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...
Published in: | Quaternary Geochronology |
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Format: | Article in Journal/Newspaper |
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2015
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Online Access: | https://pure.qub.ac.uk/en/publications/11ce8d6c-fdd9-4b43-bc65-2b04b2cd013d https://doi.org/10.1016/j.quageo.2015.02.001 https://pureadmin.qub.ac.uk/ws/files/13852836/Crann.2015.Manu.10.1016.jquageo.2015.02.001.pdf http://www.scopus.com/inward/record.url?eid=2-s2.0-84923628221&partnerID=MN8TOARS |
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ftqueensubelpubl:oai:pure.qub.ac.uk/portal:publications/11ce8d6c-fdd9-4b43-bc65-2b04b2cd013d 2024-05-12T08:00:25+00:00 Sediment accumulation rates in subarctic lakes: insights into age-depth modeling from 22 dated lake records from the Northwest Territories, Canada. Crann, C.A. Patterson, R.T. Macumber, A.L. Galloway, J.M. Roe, H.M. Blaauw, M. Swindles, G.T. Falck, H. 2015-04-01 application/pdf https://pure.qub.ac.uk/en/publications/11ce8d6c-fdd9-4b43-bc65-2b04b2cd013d https://doi.org/10.1016/j.quageo.2015.02.001 https://pureadmin.qub.ac.uk/ws/files/13852836/Crann.2015.Manu.10.1016.jquageo.2015.02.001.pdf http://www.scopus.com/inward/record.url?eid=2-s2.0-84923628221&partnerID=MN8TOARS eng eng https://pure.qub.ac.uk/en/publications/11ce8d6c-fdd9-4b43-bc65-2b04b2cd013d info:eu-repo/semantics/openAccess Crann , C A , Patterson , R T , Macumber , A L , Galloway , J M , Roe , H M , Blaauw , M , Swindles , G T & Falck , H 2015 , ' Sediment accumulation rates in subarctic lakes: insights into age-depth modeling from 22 dated lake records from the Northwest Territories, Canada. ' , Quaternary Geochronology , vol. 27 , pp. 131-144 . https://doi.org/10.1016/j.quageo.2015.02.001 /dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action article 2015 ftqueensubelpubl https://doi.org/10.1016/j.quageo.2015.02.001 2024-04-17T23:49:24Z 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 years), whereas lakes in tundra settings accumulate at moderate (mean DT 70 ± 10 years) to very slow rates, (>100 yr/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. 9,000 cal BP (BP = years before AD 1950). From between c. 9,000 cal BP and c. 6,000 cal BP, sediment accumulation was relatively rapid (DT of 20 to 60 yr/cm). Accumulation slowed between c. 5,500 and c. 4,000 cal BP as vegetation expanded northward in response to warming. A short period of rapid accumulation occurred near 1,200 cal 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 Queen's University Belfast Research Portal Arctic Northwest Territories Canada Quaternary Geochronology 27 131 144 |
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Open Polar |
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Queen's University Belfast Research Portal |
op_collection_id |
ftqueensubelpubl |
language |
English |
topic |
/dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action |
spellingShingle |
/dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action Crann, C.A. Patterson, R.T. Macumber, A.L. Galloway, J.M. Roe, H.M. Blaauw, M. Swindles, G.T. Falck, H. Sediment accumulation rates in subarctic lakes: insights into age-depth modeling from 22 dated lake records from the Northwest Territories, Canada. |
topic_facet |
/dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action |
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 years), whereas lakes in tundra settings accumulate at moderate (mean DT 70 ± 10 years) to very slow rates, (>100 yr/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. 9,000 cal BP (BP = years before AD 1950). From between c. 9,000 cal BP and c. 6,000 cal BP, sediment accumulation was relatively rapid (DT of 20 to 60 yr/cm). Accumulation slowed between c. 5,500 and c. 4,000 cal BP as vegetation expanded northward in response to warming. A short period of rapid accumulation occurred near 1,200 cal BP at three lakes. Our research will help inform priors in Bayesian age modeling. |
format |
Article in Journal/Newspaper |
author |
Crann, C.A. Patterson, R.T. Macumber, A.L. Galloway, J.M. Roe, H.M. Blaauw, M. Swindles, G.T. Falck, H. |
author_facet |
Crann, C.A. Patterson, R.T. Macumber, A.L. Galloway, J.M. Roe, H.M. Blaauw, M. Swindles, G.T. Falck, H. |
author_sort |
Crann, C.A. |
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. |
publishDate |
2015 |
url |
https://pure.qub.ac.uk/en/publications/11ce8d6c-fdd9-4b43-bc65-2b04b2cd013d https://doi.org/10.1016/j.quageo.2015.02.001 https://pureadmin.qub.ac.uk/ws/files/13852836/Crann.2015.Manu.10.1016.jquageo.2015.02.001.pdf http://www.scopus.com/inward/record.url?eid=2-s2.0-84923628221&partnerID=MN8TOARS |
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_source |
Crann , C A , Patterson , R T , Macumber , A L , Galloway , J M , Roe , H M , Blaauw , M , Swindles , G T & Falck , H 2015 , ' Sediment accumulation rates in subarctic lakes: insights into age-depth modeling from 22 dated lake records from the Northwest Territories, Canada. ' , Quaternary Geochronology , vol. 27 , pp. 131-144 . https://doi.org/10.1016/j.quageo.2015.02.001 |
op_relation |
https://pure.qub.ac.uk/en/publications/11ce8d6c-fdd9-4b43-bc65-2b04b2cd013d |
op_rights |
info:eu-repo/semantics/openAccess |
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 |
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1798842305068662784 |