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Title: Processes affecting oxygen isotope ratios of atmospheric and ecosystem sulfate in two contrasting forest catchments in Central Europe

Abstract

Sulfate aerosols are harmful as respirable particles. They also play a role as cloud condensation nuclei and have radiative effects on global climate. A combination of {delta}{sup 18}O-SO{sub 4} data with catchment sulfur mass balances was used to constrain processes affecting S cycling in the atmosphere and spruce forests of the Czech Republic. Extremely high S fluxes via spruce throughfall and runoff were measured at Jezeri (49 and 80 kg S ha{sup -1} yr{sup -1}, respectively). The second catchment, Na Lizu, was 10 times less polluted. In both catchments, {delta}{sup 18}O-SO{sub 4} decreased in the following order: open-area precipitation {gt} throughfall {gt} runoff. The 180-SO{sub 4} values of throughfall exhibited a seasonal pattern at both sites, with maxima in summer and minima in winter. This seasonal pattern paralleled {delta}{sup 18}O-H{sub 2}O values, which were offset by -18{per_thousand}. Sulfate in throughfall was predominantly formed by heterogeneous (aqueous) oxidation of SO{sub 2}. Wet-deposited sulfate in an open area did not show systematic {delta}{sup 18}O-SO{sub 4} trends, suggesting formation by homogeneous (gaseous) oxidation and/or transport from large distances. The percentage of incoming S that is organically cycled in soil was similar under the high and the low pollution. High-temperature {sup 18}O-rich sulfate wasmore » not detected, which contrasts with North American industrial sites. 29 refs., 4 figs., 3 tabs.« less

Authors:
; ; ; ; ; ; ;  [1]
  1. Czech Geological Survey, Prague (Czech Republic). Department of Geochemistry
Publication Date:
OSTI Identifier:
20862365
Resource Type:
Journal Article
Resource Relation:
Journal Name: Environmental Science and Technology; Journal Volume: 41; Journal Issue: 3; Other Information: novak@cgu.cz
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; AEROSOLS; SULFATES; EUROPE; CZECH REPUBLIC; FORESTS; SPRUCES; AIR POLLUTION MONITORING; SEASONAL VARIATIONS; ENVIRONMENTAL TRANSPORT; SULFUR DIOXIDE; AIR POLLUTION; DEPOSITION; OXYGEN 18; ISOTOPE RATIO; CLIMATIC CHANGE; SULFUR CYCLE; ATMOSPHERIC PRECIPITATIONS; OXIDATION; MASS TRANSFER

Citation Formats

Martin Novak, Myron J. Mitchell, Iva Jackova, Frantisek Buzek, Jana Schweigstillova, Lucie Erbanova, Richard Prikryl, and Daniela Fottova. Processes affecting oxygen isotope ratios of atmospheric and ecosystem sulfate in two contrasting forest catchments in Central Europe. United States: N. p., 2007. Web. doi:10.1021/es0610028.
Martin Novak, Myron J. Mitchell, Iva Jackova, Frantisek Buzek, Jana Schweigstillova, Lucie Erbanova, Richard Prikryl, & Daniela Fottova. Processes affecting oxygen isotope ratios of atmospheric and ecosystem sulfate in two contrasting forest catchments in Central Europe. United States. doi:10.1021/es0610028.
Martin Novak, Myron J. Mitchell, Iva Jackova, Frantisek Buzek, Jana Schweigstillova, Lucie Erbanova, Richard Prikryl, and Daniela Fottova. Thu . "Processes affecting oxygen isotope ratios of atmospheric and ecosystem sulfate in two contrasting forest catchments in Central Europe". United States. doi:10.1021/es0610028.
@article{osti_20862365,
title = {Processes affecting oxygen isotope ratios of atmospheric and ecosystem sulfate in two contrasting forest catchments in Central Europe},
author = {Martin Novak and Myron J. Mitchell and Iva Jackova and Frantisek Buzek and Jana Schweigstillova and Lucie Erbanova and Richard Prikryl and Daniela Fottova},
abstractNote = {Sulfate aerosols are harmful as respirable particles. They also play a role as cloud condensation nuclei and have radiative effects on global climate. A combination of {delta}{sup 18}O-SO{sub 4} data with catchment sulfur mass balances was used to constrain processes affecting S cycling in the atmosphere and spruce forests of the Czech Republic. Extremely high S fluxes via spruce throughfall and runoff were measured at Jezeri (49 and 80 kg S ha{sup -1} yr{sup -1}, respectively). The second catchment, Na Lizu, was 10 times less polluted. In both catchments, {delta}{sup 18}O-SO{sub 4} decreased in the following order: open-area precipitation {gt} throughfall {gt} runoff. The 180-SO{sub 4} values of throughfall exhibited a seasonal pattern at both sites, with maxima in summer and minima in winter. This seasonal pattern paralleled {delta}{sup 18}O-H{sub 2}O values, which were offset by -18{per_thousand}. Sulfate in throughfall was predominantly formed by heterogeneous (aqueous) oxidation of SO{sub 2}. Wet-deposited sulfate in an open area did not show systematic {delta}{sup 18}O-SO{sub 4} trends, suggesting formation by homogeneous (gaseous) oxidation and/or transport from large distances. The percentage of incoming S that is organically cycled in soil was similar under the high and the low pollution. High-temperature {sup 18}O-rich sulfate was not detected, which contrasts with North American industrial sites. 29 refs., 4 figs., 3 tabs.},
doi = {10.1021/es0610028},
journal = {Environmental Science and Technology},
number = 3,
volume = 41,
place = {United States},
year = {Thu Feb 15 00:00:00 EST 2007},
month = {Thu Feb 15 00:00:00 EST 2007}
}