Major 20th century changes of carbonaceous aerosol components (EC, WinOC, DOC, HULIS, carboxylic acids, and cellulose) derived from Alpine ice cores

Michel Legrand, Susanne Preunkert, M. Schock, M. Cerqueira, Anne Kasper-Giebl, J. Afonso, Casimiro A. Pio, A. Gelencsér, I. Dombrowski-Etchevers

Research output: Contribution to journalArticle

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Abstract

An extended array of carbonaceous species including elemental carbon (EC), water insoluble organic carbon (WinOC) as well as dissolved organic carbon (DOC), humic-like substances (HULIS), and single organic compounds like carboxylic acids, levoglucosan, and cellulose, was investigated for the first time in Alpine snow deposits. These investigations were done on selected discrete ice cores sections extracted from Mount Rosa and Mount Blanc glaciers covering the 20th century and extending back to previous centuries. Here we focus on major changes in summer ice layers. Among carbonaceous components, EC reveals an outstanding increase with a sharp summer increase after World War II. This result is discussed against available past EC emission inventories in Europe which are thought to be mainly driven by emissions from road transport and residential sector. The long-term trend of organic carbon (OC) aerosol preserved in ice, WinOC as well as water soluble organic carbon (WSOC), was successfully reconstructed using the suitable array of organic compounds we investigated in this study. It is shown that the level of OC preserved in ice has increased by a factor of 2 after 1950 likely as a result of the enhancement of the oxidative capacity of the atmosphere over the last decades producing more secondary organic atmospheric aerosol from biogenic gaseous precursors.

Original languageEnglish
Article numberD23S11
JournalJournal of Geophysical Research: Space Physics
Volume112
Issue number23
DOIs
Publication statusPublished - Dec 16 2007

Fingerprint

Ice
carboxylic acid
carboxylic acids
Carboxylic Acids
Organic carbon
aerosols
dissolved organic carbon
Aerosols
ice core
cellulose
Cellulose
ice
Carbon
organic carbon
aerosol
Water
carbon
water
organic compound
Organic compounds

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Atmospheric Science
  • Astronomy and Astrophysics
  • Oceanography

Cite this

Major 20th century changes of carbonaceous aerosol components (EC, WinOC, DOC, HULIS, carboxylic acids, and cellulose) derived from Alpine ice cores. / Legrand, Michel; Preunkert, Susanne; Schock, M.; Cerqueira, M.; Kasper-Giebl, Anne; Afonso, J.; Pio, Casimiro A.; Gelencsér, A.; Dombrowski-Etchevers, I.

In: Journal of Geophysical Research: Space Physics, Vol. 112, No. 23, D23S11, 16.12.2007.

Research output: Contribution to journalArticle

Legrand, Michel ; Preunkert, Susanne ; Schock, M. ; Cerqueira, M. ; Kasper-Giebl, Anne ; Afonso, J. ; Pio, Casimiro A. ; Gelencsér, A. ; Dombrowski-Etchevers, I. / Major 20th century changes of carbonaceous aerosol components (EC, WinOC, DOC, HULIS, carboxylic acids, and cellulose) derived from Alpine ice cores. In: Journal of Geophysical Research: Space Physics. 2007 ; Vol. 112, No. 23.
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