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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
Medientyp Artikel
Sprache Englisch
Digitales Dokument PDF
Erschienen In: GRA - Volume 12 (2010)
Datensatznummer 250043675
 
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.