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| Titel |
10Be in ice - four decades, two ice sheets, 15 deep coring sites |
| VerfasserIn |
Ann-Marie Berggren, Ala Aldahan, Göran Possnert |
| Konferenz |
EGU General Assembly 2010
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 12 (2010) |
| Datensatznummer |
250041420
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| Zusammenfassung |
| Over the last few decades, numerous studies of 10Be in ice cores from Antarctica and
Greenland have comprised a significant source of information on climate, solar activity and
geomagnetic field intensity over the past 800 000 years. There is, however, a large variability
in the available 10Be records in terms of resolution and time coverage. We here present a
comprehensive summary of results that have been put forward since the 1960s. Marine
sediment was the first type of natural archive in which 10Be was detected (Arnold, 1956), and
a decade later McCorkell et al. (1967) pioneered the ice archive field by counting 10Be beta
activity in samples from Camp Century, Greenland. The method demands a large amount of
material; in this case 1.2Ã106 litres of water were used. Using accelerator mass
spectrometry, AMS, Raisbeck et al. (1978) undertook the second study of 10Be in
polar ice, measuring 10Be concentrations in ice from Dome C, Antarctica. The
AMS technique is exclusively used today for measurements of 10Be in small ice
volumes ( |
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