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Evaluating the 11-y...
Evaluating the 11-year solar cycle and short-Term 10Be deposition events with novel excess water samples from the East Greenland Ice-core Project (EGRIP)
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- Paleari, Chiara I. (författare)
- Lund University,Lunds universitet,MERGE: ModElling the Regional and Global Earth system,Centrum för miljö- och klimatvetenskap (CEC),Naturvetenskapliga fakulteten,Kvartärgeologi,Geologiska institutionen,Centre for Environmental and Climate Science (CEC),Faculty of Science,Quaternary Sciences,Department of Geology
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- Mekhaldi, Florian (författare)
- Lund University,Lunds universitet,MERGE: ModElling the Regional and Global Earth system,Centrum för miljö- och klimatvetenskap (CEC),Naturvetenskapliga fakulteten,Kvartärgeologi,Geologiska institutionen,Centre for Environmental and Climate Science (CEC),Faculty of Science,Quaternary Sciences,Department of Geology,British Antarctic Survey
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- Erhardt, Tobias (författare)
- Alfred-Wegener Institute, Helmholtz Center for Polar and Marine Research, Bremerhaven,University of Bern
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- Zheng, Minjie (författare)
- Lund University,Lunds universitet,Kvartärgeologi,Geologiska institutionen,Naturvetenskapliga fakulteten,Quaternary Sciences,Department of Geology,Faculty of Science,ETH Zürich
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- Christl, Marcus (författare)
- ETH Zürich
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- Adolphi, Florian (författare)
- University of Bremen,Alfred-Wegener Institute, Helmholtz Center for Polar and Marine Research, Bremerhaven
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- Hörhold, Maria (författare)
- Alfred-Wegener Institute, Helmholtz Center for Polar and Marine Research, Bremerhaven
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- Muscheler, Raimund (författare)
- Lund University,Lunds universitet,MERGE: ModElling the Regional and Global Earth system,Centrum för miljö- och klimatvetenskap (CEC),Naturvetenskapliga fakulteten,Kvartärgeologi,Geologiska institutionen,Centre for Environmental and Climate Science (CEC),Faculty of Science,Quaternary Sciences,Department of Geology
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(creator_code:org_t)
- 2023
- 2023
- Engelska 14 s.
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Ingår i: Climate of the Past. - 1814-9324. ; 19:11, s. 2409-2422
- Relaterad länk:
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http://dx.doi.org/10... (free)
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https://lup.lub.lu.s...
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https://doi.org/10.5...
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Abstract
Ämnesord
Stäng
- 10Be is produced by the interaction between galactic cosmic rays (GCRs) and solar energetic particles (SEPs) with the Earth's atmospheric constituents. The flux of GCRs is modulated by the varying strength of the magnetic fields of the Earth and the Sun. Measurement of 10Be concentrations from polar ice cores is thus a valuable tool to reconstruct the variations in the geomagnetic field and solar activity levels. The interpretation of 10Be records is, however, complicated by non-production-related effects on the 10Be deposition rate caused by climate-or weather-induced variability. Furthermore, volcanic eruptions have been proposed to lead to short-Term 10Be deposition enhancements. In this study, we test the use of excess meltwater from continuous flow analysis (CFA) to measure 10Be, allowing less time-consuming and more cost-effective sample preparation. We compare two records obtained from CFA and discrete samples from the East Greenland Ice core Project (EGRIP) S6 firn core, reaching back to 1900gCE. We find that the two records agree well and that the 10Be record from CFA samples agrees as well as the discrete samples with other records from Greenland. Furthermore, by subtracting the theoretically expected GCR-induced signal, we investigate the high-frequency variability in the 10Be records from Greenland and Antarctica after 1951gCE, focusing on SEP events and volcanic eruptions. Finally, we use the 10Be records from Greenland and Antarctica to study the 11-year solar cycles, allowing us to assess the suitability of the CFA samples for the reconstruction of solar activity. This result opens new opportunities for the collection of continuous 10Be records with less time-consuming sample preparation, while saving an important portion of the ice cores for other measurements.
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Geologi (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Geology (hsv//eng)
Publikations- och innehållstyp
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