Academic Journal
500 000-year-old basal ice at Skytrain Ice Rise, West Antarctica, estimated with the 36Cl/10Be ratio
| Title: | 500 000-year-old basal ice at Skytrain Ice Rise, West Antarctica, estimated with the 36Cl/10Be ratio |
|---|---|
| Authors: | Kappelt, Niklas, Wolff, Eric W., Christl, Marcus, Vockenhuber, Christof, Gautschi, Philip, Muscheler, Raimund |
| Contributors: | Lund University, Profile areas and other strong research environments, Strategic research areas (SRA), MERGE: ModElling the Regional and Global Earth system, Lunds universitet, Profilområden och andra starka forskningsmiljöer, Strategiska forskningsområden (SFO), MERGE: ModElling the Regional and Global Earth system, Originator, Lund University, Faculty of Science, Department of Geology, Lunds universitet, Naturvetenskapliga fakulteten, Geologiska institutionen, Originator, Lund University, Profile areas and other strong research environments, Strategic research areas (SRA), BECC: Biodiversity and Ecosystem services in a Changing Climate, Lunds universitet, Profilområden och andra starka forskningsmiljöer, Strategiska forskningsområden (SFO), BECC: Biodiversity and Ecosystem services in a Changing Climate, Originator |
| Source: | Climate of the Past Dating Ice Cores with the 36Cl/10Be Ratio. 21(9):1585-1594 |
| Subject Terms: | Natural Sciences, Earth and Related Environmental Sciences, Multidisciplinary Geosciences, Naturvetenskap, Geovetenskap och relaterad miljövetenskap, Multidisciplinär geovetenskap |
| Description: | Dating the bottommost section of an ice core is often complicated by strong layer thinning and possible disturbances in the stratigraphy. The radioactive decay of atmospherically produced 36Cl and 10Be can provide age estimates, where traditional methods can no longer be used. In this study, we investigated ice from the bottom of the Skytrain ice core, which was drilled in West Antarctica next to the Ronne Ice Shelf and has previously been dated to 126 kyr BP about 24 m above bedrock. Apart from decay, radionuclide concentrations in ice can be influenced by production rate variations, atmospheric transport and deposition variations, and, at low accumulations sites, by chlorine loss through hydrogen chloride outgassing. Using the 36Cl/10Be ratio largely removes production related variations and we were able to confirm that no 36Cl loss occurs at Skytrain Ice Rise, as the nuclear weapon test caused peak in 36Cl concentrations was found at the expected depth corresponding to the 1950s and 1960s. An analysis of samples with known age showed that individual radionuclide concentrations and the 36Cl/ 10Be ratio are negatively correlated to the δ18O signal, which was used to apply a climate correction that enabled a higher precision for age estimates of previously undated samples by reducing the uncertainty of the initial ratio from 14 % to 9 %. The deepest analysed section of the Skytrain ice core was found to be 561 (+110 -109) kyr old. |
| Access URL: | https://doi.org/10.5194/cp-21-1585-2025 |
| Database: | SwePub |
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| Items | – Name: Title Label: Title Group: Ti Data: 500 000-year-old basal ice at Skytrain Ice Rise, West Antarctica, estimated with the 36Cl/10Be ratio – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Kappelt%2C+Niklas%22">Kappelt, Niklas</searchLink><br /><searchLink fieldCode="AR" term="%22Wolff%2C+Eric+W%2E%22">Wolff, Eric W.</searchLink><br /><searchLink fieldCode="AR" term="%22Christl%2C+Marcus%22">Christl, Marcus</searchLink><br /><searchLink fieldCode="AR" term="%22Vockenhuber%2C+Christof%22">Vockenhuber, Christof</searchLink><br /><searchLink fieldCode="AR" term="%22Gautschi%2C+Philip%22">Gautschi, Philip</searchLink><br /><searchLink fieldCode="AR" term="%22Muscheler%2C+Raimund%22">Muscheler, Raimund</searchLink> – Name: Author Label: Contributors Group: Au Data: Lund University, Profile areas and other strong research environments, Strategic research areas (SRA), MERGE: ModElling the Regional and Global Earth system, Lunds universitet, Profilområden och andra starka forskningsmiljöer, Strategiska forskningsområden (SFO), MERGE: ModElling the Regional and Global Earth system, Originator<br />Lund University, Faculty of Science, Department of Geology, Lunds universitet, Naturvetenskapliga fakulteten, Geologiska institutionen, Originator<br />Lund University, Profile areas and other strong research environments, Strategic research areas (SRA), BECC: Biodiversity and Ecosystem services in a Changing Climate, Lunds universitet, Profilområden och andra starka forskningsmiljöer, Strategiska forskningsområden (SFO), BECC: Biodiversity and Ecosystem services in a Changing Climate, Originator – Name: TitleSource Label: Source Group: Src Data: <i>Climate of the Past Dating Ice Cores with the 36Cl/10Be Ratio</i>. 