The Influence of Orbital Forcing on Be-10 Deposition in Greenland Over the Glacial Period

Understanding the transport and deposition of the cosmogenic isotope Be-10 is vital for the application of the isotope data to infer past changes of solar activity, to reconstruct past Earth's magnetic field intensity and climate change. Here, we use data of the cosmogenic isotope Be-10 from th...

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Bibliographic Details
Published in:Frontiers in Earth Science
Main Authors: Sturevik-Storm, Anna, Zheng, Minjie, Aldahan, Ala, Possnert, Göran, Muscheler, Raimund
Format: Article in Journal/Newspaper
Language:English
Published: Uppsala universitet, Tillämpad kärnfysik 2021
Subjects:
orbital forcing
Be-10
atmospheric transport
aerosol
ice core
Greenland
glacial period
Climate Research
Klimatforskning
Geology
Geologi
Greenland ice cores
GRIP
Online Access:http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-466281
https://doi.org/10.3389/feart.2021.743640
Description
Summary:Understanding the transport and deposition of the cosmogenic isotope Be-10 is vital for the application of the isotope data to infer past changes of solar activity, to reconstruct past Earth's magnetic field intensity and climate change. Here, we use data of the cosmogenic isotope Be-10 from the Greenland ice cores, namely the NEEM and GRIP ice cores, to identify factors controlling its distribution. After removing the effects of the geomagnetic field on the cosmogenic radionuclide production rate, the results expose imprints of the 20-22 ka precession cycle on the Greenland Be-10 records of the last glacial period. This finding can further improve the understanding of Be-10 variability in ice sheets and has the prospect of providing better reconstructions of geomagnetic and solar activity based on cosmogenic radionuclide records.

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