The potential for a continuous 10Be record measured on ice chips from a borehole
Ice cores are excellent archives for obtaining long and continuous 10Be records. However, traditional ice core 10Be measurements required a lot of ice (0.5–1kg) and often needed to be connected to a large and costly ice core project. These reasons have been the factors limiting the number and variet...
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ftdoajarticles:oai:doaj.org/article:88a2a4fa9c2040bbb31826aa563b485c 2023-05-15T13:37:34+02:00 The potential for a continuous 10Be record measured on ice chips from a borehole Long Nguyen Chiara I. Paleari Stefanie Müller Marcus Christl Florian Mekhaldi Philip Gautschi Robert Mulvaney Julius Rix Raimund Muscheler 2021-10-01T00:00:00Z https://doi.org/10.1016/j.ringeo.2021.100012 https://doaj.org/article/88a2a4fa9c2040bbb31826aa563b485c EN eng Elsevier http://www.sciencedirect.com/science/article/pii/S2666277921000058 https://doaj.org/toc/2666-2779 2666-2779 doi:10.1016/j.ringeo.2021.100012 https://doaj.org/article/88a2a4fa9c2040bbb31826aa563b485c Results in Geochemistry, Vol 5, Iss , Pp 100012- (2021) AMS Sample preparation Beryllium 10 Ice core Solar activity Chemistry QD1-999 Geology QE1-996.5 article 2021 ftdoajarticles https://doi.org/10.1016/j.ringeo.2021.100012 2022-12-31T09:46:47Z Ice cores are excellent archives for obtaining long and continuous 10Be records. However, traditional ice core 10Be measurements required a lot of ice (0.5–1kg) and often needed to be connected to a large and costly ice core project. These reasons have been the factors limiting the number and variety of 10Be projects and data. In this paper, we show measurements of 10Be on small samples (∼45g) of continuous auger ice chips from a borehole at Little Dome C (LDC), East Antarctica. The sample preparation method for 10Be accelerator mass spectrometry (AMS) was tested and optimized using test samples (∼50g) including well-mixed surface ice chips from the LDC site, snow collected in Lund (Sweden) and frozen Milli-Q water. The results show that our small ice samples should be processed without ion exchange filtration of the melt water and cleaning the subsequent Be(OH)2 precipitate. In addition, co-precipitating Be with Fe led to more reproducible measurement currents and offer the potential for higher efficiency and precision via longer measurement time. We applied the established preparation method to measure 10Be on 76 samples of the auger ice chips. The resulting 10Be concentration record for the period from 1354 to 1950 CE agrees well with the 10Be concentration in a South Pole ice core and the global 14C production rate and thus reflects well the atmospheric production signal of 10Be. We also observed insignificant mixing among the ice chip samples during the process of drilling and retrieving the ice. Therefore, the new ice chip samples are promising for assessing the long-term changes in 10Be deposition at different ice core sites. A wide application of this novel ice chip samples will increase the variety of 10Be records which will help to improve the assessment of long-term solar and geomagnetic shielding of galactic cosmic rays. Article in Journal/Newspaper Antarc* Antarctica East Antarctica ice core South pole South pole Directory of Open Access Journals: DOAJ Articles East Antarctica South Pole Results in Geochemistry 5 100012 |
institution |
Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
AMS Sample preparation Beryllium 10 Ice core Solar activity Chemistry QD1-999 Geology QE1-996.5 |
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AMS Sample preparation Beryllium 10 Ice core Solar activity Chemistry QD1-999 Geology QE1-996.5 Long Nguyen Chiara I. Paleari Stefanie Müller Marcus Christl Florian Mekhaldi Philip Gautschi Robert Mulvaney Julius Rix Raimund Muscheler The potential for a continuous 10Be record measured on ice chips from a borehole |
topic_facet |
AMS Sample preparation Beryllium 10 Ice core Solar activity Chemistry QD1-999 Geology QE1-996.5 |
description |
Ice cores are excellent archives for obtaining long and continuous 10Be records. However, traditional ice core 10Be measurements required a lot of ice (0.5–1kg) and often needed to be connected to a large and costly ice core project. These reasons have been the factors limiting the number and variety of 10Be projects and data. In this paper, we show measurements of 10Be on small samples (∼45g) of continuous auger ice chips from a borehole at Little Dome C (LDC), East Antarctica. The sample preparation method for 10Be accelerator mass spectrometry (AMS) was tested and optimized using test samples (∼50g) including well-mixed surface ice chips from the LDC site, snow collected in Lund (Sweden) and frozen Milli-Q water. The results show that our small ice samples should be processed without ion exchange filtration of the melt water and cleaning the subsequent Be(OH)2 precipitate. In addition, co-precipitating Be with Fe led to more reproducible measurement currents and offer the potential for higher efficiency and precision via longer measurement time. We applied the established preparation method to measure 10Be on 76 samples of the auger ice chips. The resulting 10Be concentration record for the period from 1354 to 1950 CE agrees well with the 10Be concentration in a South Pole ice core and the global 14C production rate and thus reflects well the atmospheric production signal of 10Be. We also observed insignificant mixing among the ice chip samples during the process of drilling and retrieving the ice. Therefore, the new ice chip samples are promising for assessing the long-term changes in 10Be deposition at different ice core sites. A wide application of this novel ice chip samples will increase the variety of 10Be records which will help to improve the assessment of long-term solar and geomagnetic shielding of galactic cosmic rays. |
format |
Article in Journal/Newspaper |
author |
Long Nguyen Chiara I. Paleari Stefanie Müller Marcus Christl Florian Mekhaldi Philip Gautschi Robert Mulvaney Julius Rix Raimund Muscheler |
author_facet |
Long Nguyen Chiara I. Paleari Stefanie Müller Marcus Christl Florian Mekhaldi Philip Gautschi Robert Mulvaney Julius Rix Raimund Muscheler |
author_sort |
Long Nguyen |
title |
The potential for a continuous 10Be record measured on ice chips from a borehole |
title_short |
The potential for a continuous 10Be record measured on ice chips from a borehole |
title_full |
The potential for a continuous 10Be record measured on ice chips from a borehole |
title_fullStr |
The potential for a continuous 10Be record measured on ice chips from a borehole |
title_full_unstemmed |
The potential for a continuous 10Be record measured on ice chips from a borehole |
title_sort |
potential for a continuous 10be record measured on ice chips from a borehole |
publisher |
Elsevier |
publishDate |
2021 |
url |
https://doi.org/10.1016/j.ringeo.2021.100012 https://doaj.org/article/88a2a4fa9c2040bbb31826aa563b485c |
geographic |
East Antarctica South Pole |
geographic_facet |
East Antarctica South Pole |
genre |
Antarc* Antarctica East Antarctica ice core South pole South pole |
genre_facet |
Antarc* Antarctica East Antarctica ice core South pole South pole |
op_source |
Results in Geochemistry, Vol 5, Iss , Pp 100012- (2021) |
op_relation |
http://www.sciencedirect.com/science/article/pii/S2666277921000058 https://doaj.org/toc/2666-2779 2666-2779 doi:10.1016/j.ringeo.2021.100012 https://doaj.org/article/88a2a4fa9c2040bbb31826aa563b485c |
op_doi |
https://doi.org/10.1016/j.ringeo.2021.100012 |
container_title |
Results in Geochemistry |
container_volume |
5 |
container_start_page |
100012 |
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1766094372591370240 |