21(9):1585-1594 – Name: Subject Label: Subject Terms Group: Su Data: <searchLink fieldCode="DE" term="%22Natural+Sciences%22">Natural Sciences</searchLink><br /><searchLink fieldCode="DE" term="%22Earth+and+Related+Environmental+Sciences%22">Earth and Related Environmental Sciences</searchLink><br /><searchLink fieldCode="DE" term="%22Multidisciplinary+Geosciences%22">Multidisciplinary Geosciences</searchLink><br /><searchLink fieldCode="DE" term="%22Naturvetenskap%22">Naturvetenskap</searchLink><br /><searchLink fieldCode="DE" term="%22Geovetenskap+och+relaterad+miljövetenskap%22">Geovetenskap och relaterad miljövetenskap</searchLink><br /><searchLink fieldCode="DE" term="%22Multidisciplinär+geovetenskap%22">Multidisciplinär geovetenskap</searchLink> – Name: Abstract Label: Description Group: Ab Data: Dating the bottommost section of an ice core is often complicated by strong layer thinning and possible disturbances in the stratigraphy. The radioactive decay of atmospherically produced 36Cl and 10Be can provide age estimates, where traditional methods can no longer be used. In this study, we investigated ice from the bottom of the Skytrain ice core, which was drilled in West Antarctica next to the Ronne Ice Shelf and has previously been dated to 126 kyr BP about 24 m above bedrock. Apart from decay, radionuclide concentrations in ice can be influenced by production rate variations, atmospheric transport and deposition variations, and, at low accumulations sites, by chlorine loss through hydrogen chloride outgassing. Using the 36Cl/10Be ratio largely removes production related variations and we were able to confirm that no 36Cl loss occurs at Skytrain Ice Rise, as the nuclear weapon test caused peak in 36Cl concentrations was found at the expected depth corresponding to the 1950s and 1960s. An analysis of samples with known age showed that individual radionuclide concentrations and the 36Cl/ 10Be ratio are negatively correlated to the δ18O signal, which was used to apply a climate correction that enabled a higher precision for age estimates of previously undated samples by reducing the uncertainty of the initial ratio from 14 % to 9 %. The deepest analysed section of the Skytrain ice core was found to be 561 (+110 -109) kyr old. – Name: URL Label: Access URL Group: URL Data: <link linkTarget="URL" linkTerm="https://doi.org/10.5194/cp-21-1585-2025" linkWindow="_blank">https://doi.org/10.5194/cp-21-1585-2025</link> |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.5194/cp-21-1585-2025 Languages: – Text: English PhysicalDescription: Pagination: PageCount: 10 StartPage: 1585 Subjects: – SubjectFull: Natural Sciences Type: general – SubjectFull: Earth and Related Environmental Sciences Type: general – SubjectFull: Multidisciplinary Geosciences Type: general – SubjectFull: Naturvetenskap Type: general – SubjectFull: Geovetenskap och relaterad miljövetenskap Type: general – SubjectFull: Multidisciplinär geovetenskap Type: general Titles: – TitleFull: 500 000-year-old basal ice at Skytrain Ice Rise, West Antarctica, estimated with the 36Cl/10Be ratio Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Kappelt, Niklas – PersonEntity: Name: NameFull: Wolff, Eric W. – PersonEntity: Name: NameFull: Christl, Marcus – PersonEntity: Name: NameFull: Vockenhuber, Christof – PersonEntity: Name: NameFull: Gautschi, Philip – PersonEntity: Name: NameFull: Muscheler, Raimund – PersonEntity: Name: NameFull: Lund University, Profile areas and other strong research environments, Strategic research areas (SRA), MERGE: ModElling the Regional and Global Earth system, Lunds universitet, Profilområden och andra starka forskningsmiljöer, Strategiska forskningsområden (SFO), MERGE: ModElling the Regional and Global Earth system, Originator – PersonEntity: Name: NameFull: Lund University, Faculty of Science, Department of Geology, Lunds universitet, Naturvetenskapliga fakulteten, Geologiska institutionen, Originator – PersonEntity: Name: NameFull: Lund University, Profile areas and other strong research environments, Strategic research areas (SRA), BECC: Biodiversity and Ecosystem services in a Changing Climate, Lunds universitet, Profilområden och andra starka forskningsmiljöer, Strategiska forskningsområden (SFO), BECC: Biodiversity and Ecosystem services in a Changing Climate, Originator IsPartOfRelationships: – BibEntity: Dates: – D: 11 M: 09 Type: published Y: 2025 Identifiers: – Type: issn-print Value: 18149332 – Type: issn-locals Value: SWEPUB_FREE – Type: issn-locals Value: LU_SWEPUB Numbering: – Type: volume Value: 21 – Type: issue Value: 9 Titles: – TitleFull: Climate of the Past Dating Ice Cores with the 36Cl/10Be Ratio Type: main |
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