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| Titel |
Large methyl halide emissions from south Texas salt marshes |
| VerfasserIn |
R. C. Rhew, M. E. Whelan, D.-H. Min |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 11, no. 22 ; Nr. 11, no. 22 (2014-11-27), S.6427-6434 |
| Datensatznummer |
250117693
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| Publikation (Nr.) |
 copernicus.org/bg-11-6427-2014.pdf |
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| Zusammenfassung |
| Coastal salt marshes are natural sources of methyl chloride (CH3Cl)
and methyl bromide (CH3Br) to the atmosphere, but measured emission
rates vary widely by geography. Here we report large methyl halide fluxes
from subtropical salt marshes of south Texas. Sites with the halophytic
plant, Batis maritima, emitted methyl halides at rates that are
orders of magnitude greater than sites containing other vascular plants or
macroalgae. B. maritima emissions were generally highest at midday;
however, diurnal variability was more pronounced for CH3Br than
CH3Cl, and surprisingly high nighttime CH3Cl fluxes were
observed in July. Seasonal and intra-site variability were large, even taking
into account biomass differences. Overall, these subtropical salt marsh sites
show much higher emission rates than temperate salt marshes at similar times
of the year, supporting the contention that low-latitude salt marshes are
significant sources of CH3Cl and CH3Br. |
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