Die u:cris Detailansicht:
Constraints on the major sources of dissolved organic carbon in Alpine ice cores from radiocarbon analysis over the bomb-peak period
- Autor(en)
- B. May, D. Wagenbach, Hannah Hoffmann, M. Legrand, S. Preunkert, P. Steier
- Abstrakt
[1] Radiocarbon (14C) has
proven to be a powerful tool in distinguishing modern and fossil fuel
sources contributing to organic aerosols. By applying this concept to
ice core records of the dissolved organic carbon (DOC) fraction, we
developed a setup dedicated to the extraction of DOC from Alpine ice
core samples for 14C microanalysis. With respect to the
difficulties and limitations of this analytical method, it is shown that
a total process blank mass of (6 ± 3) μgC with a 14C
signature of (0.71 ± 0.17) can be obtained, corresponding to a minimum
sample size between 200 g for industrial and 800 g for pre-industrial
ice. Radiocarbon analyses of eight DOC ice core samples from the high
accumulation glacier Col du Dôme (European Alps) were mainly performed
over the bomb-peak period. These data, being associated with snow
deposition over the summer half-years, show an overall mean fossil
contribution of (25 ± 9) %. Adaptation of the DO14C values to the atmospheric 14CO2
record revealed that the biogenic input to ice core DOC is associated
with a fast recycling biospheric component, likely linked to a turnover
time of less than 3 years.
- Organisation(en)
- Isotopenphysik
- Externe Organisation(en)
- Universität Heidelberg, Laboratoire de Glaciologie et Géophysique de l'Environnement (LGGE) UMR 5183
- Journal
- Journal of Geophysical Research: Atmospheres
- Band
- 118
- Seiten
- 3319-3327
- Anzahl der Seiten
- 9
- ISSN
- 2169-897X
- DOI
- https://doi.org/10.1002/jgrd.50200
- Publikationsdatum
- 04-2013
- Peer-reviewed
- Ja
- ÖFOS 2012
- 1030 Physik, Astronomie, 105205 Klimawandel, 104023 Umweltchemie
- Schlagwörter
- Sustainable Development Goals
- SDG 13 – Maßnahmen zum Klimaschutz
- Link zum Portal
- https://ucrisportal.univie.ac.at/de/publications/d689d27e-62c9-4851-94aa-61bb8dfd6bab