Record Display for the EPA National Library Catalog


Main Title Uncertainty in North American wet deposition isopleth maps : effect of site selection and valid sample criteria /
Author Simpson, J. C., ; Olsen, A. R.
Other Authors
Author Title of a Work
Olsen, A. R.,
CORP Author Battelle Pacific Northwest Labs., Richland, WA.;Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Research and Exposure Assessment Lab.;Department of Energy, Washington, DC.
Publisher U.S. Environmental Protection Agency, Atmospheric Research and Exposure Assessment Laboratory,
Year Published 1990
Report Number EPA/600/4-90/005; DE-AC06-76RLO 1830; PB91101774
Stock Number PB91-101774
OCLC Number 22529259
Subjects Acid deposition--United States--Maps ; Acid rain--United States--Maps
Additional Subjects Deposition ; Precipitation(Meteorology) ; Nomographs ; Probability theory ; Maps ; Study estimates ; Site surveys ; Spatial distribution ; Data processing ; Atmospheric chemistry ; pH ; Comparison ; Sulfates ; Numerical analysis ; Least squares method ; Interpolation ; Concentration(Composition) ; Air pollution sampling ; Wet methods ; North American ; Acid rain ; Regional analysis
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EHAM  TD427.A27S55 1990 Region 1 Library/Boston,MA 04/29/2016
EJBD  EPA 600-4-90-005 Headquarters Library/Washington,DC 08/14/2013
EKBD  EPA-600/4-90-005 Research Triangle Park Library/RTP, NC 08/30/2010
EKCD  EPA/600/4-90/005 CEMM/GEMMD Library/Gulf Breeze,FL 07/25/2018
ELBD ARCHIVE EPA 600/4-90/005 Received from HQ AWBERC Library/Cincinnati,OH 10/04/2023
ESAD  EPA 600-4-90-005 Region 10 Library/Seattle,WA 03/23/2010
NTIS  PB91-101774 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 1 volume (various pagings) : illustrations, maps ; 28 cm
The report considers several issues related to the preparation of isopleth maps for the display of spatial patterns of wet deposition. The valid sample criteria and data completeness rating used in the data summarization process are described. The data interpolation technique, kriging, is presented and its derivation in terms of generalized least squares regression is given. Four different annual summaries for pH, sulfate concentration, and sulfate deposition in 1986 are prepared using either the Unified Deposition Database Committee (UDDC) definition of valid sample criteria or a relaxed valid sample criteria and the UDDC data completeness rating or a relaxed data completeness rating. The kriged estimates for the different annual summaries and the differences between these estimates are contoured. The effects of relaxing the valid sample criteria and data completeness rating are discussed. Conclusions are drawn about network operation, network design and the uncertainty of contour maps. It is recommended that in the case where the objective is contour maps to show regional patterns, the emphasis in most regions needs to be on the number of valid samples per site and the regional representativeness of the sites.
"Pacific Northwest Laboratory." Shipping list no.: 90-619-P. "August 1990." Includes bibliographical references (pages 7.1-7.2). "EPA/600/4-90/005."