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Chemical and optical changes in freshwater dissolved organic matter exposed to solar radiation

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Chemical and optical changes in freshwater dissolved organic matter exposed to solar radiation; 2001; Article; Journal; Biogeochemistry; Osburn, C. L.; Morris, D. P.; Thorn, K. A.; Moeller, R. E.

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We studied the chemical and optical changes inthe dissolved organic matter (DOM) from twofreshwater lakes and a Sphagnum bog afterexposure to solar radiation. Stable carbonisotopes and solid-state 13C-NMR spectraof DOM were used together with optical andchemical data to interpret results fromexperimental exposures of DOM to sunlight andfrom seasonal observations of two lakes innortheastern Pennsylvania. Solar photochemicaloxidation of humic-rich bog DOM to smaller LMWcompounds and to DIC was inferred from lossesof UV absorbance, optical indices of molecularweight and changes in DOM chemistry. Experimentally, we observed a 1.2‰ enrichment in δ13$C and a 47% loss in aromaticC functionality in bog DOM samples exposed tosolar UVR. Similar [...]

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Harvested on Mon Jul 21 11:41:59 MDT 2014 from MODS XML Service

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Type Scheme Key
local-index unknown 70023231
local-pk unknown 70023231
doi http://www.loc.gov/standards/mods/mods-outline-3-5.html#identifier doi:10.1023/A:1010657428418
series unknown Biogeochemistry

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journalBiogeochemistry
parts
typevolume
value54
typeissue
value3
languageEnglish
citationTypeArticle

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