, Frederica 2004. Ozone exposures and implications for vegetation in rural areas of the central Appalachian Mountains, U.S.A. Environmental Monitoring and Assessment. 98: 157-174.
Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility