Simulating ice core 10 Be on the glacial–interglacial timescale
10 Be ice core measurements are an important tool for paleoclimate research, e.g., allowing for the reconstruction of past solar activity or changes in the geomagnetic dipole field. However, especially on multi-millennial timescales, the share of production and climate-induced variations of respecti...
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ftdoajarticles:oai:doaj.org/article:4bd4db04215c41c1b58ad8307174e94f 2023-05-15T16:27:48+02:00 Simulating ice core 10 Be on the glacial–interglacial timescale C. Elsässer D. Wagenbach I. Levin A. Stanzick M. Christl A. Wallner S. Kipfstuhl I. K. Seierstad H. Wershofen J. Dibb 2015-02-01T00:00:00Z https://doi.org/10.5194/cp-11-115-2015 https://doaj.org/article/4bd4db04215c41c1b58ad8307174e94f EN eng Copernicus Publications http://www.clim-past.net/11/115/2015/cp-11-115-2015.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 1814-9324 1814-9332 doi:10.5194/cp-11-115-2015 https://doaj.org/article/4bd4db04215c41c1b58ad8307174e94f Climate of the Past, Vol 11, Iss 2, Pp 115-133 (2015) Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 article 2015 ftdoajarticles https://doi.org/10.5194/cp-11-115-2015 2022-12-31T15:40:46Z 10 Be ice core measurements are an important tool for paleoclimate research, e.g., allowing for the reconstruction of past solar activity or changes in the geomagnetic dipole field. However, especially on multi-millennial timescales, the share of production and climate-induced variations of respective 10 Be ice core records is still up for debate. Here we present the first quantitative climatological model of the 10 Be ice concentration up to the glacial–interglacial timescale. The model approach is composed of (i) a coarse resolution global atmospheric transport model and (ii) a local 10 Be air–firn transfer model. Extensive global-scale observational data of short-lived radionuclides as well as new polar 10 Be snow-pit measurements are used for model calibration and validation. Being specifically configured for 10 Be in polar ice, this tool thus allows for a straightforward investigation of production- and non-production-related modulation of this nuclide. We find that the polar 10 Be ice concentration does not immediately record the globally mixed cosmogenic production signal. Using geomagnetic modulation and revised Greenland snow accumulation rate changes as model input, we simulate the observed Greenland Summit (GRIP and GISP2) 10 Be ice core records over the last 75 kyr (on the GICC05modelext timescale). We show that our basic model is capable of reproducing the largest portion of the observed 10 Be changes. However, model–measurement differences exhibit multi-millennial trends (differences up to 87% in case of normalized to the Holocene records) which call for closer investigation. Focusing on the (12–37) b2k (before the year AD 2000) period, mean model–measurement differences of 30% cannot be attributed to production changes. However, unconsidered climate-induced changes could likely explain the model–measurement mismatch. In fact, the 10 Be ice concentration is very sensitive to snow accumulation changes. Here the reconstructed Greenland Summit (GRIP) snow accumulation rate record would require ... Article in Journal/Newspaper Greenland GRIP ice core Directory of Open Access Journals: DOAJ Articles Greenland Climate of the Past 11 2 115 133 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
language |
English |
topic |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
spellingShingle |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 C. Elsässer D. Wagenbach I. Levin A. Stanzick M. Christl A. Wallner S. Kipfstuhl I. K. Seierstad H. Wershofen J. Dibb Simulating ice core 10 Be on the glacial–interglacial timescale |
topic_facet |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
description |
10 Be ice core measurements are an important tool for paleoclimate research, e.g., allowing for the reconstruction of past solar activity or changes in the geomagnetic dipole field. However, especially on multi-millennial timescales, the share of production and climate-induced variations of respective 10 Be ice core records is still up for debate. Here we present the first quantitative climatological model of the 10 Be ice concentration up to the glacial–interglacial timescale. The model approach is composed of (i) a coarse resolution global atmospheric transport model and (ii) a local 10 Be air–firn transfer model. Extensive global-scale observational data of short-lived radionuclides as well as new polar 10 Be snow-pit measurements are used for model calibration and validation. Being specifically configured for 10 Be in polar ice, this tool thus allows for a straightforward investigation of production- and non-production-related modulation of this nuclide. We find that the polar 10 Be ice concentration does not immediately record the globally mixed cosmogenic production signal. Using geomagnetic modulation and revised Greenland snow accumulation rate changes as model input, we simulate the observed Greenland Summit (GRIP and GISP2) 10 Be ice core records over the last 75 kyr (on the GICC05modelext timescale). We show that our basic model is capable of reproducing the largest portion of the observed 10 Be changes. However, model–measurement differences exhibit multi-millennial trends (differences up to 87% in case of normalized to the Holocene records) which call for closer investigation. Focusing on the (12–37) b2k (before the year AD 2000) period, mean model–measurement differences of 30% cannot be attributed to production changes. However, unconsidered climate-induced changes could likely explain the model–measurement mismatch. In fact, the 10 Be ice concentration is very sensitive to snow accumulation changes. Here the reconstructed Greenland Summit (GRIP) snow accumulation rate record would require ... |
format |
Article in Journal/Newspaper |
author |
C. Elsässer D. Wagenbach I. Levin A. Stanzick M. Christl A. Wallner S. Kipfstuhl I. K. Seierstad H. Wershofen J. Dibb |
author_facet |
C. Elsässer D. Wagenbach I. Levin A. Stanzick M. Christl A. Wallner S. Kipfstuhl I. K. Seierstad H. Wershofen J. Dibb |
author_sort |
C. Elsässer |
title |
Simulating ice core 10 Be on the glacial–interglacial timescale |
title_short |
Simulating ice core 10 Be on the glacial–interglacial timescale |
title_full |
Simulating ice core 10 Be on the glacial–interglacial timescale |
title_fullStr |
Simulating ice core 10 Be on the glacial–interglacial timescale |
title_full_unstemmed |
Simulating ice core 10 Be on the glacial–interglacial timescale |
title_sort |
simulating ice core 10 be on the glacial–interglacial timescale |
publisher |
Copernicus Publications |
publishDate |
2015 |
url |
https://doi.org/10.5194/cp-11-115-2015 https://doaj.org/article/4bd4db04215c41c1b58ad8307174e94f |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland GRIP ice core |
genre_facet |
Greenland GRIP ice core |
op_source |
Climate of the Past, Vol 11, Iss 2, Pp 115-133 (2015) |
op_relation |
http://www.clim-past.net/11/115/2015/cp-11-115-2015.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 1814-9324 1814-9332 doi:10.5194/cp-11-115-2015 https://doaj.org/article/4bd4db04215c41c1b58ad8307174e94f |
op_doi |
https://doi.org/10.5194/cp-11-115-2015 |
container_title |
Climate of the Past |
container_volume |
11 |
container_issue |
2 |
container_start_page |
115 |
op_container_end_page |
133 |
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1766017308599255040 |