Gauci, Vincent; Dise, Nancy and Blake, Stephen
(2005).
| URL: | http://cepsar.open.ac.uk/pers/v.gauci/pics/d43291.... |
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| DOI (Digital Object Identifier) Link: | http://dx.doi.org/doi:10.1029/2005GL022544 |
| Google Scholar: | Look up in Google Scholar |
Abstract
Wetlands are a potent source of the radiatively important gas methane (CH4). Recent findings have demonstrated that sulfate (SO4 2−) deposition via acid rain suppresses CH4 emissions by stimulating competitive exclusion of methanogens by sulfate-reducing microbial populations. Here we report data from a field experiment showing that a finite pulse of simulated acid rain SO4 2− deposition, as would be expected from a large Icelandic volcanic eruption, continues to suppress CH4 emissions from wetlands long after the pollution event has ceased. Our analysis of the stoichiometries suggests that 5 years is a minimum CH4 emission recovery period, with 10 years being a reasonable upper limit. Our findings highlight the long-term impact of acid rain on biospheric output of CH4 which, for discrete polluting events such as volcanic eruptions, outlives the relatively short-term SO4 2− aerosol radiative cooling effect.
| Item Type: | Journal Article |
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| ISSN: | 0094-8276 |
| Extra Information: | Some of the symbols may not have transferred correctly into this bibliographic record and/or abstract. |
| Keywords: | methane; wetlands; peatlands; acid rain; suppression; sulfate reduction; volcanic; eruption; Laki; climate |
| Academic Unit/Department: | Science > Environment, Earth and Ecosystems |
| Interdisciplinary Research Centre: | OpenSpace Research Centre (OSRC) Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR) |
| Item ID: | 3917 |
| Depositing User: | Vincent Gauci |
| Date Deposited: | 15 Nov 2006 |
| Last Modified: | 02 Dec 2010 19:50 |
| URI: | http://oro.open.ac.uk/id/eprint/3917 |
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