Precipitation acidity: the role of the forest canopy in acid exchange

Journal Article · Tue Jan 01 04:00:00 EST 1980 · J. Environ. Qual.; (United States)

DOI:https://doi.org/10.2134/jeq1980.00472425000900010022x· OSTI ID:5375707

Hoffman, Jr, W A; Lindberg, S E; Turner, R R

Individual rain events were sampled above and below the forest canopy in Walker Branch Watershed, Tennessee, from August 1977 to June 1978 for the purpose of analysis of acidity and organic content. Strong acid content correlated with sulfate concentrations. Total acid concentrations were conserved as rain penetrated chestnut oak (Quercus prinus L.) canopies, although the strong/weak acid ratio declined substantially. Although weak acids constituted at least 30% of the total acidity of incident rain and increased to over 50% in throughfall, the increase could not be entirely attributed to organic acids. The results of the study support the fundamental importance of iron-exchange models in systematizing rain-vegetation interactions.

• Research Organization: Oak Ridge National Lab., TN
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 5375707
• Journal Information: J. Environ. Qual.; (United States), Journal Name: J. Environ. Qual.; (United States) Vol. 9:1; ISSN JEVQA
• Country of Publication: United States
• Language: English

Related Subjects

520200* -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ACID RAIN
ATMOSPHERIC PRECIPITATIONS
DATA
DATA COMPILATION
DATA FORMS
ECOLOGICAL CONCENTRATION
FOLIAR UPTAKE
GRAPHS
INFORMATION
ION EXCHANGE
MONITORING
NITRATES
NITROGEN COMPOUNDS
NORTH AMERICA
NUMERICAL DATA
ORGANIC ACIDS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PH VALUE
PLANTS
RAIN
SOUTHEAST REGION
SULFATES
SULFUR COMPOUNDS
TABLES
TENNESSEE
TREES
UPTAKE
USA