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Major 20th century changes of the content and chemical speciation of organic carbon archived in Alpine ice cores: implications for the long-term change of organic aerosol over Europe

Dissolved organic carbon (DOC) and an extended array of organic compounds were investigated in an Alpine ice core covering the 1920-1988 time period. Based on this, a reconstruction was made of the long-term trends of water-soluble organic carbon (WSOC) aerosol in the European atmosphere. It is show...

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Hauptverfasser: Legrand, Michel (VerfasserIn) , Preunkert, S. (VerfasserIn) , May, Barbara Luise (VerfasserIn) , Guilhermet, J. (VerfasserIn) , Hoffmann, Helene (VerfasserIn) , Wagenbach, Dietmar (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: 14 May 2013
In: Journal of geophysical research. Atmospheres
Year: 2013, Jahrgang: 118, Heft: 9, Pages: 3879-3890
ISSN:2169-8996
DOI:10.1002/jgrd.50202
Online-Zugang:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1002/jgrd.50202
Verlag, lizenzpflichtig, Volltext: https://onlinelibrary.wiley.com/doi/abs/10.1002/jgrd.50202
Volltext
Verfasserangaben:M. Legrand, S. Preunkert, B. May, J. Guilhermet, H. Hoffman, and D. Wagenbach
Beschreibung
Zusammenfassung:Dissolved organic carbon (DOC) and an extended array of organic compounds were investigated in an Alpine ice core covering the 1920-1988 time period. Based on this, a reconstruction was made of the long-term trends of water-soluble organic carbon (WSOC) aerosol in the European atmosphere. It is shown that light mono- and dicarboxylates, humic-like substances, and formaldehyde account together for more than half of the DOC content of ice. This extended chemical speciation of DOC is used to estimate the DOC fraction present in ice that is related to WSOC aerosol and its change over the past. It is suggested that after World War II, the WSOC levels have been enhanced by a factor of 2 and 3 in winter and summer, respectively. In summer, the fossil fuel contribution to the enhancement is estimated to be rather small, suggesting that it arises mainly from an increase in biogenic sources of WSOC.
Beschreibung:Dieser Artikel ist eine Ergänzung zu May et al. [2013] doi:10.1002/jgrd.50200 und Guilhermet et al. [2013] doi:10.1002/jgrd.50201
Gesehen am 25.11.2021
Beschreibung:Online Resource
ISSN:2169-8996
DOI:10.1002/jgrd.50202

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