A Special Issue of the Journal of the Air & Waste Management Association on Regional and Global Perspectives on Haze: Causes, Consequences, and Controversies
This issue of the Journal of the Air & Waste Management Association contains selected papers presented at the October 2004 A&WMA Visibility Specialty Conference in Asheville, NC. (A CD-ROM containing full manuscripts or extended abstracts of each paper is available from the A&WMA Online Library at http://www.awma. org; Order Code VIP-134-CD, ISBN 0–923904-72–5.) The title of the conference, Regional and Global Perspectives on Haze: Causes, Consequences, and Controversies, set the theme for the meeting, which featured papers on various ways to monitor and better understand haze events over spatial scales ranging from intraregional to intercontinental. While scientists have been investigating the nature and causes of atmospheric haze events for many decades, the recent expanded interest in regional haze issues in the United States is a direct result of the 1999 federal regulation that calls for monotonic reductions of the worst haze conditions at 156 national parks and wilderness areas, with a target of eliminating man-caused haze by 2064. Resources and activities designed to implement the so-called Regional Haze Rule have stimulated more technical assessments of this topic in the last five years than during the previous two decades. Five federally funded Regional Planning Organizations (RPOs), composed of air quality representatives from state and tribal agencies with active participation by federal organizations and private stakeholder groups, have planned and sponsored numerous haze and aerosol monitoring, data assessment, and modeling activities nationwide to provide the information needed for haze rule implementation.