1988 Wet deposition temporal and spatial patterns in North America

Technical Report · Sun Mar 01 04:00:00 EST 1992

DOI:https://doi.org/10.2172/10136548· OSTI ID:10136548

Simpson, J C; Olsen, A R; Bittner, E A

The focus of this report is on North American wet deposition temporal patterns from 1979 to 1988 and spatial patterns for 1988. It is the third in a series of reports that investigate the patterns of annual precipitation-weighted average concentration and annual deposition for nine ion species: hydrogen, sulfate, nitrate, ammonium, calcium, chloride, sodium, potassium, and magnesium. Mosaic maps, based on surface estimation using kriging, display concentration and deposition spatial patterns of pH, hydrogen, sulfate, nitrate, ammonium, and calcium ion species for 1988 annual, winter, and summer periods. Temporal pattern analyses use a subset of 35 sites over a 10-year (1979--1988) period and an expanded subset of 137 sites, with greater spatial coverage, over a 7-year (1982--1988) period. The 10-year period represents the longest period with wet deposition monitoring data available that has a sufficient number of sites with data of known quality to allow a descriptive summary of annual temporal patterns. Sen`s median trend estimate and Kendall`s seasonal tau (KST) test are calculated for each ion species concentration and deposition at each site in both subsets.

• Research Organization: Pacific Northwest Lab., Richland, WA (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States); Environmental Protection Agency, Washington, DC (United States)
• DOE Contract Number: AC06-76RL01830
• OSTI ID: 10136548
• Report Number(s): PNL--8049; ON: DE92011509
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540110
ACID RAIN
AMMONIUM COMPOUNDS
ATMOSPHERIC PRECIPITATIONS
BASIC STUDIES
CALCIUM
CANADA
CHLORIDES
EMISSION
HYDROGEN
MAGNESIUM
NITRATES
NITROGEN OXIDES
PARTICULATES
POTASSIUM
REGIONAL ANALYSIS
SEASONAL VARIATIONS
SODIUM
SPATIAL DISTRIBUTION
SULFATES
SULFUR OXIDES
USA
WASHOUT