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)
Paleari, Chiara I. LU ; Mekhaldi, Florian LU ; Erhardt, Tobias ; Zheng, Minjie LU ; Christl, Marcus ; Adolphi, Florian LU ; Hörhold, Maria and Muscheler, Raimund LU
(2023)
In Climate of the Past
19(11).
p.2409-2422
- Abstract
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... (More)
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.
(Less)
- author
- Paleari, Chiara I.
LU
; Mekhaldi, Florian
LU
; Erhardt, Tobias
; Zheng, Minjie
LU
; Christl, Marcus
; Adolphi, Florian
LU
; Hörhold, Maria
and Muscheler, Raimund
LU
- organization
- publishing date
- 2023-11
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Climate of the Past
- volume
- 19
- issue
- 11
- pages
- 14 pages
- publisher
- Copernicus GmbH
- external identifiers
-
- scopus:85179414074
- ISSN
- 1814-9324
- DOI
- 10.5194/cp-19-2409-2023
- language
- English
- LU publication?
- yes
- id
- c7e15ac8-d5ab-4965-bf97-aec866a22e4a
- date added to LUP
- 2024-01-09 14:41:22
- date last changed
- 2024-01-09 14:42:12
@article{c7e15ac8-d5ab-4965-bf97-aec866a22e4a,
abstract = {{<p>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.</p>}},
author = {{Paleari, Chiara I. and Mekhaldi, Florian and Erhardt, Tobias and Zheng, Minjie and Christl, Marcus and Adolphi, Florian and Hörhold, Maria and Muscheler, Raimund}},
issn = {{1814-9324}},
language = {{eng}},
number = {{11}},
pages = {{2409--2422}},
publisher = {{Copernicus GmbH}},
series = {{Climate of the Past}},
title = {{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)}},
url = {{http://dx.doi.org/10.5194/cp-19-2409-2023}},
doi = {{10.5194/cp-19-2409-2023}},
volume = {{19}},
year = {{2023}},
}