Sediment accumulation rates in subarctic lakes: Insights into age-depth modeling from 22 dated lake records from the Northwest Territories, Canada
Age-depth modeling using Bayesian statistics requires well-informed prior information about the behavior of sediment accumulation. Here we present average sediment accumulation rates (represented as deposition times, DT, in yr/cm) for lakes in an Arctic setting, and we examine the variability across...
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ftleedsuniv:oai:eprints.whiterose.ac.uk:84364 2023-05-15T15:10:41+02:00 Sediment accumulation rates in subarctic lakes: Insights into age-depth modeling from 22 dated lake records from the Northwest Territories, Canada Crann, CA Patterson, RT Macumber, AL Galloway, JM Roe, HM Blaauw, M Swindles, GT Falck, H 2015-04-01 text https://eprints.whiterose.ac.uk/84364/ https://eprints.whiterose.ac.uk/84364/1/Crann%202015%20Manu%20.pdf https://doi.org/10.1016/j.quageo.2015.02.001 en eng Elsevier https://eprints.whiterose.ac.uk/84364/1/Crann%202015%20Manu%20.pdf Crann, CA, Patterson, RT, Macumber, AL et al. (5 more authors) (2015) Sediment accumulation rates in subarctic lakes: Insights into age-depth modeling from 22 dated lake records from the Northwest Territories, Canada. Quaternary Geochronology, 27. 131 - 144. ISSN 1871-1014 Article PeerReviewed 2015 ftleedsuniv https://doi.org/10.1016/j.quageo.2015.02.001 2023-01-30T21:31:23Z Age-depth modeling using Bayesian statistics requires well-informed prior information about the behavior of sediment accumulation. Here we present average sediment accumulation rates (represented as deposition times, DT, in yr/cm) for lakes in an Arctic setting, and we examine the variability across space (intra- and inter-lake) and time (late Holocene). The dataset includes over 100 radiocarbon dates, primarily on bulk sediment, from 22 sediment cores obtained from 18 lakes spanning the boreal to tundra ecotone gradients in subarctic Canada. There are four to twenty-five radiocarbon dates per core, depending on the length and character of the sediment records. Deposition times were calculated at 100-year intervals from age-depth models constructed using the 'classical' age-depth modeling software Clam. Lakes in boreal settings have the most rapid accumulation (mean DT 20±10 yr/cm), whereas lakes in tundra settings accumulate at moderate (mean DT 70±10 yr/cm) to very slow rates, (>100yr/cm). Many of the age-depth models demonstrate fluctuations in accumulation that coincide with lake evolution and post-glacial climate change. Ten of our sediment cores yielded sediments as old as c. 9000cal BP (BP=years before AD 1950). From between c. 9000cal BP and c. 6000cal BP, sediment accumulation was relatively rapid (DT of 20-60yr/cm). Accumulation slowed between c. 5500 and c. 4000cal BP as vegetation expanded northward in response to warming. A short period of rapid accumulation occurred near 1200cal BP at three lakes. Our research will help inform priors in Bayesian age modeling. Article in Journal/Newspaper Arctic Climate change Northwest Territories Subarctic Tundra White Rose Research Online (Universities of Leeds, Sheffield & York) Arctic Northwest Territories Canada Quaternary Geochronology 27 131 144 |
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Open Polar |
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White Rose Research Online (Universities of Leeds, Sheffield & York) |
op_collection_id |
ftleedsuniv |
language |
English |
description |
Age-depth modeling using Bayesian statistics requires well-informed prior information about the behavior of sediment accumulation. Here we present average sediment accumulation rates (represented as deposition times, DT, in yr/cm) for lakes in an Arctic setting, and we examine the variability across space (intra- and inter-lake) and time (late Holocene). The dataset includes over 100 radiocarbon dates, primarily on bulk sediment, from 22 sediment cores obtained from 18 lakes spanning the boreal to tundra ecotone gradients in subarctic Canada. There are four to twenty-five radiocarbon dates per core, depending on the length and character of the sediment records. Deposition times were calculated at 100-year intervals from age-depth models constructed using the 'classical' age-depth modeling software Clam. Lakes in boreal settings have the most rapid accumulation (mean DT 20±10 yr/cm), whereas lakes in tundra settings accumulate at moderate (mean DT 70±10 yr/cm) to very slow rates, (>100yr/cm). Many of the age-depth models demonstrate fluctuations in accumulation that coincide with lake evolution and post-glacial climate change. Ten of our sediment cores yielded sediments as old as c. 9000cal BP (BP=years before AD 1950). From between c. 9000cal BP and c. 6000cal BP, sediment accumulation was relatively rapid (DT of 20-60yr/cm). Accumulation slowed between c. 5500 and c. 4000cal BP as vegetation expanded northward in response to warming. A short period of rapid accumulation occurred near 1200cal BP at three lakes. Our research will help inform priors in Bayesian age modeling. |
format |
Article in Journal/Newspaper |
author |
Crann, CA Patterson, RT Macumber, AL Galloway, JM Roe, HM Blaauw, M Swindles, GT Falck, H |
spellingShingle |
Crann, CA Patterson, RT Macumber, AL Galloway, JM Roe, HM Blaauw, M Swindles, GT Falck, H Sediment accumulation rates in subarctic lakes: Insights into age-depth modeling from 22 dated lake records from the Northwest Territories, Canada |
author_facet |
Crann, CA Patterson, RT Macumber, AL Galloway, JM Roe, HM Blaauw, M Swindles, GT Falck, H |
author_sort |
Crann, CA |
title |
Sediment accumulation rates in subarctic lakes: Insights into age-depth modeling from 22 dated lake records from the Northwest Territories, Canada |
title_short |
Sediment accumulation rates in subarctic lakes: Insights into age-depth modeling from 22 dated lake records from the Northwest Territories, Canada |
title_full |
Sediment accumulation rates in subarctic lakes: Insights into age-depth modeling from 22 dated lake records from the Northwest Territories, Canada |
title_fullStr |
Sediment accumulation rates in subarctic lakes: Insights into age-depth modeling from 22 dated lake records from the Northwest Territories, Canada |
title_full_unstemmed |
Sediment accumulation rates in subarctic lakes: Insights into age-depth modeling from 22 dated lake records from the Northwest Territories, Canada |
title_sort |
sediment accumulation rates in subarctic lakes: insights into age-depth modeling from 22 dated lake records from the northwest territories, canada |
publisher |
Elsevier |
publishDate |
2015 |
url |
https://eprints.whiterose.ac.uk/84364/ https://eprints.whiterose.ac.uk/84364/1/Crann%202015%20Manu%20.pdf https://doi.org/10.1016/j.quageo.2015.02.001 |
geographic |
Arctic Northwest Territories Canada |
geographic_facet |
Arctic Northwest Territories Canada |
genre |
Arctic Climate change Northwest Territories Subarctic Tundra |
genre_facet |
Arctic Climate change Northwest Territories Subarctic Tundra |
op_relation |
https://eprints.whiterose.ac.uk/84364/1/Crann%202015%20Manu%20.pdf Crann, CA, Patterson, RT, Macumber, AL et al. (5 more authors) (2015) Sediment accumulation rates in subarctic lakes: Insights into age-depth modeling from 22 dated lake records from the Northwest Territories, Canada. Quaternary Geochronology, 27. 131 - 144. ISSN 1871-1014 |
op_doi |
https://doi.org/10.1016/j.quageo.2015.02.001 |
container_title |
Quaternary Geochronology |
container_volume |
27 |
container_start_page |
131 |
op_container_end_page |
144 |
_version_ |
1766341663283740672 |