Precipitation chemistry at the Marcell Experimental Forest in north central Minnesota

Journal Article · Fri Apr 01 04:00:00 EST 1983 · Water Resour. Res.; (United States)

DOI:https://doi.org/10.1029/WR019i002p00454· OSTI ID:6071733

Verry, E S

Concentration (milligrams and microequivalents per liter) values are presented for major ions occurring in rain and snow from July 1978 to July 1980. Ammonium, sodium, and calcium are the largest equivalent weight cations which are largely balanced by sulfate and nitrate anions. Hydrogen is the fourth most abundant cation; but high combined concentrations of other cations in 27% of the sample events mask positive correlations with high hydrogen concentrations. Field-measured pH averaged 4.3, but the range (3.5 to 6.5) fluctuated with a combination of earth and air mass conditions. When high cation (and anion) data are deleted, low pH correlates well with high nitrate. Sulfate concentrations are similar to those measured in 1936 and do not correlate with pH. Calcium and, to a lesser extent, ammonium tend to increase pH values. High nitrate values also correlate positively with high excess acidity, while high sodium and calcium values correlate with high excess alkalinity. 28 references, 4 figures, 5 tables.

• Research Organization: North Central Forest Experiment Station, Grand Rapids, MN
• OSTI ID: 6071733
• Journal Information: Water Resour. Res.; (United States), Journal Name: Water Resour. Res.; (United States) Vol. 19:2; ISSN WRERA
• Country of Publication: United States
• Language: English

Related Subjects

500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ACID NEUTRALIZING CAPACITY
ACID RAIN
ALKALI METALS
ALKALINE EARTH METALS
AMMONIUM COMPOUNDS
ANIONS
ATMOSPHERIC CHEMISTRY
ATMOSPHERIC PRECIPITATIONS
CALCIUM
CATIONS
CHARGED PARTICLES
CHEMICAL COMPOSITION
CHEMISTRY
CORRELATIONS
ECOLOGICAL CONCENTRATION
ELEMENTS
FEDERAL REGION V
HYDROGEN IONS
HYDROGEN IONS 1 PLUS
IONS
METALS
MINNESOTA
NITRATES
NITROGEN COMPOUNDS
NORTH AMERICA
OXYGEN COMPOUNDS
PH VALUE
RAIN
SNOW
SODIUM
SULFATES
SULFUR COMPOUNDS
USA
WATER CHEMISTRY