Major 20th century changes of the content and chemical speciation of organic carbon archived in Alpine ice cores

• Verfasst von: Legrand, Michel [VerfasserIn]
• Verfasst von: Preunkert, S. [VerfasserIn]
• Verfasst von: May, Barbara Luise [VerfasserIn]
• Verfasst von: Guilhermet, J. [VerfasserIn]
• Verfasst von: Hoffmann, Helene [VerfasserIn]
• Verfasst von: Wagenbach, Dietmar [VerfasserIn]
• Titel: Major 20th century changes of the content and chemical speciation of organic carbon archived in Alpine ice cores
• Titelzusatz: implications for the long-term change of organic aerosol over Europe
• Verf.angabe: M. Legrand, S. Preunkert, B. May, J. Guilhermet, H. Hoffman, and D. Wagenbach
• E-Jahr: 2013
• Jahr: 14 May 2013
• Umfang: 12 S.
• Fussnoten: 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
• Titel Quelle: Enthalten in: JGR. Atmospheres
• Ort Quelle: Hoboken, NJ : Wiley, 2013
• Jahr Quelle: 2013
• Band/Heft Quelle: 118(2013), 9 vom: Mai, Seite 3879-3890
• ISSN Quelle: 2169-8996
• DOI: doi:10.1002/jgrd.50202
• Datenträger: Online-Ressource
• Sprache: eng
• Bibliogr. Hinweis: Ergänzung zu: May, Barbara Luise: Constraints on the major sources of dissolved organic carbon in Alpine ice cores from radiocarbon analysis over the bomb-peak period
• Bibliogr. Hinweis: Ergänzung zu: Major 20th century changes of water-soluble humic-like substances (HULISWS) aerosol over Europe inferred from Alpine ice cores$lGuilhermet, Julien
• Sach-SW: Alpine ice core
• Sach-SW: dissolved organic carbon
• Sach-SW: organic aerosol
• K10plus-PPN: 1779072546

Abstract

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.