Zobrazeno 1 - 10
of 52
pro vyhledávání: '"Donald F. Gatz"'
Autor:
Clyde W. Sweet, Donald F. Gatz
Publikováno v:
Atmospheric Environment. 32:1129-1133
To provide information necessary for implementation of newly-revised U.S. standards for airborne particulate matter, we have analyzed available data on PM2.5 in Illinois. A major component of PM2.5 at locations in Illinois is secondary (NH4)2SO4 that
Autor:
Donald F. Gatz, Joseph M. Prospero
Publikováno v:
Atmospheric Environment. 30:3789-3799
During a summer atmospheric chemistry field project in central Illinois in 1979, unusually high concentrations of Si, Al, and other earth's crust elements were observed simultaneously in two series of 2-h aerosol samples collected at sites separated
Autor:
Kenneth A. Brice, William M. J. Strachan, Clyde W. Sweet, C. H. Chan, M. Shackleton, K.S. Harlin, Deborah A. Burniston, S. Cussion, William H. Schroeder, Terry F. Bidleman, Donald F. Gatz, Raymond M. Hoff
Publikováno v:
Atmospheric Environment. 30:3505-3527
An update is presented of the atmospheric loadings of 11 organochlorine chemicals, five trace elements and four polynuclear aromatic hydrocarbons (PAHs) to the Great Lakes. Intercomparison of this 1994 estimate is made with earlier loading estimates
Autor:
Luther Smith, Donald F. Gatz
Publikováno v:
Atmospheric Environment. 29:1195-1200
One motivation for estimating the standard error, SEMw, of a weighted mean concentration, Mw, of an ion in precipitation is to use it to compute a confidence interval for Mw. Typically this is done by multiplying the standard error by a factor that d
Autor:
Donald F. Gatz, Luther Smith
Publikováno v:
Atmospheric Environment. 29:1185-1193
Concentrations of chemical constituents of precipitation are frequently expressed in terms of the precipitation-weighted mean, which has several desirable properties. Unfortunately, the weighted mean has no analytical analog of the standard error of
Autor:
A. Nelson Dingle, Donald F. Gatz
Publikováno v:
Tellus A; Vol 23, No 1 (1971)
The temporal changes of contaminant concentrations in rain water samples collected sequentially at a fixed point are dependent upon both the rain scavenging and drop growth processes and the advective effects of the motion field upon the scalar field
Autor:
William R. Barnard, Gary J. Stensland, Tezz C. Johnson, Donald F. Gatz, Allen L. Williams, Dale A. Gillette, Peter C. Sinclair
Publikováno v:
Global Biogeochemical Cycles. 6:437-457
Models of dust emissions by wind erosion (including winds associated with regional activity as well as dust devils) and vehicular disturbances of unpaved roads were developed, calibrated,and used to estimate alkaline dust emissions from elemental soi
Autor:
Donald F. Gatz
Publikováno v:
Atmospheric Environment. Part B. Urban Atmosphere. 25:1-15
Urban sampling sites have been specifically excluded from recent large networks for measuring chemical composition of precipitation. Because information on precipitation composition in urban areas is needed for a variety of current applications, it i
Autor:
Donald F. Gatz
Publikováno v:
Atmospheric Environment (1967). 18:1895-1904
The identity and relative contributions of various sources of impurities in precipitation are needed to understand the acidic precipitation phenomenon. This paper reports results of using factor analysis and a chemical element balance (CEB) to apport
Autor:
Donald F. Gatz
Publikováno v:
Journal of Applied Meteorology. 14:217-221
This work was undertaken to measure background silver in Illinois precipitation in the absence of any known seeding operations in on near Illinois. The rainfall-weighted mean concentration in samples from several stations was 73 ng l−1. This is som