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Cloud water chemistry in Sequoia National Park

Collett, Jeff, Jr. and Daube, Bruce, Jr. and Munger, J. William and Hoffmann, Michael R. (1989) Cloud water chemistry in Sequoia National Park. Atmospheric Environment, 23 (5). pp. 999-1007. ISSN 0004-6981. doi:10.1016/0004-6981(89)90303-X.

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Interception of cloudwater by forests in the Sierra Nevada Mountains may contribute significantly to acidic deposition in the region. Cloudwater sampled in Sequoia National Park had pH values ranging from 4.4 to 5.7. The advance of cold fronts into the Park appears to lead to higher aerosol and gas phase concentrations than are seen under normal mountain-valley circulations, producing higher cloud-water concentrations than might otherwise be expected. Estimates of annual deposition rates of NO_3^−, SO_4^(2−), NH_4^+ and H^+ due to cloudwater impaction are comparable to those measured in precipitation.

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Hoffmann, Michael R.0000-0001-6495-1946
Additional Information:© 1989 Pergamon Press. First received 31 May 1988 and in final form 28 September 1988. We are grateful to the National Park Service, particularly the research staff at Sequoia National Park, for allowing us access to the sampling sites. This work was supported by a contract with the California Air Resources Board (Contract No. A4-075-32).
Funding AgencyGrant Number
California Air Resources Board (CARB)A4-075-32
Subject Keywords:Intercepted cloudwater; acidic deposition; chemical composition; clouds; rainfall; acidity; nitrate; sulfate; formate; acetate; aerosol composition; organic acids; inorganic acids; ammonia; liquid water content; orographie effect; cold fronts; Sierra Nevada Mountains; Sequoia National Park
Issue or Number:5
Record Number:CaltechAUTHORS:20150817-115452414
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:59581
Deposited By: Ruth Sustaita
Deposited On:17 Aug 2015 20:27
Last Modified:10 Nov 2021 22:23

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