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Titel |
Geomagnetic modulation extracted from cosmogenic Be-10 kyr in highly accumulating Atlantic drift deposits |
VerfasserIn |
Marcus Christl, Jörg Lippold, Friedhelm Steinhilber, Frank Bernsdorff, Augusto Mangini |
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 |
250043675
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Zusammenfassung |
We present a reconstruction of the global 10Be production rate over the past 250,000 years
from three highly accumulating marine sediment cores located in the North-, Northwest-, and
South Atlantic Ocean (ODP-Sites 983, 1063 and 1089). The 10Be-records are cleaned up for
oceanic transport processes and Principal Component Analysis (PCA) is used to
extract the common signal that reflects variations of the global 10Be production rate.
This reconstruction, thus, serves as (i) a record of past flux of Galactic Cosmic
Rays (GCR), (ii) a proxy for past geomagnetic dipole strength, and (iii) as a global
matching tool to synchronize marine archives with ice cores and terrestrial records. |
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