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dc.contributorNational Science Foundation (U.S.)-
dc.contributorUniversity of Calgary. Dept. of Geography.-
dc.contributor.authorCragin, James H.-
dc.contributor.authorGiovinetto, Mario B.-
dc.contributor.authorGow, A. J. (Anthony Jack)-
dc.descriptionCRREL Report-
dc.descriptionAbstract: Measurements of meltwater pH from annual layers of South Pole firn and ice samples ranging in age from 40 to 2000 years B.P. show that precipitation at this remote site has a higher natural acidity than that expected from atmospheric equilibrium with CO2. The average pH of deaerated (CO2-free) samples was 5.64 ± 0.08, while air equilibrated samples averaged 5.37 ± 0.08,a pH that is about a factor of two more acidic than the expected background pH of 5.65. The observed "excess" acidity can be accounted for by natural SO4^2- and NO3^- levels in the samples probably originating from non-anthropogenic H2SO4 and HNO3. Because of the presence of these naturally occurring acids in South Pole precipitation, a pH of 5.4 is considered a more representative baseline reference pH for acid precipitation studies.-
dc.publisherCold Regions Research and Engineering Laboratory (U.S.)-
dc.publisherEngineer Research and Development Center (U.S.)-
dc.relation.ispartofseriesCRREL report ; 84-15.-
dc.rightsApproved for public release; distribution is unlimited.-
dc.sourceThis Digital Resource was created from scans of the Print Resource-
dc.subjectAcid rain-
dc.subjectAcid precipitation-
dc.subjectAntarctic regions-
dc.subjectCore sampling-
dc.subjectIce cores-
dc.subjectSouth Pole-
dc.titleBaseline acidity of ancient precipitation from the South Pole-
Appears in Collections:CRREL Report

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