||Spatial and Temporal Patterns of Eastern U.S. Haziness: A Summary.
Husar, Rudolf B. ;
Holloway, Janet M. ;
Patterson, David E. ;
Wilson, William E. ;
||Washington Univ., St. Louis, MO.;Environmental Sciences Research Lab., Research Triangle Park, NC.
Periodic variations ;
Urban areas ;
Weather observations ;
Eastern Region(United States)
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
One of the key features of the optical environment over the eastern U.S. is the frequent occurrence of regional haziness, particularly during the summer season. Four historical data bases were examined for estimation of the regional trend in haziness over the past 80 years. In the 1970's the lowest visibility occurred in the region of the Ohio River. The strongest increase of haziness was noted in the states adjacent to the Smoky Mountains: the average visibility there has decreased from 24 to 10 km since 1948. That region also exhibits the highest turbidity.