Evidence for a warmer period during the 12th and 13th centuries AD from chironomid assemblages in Southampton Island, Nunavut, Canada
Abstract This study presents the Late-Holocene evolution of a northern Southampton Island (Nunavut, Canada) lake, using fossil chironomids supported by sedimentological evidences (XRF, grain size and CNS). All proxies revealed a relatively stable environment during the last millennium with short-liv...
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crcambridgeupr:10.1016/j.yqres.2009.03.001 2024-06-09T07:46:02+00:00 Evidence for a warmer period during the 12th and 13th centuries AD from chironomid assemblages in Southampton Island, Nunavut, Canada Rolland, Nicolas Larocque, Isabelle Francus, Pierre Pienitz, Reinhard Laperrière, Laurence 2009 http://dx.doi.org/10.1016/j.yqres.2009.03.001 http://api.elsevier.com/content/article/PII:S0033589409000313?httpAccept=text/xml http://api.elsevier.com/content/article/PII:S0033589409000313?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S003358940000627X en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Quaternary Research volume 72, issue 1, page 27-37 ISSN 0033-5894 1096-0287 journal-article 2009 crcambridgeupr https://doi.org/10.1016/j.yqres.2009.03.001 2024-05-15T13:02:23Z Abstract This study presents the Late-Holocene evolution of a northern Southampton Island (Nunavut, Canada) lake, using fossil chironomids supported by sedimentological evidences (XRF, grain size and CNS). All proxies revealed a relatively stable environment during the last millennium with short-lived events driving changes in the entire lake ecosystem. The chironomid-based paleotemperatures revealed variations of significant amplitude coincident with changes in the sediment density and chemical composition of the core. Higher temperature intervals were generally correlated to lower sediment density with higher chironomid concentration and diversity. Higher temperatures were recorded from cal yr AD 1160 to AD 1360, which may correspond to the Medieval Warm Period. Between cal yr AD 1360 and AD 1700, lower temperatures were probably related to a Little Ice Age event. This study presents new information on the timing of known climatic events which will refine our knowledge of the paleoclimate and climatic models of the Foxe Basin region. It also provides a new framework for the evolution of such freshwater ecosystems under the “Anthropocene” and underlines the importance of including sedimentological proxies when interpreting chironomid remains as this combined approach provides an extended overview of the past hydrological and geochemical changes and their impacts on lake biota. Article in Journal/Newspaper Foxe Basin Nunavut Southampton Island Cambridge University Press Canada Foxe Basin ENVELOPE(-77.918,-77.918,65.931,65.931) Nunavut Southampton Island ENVELOPE(-84.501,-84.501,64.463,64.463) Quaternary Research 72 1 27 37 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
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English |
description |
Abstract This study presents the Late-Holocene evolution of a northern Southampton Island (Nunavut, Canada) lake, using fossil chironomids supported by sedimentological evidences (XRF, grain size and CNS). All proxies revealed a relatively stable environment during the last millennium with short-lived events driving changes in the entire lake ecosystem. The chironomid-based paleotemperatures revealed variations of significant amplitude coincident with changes in the sediment density and chemical composition of the core. Higher temperature intervals were generally correlated to lower sediment density with higher chironomid concentration and diversity. Higher temperatures were recorded from cal yr AD 1160 to AD 1360, which may correspond to the Medieval Warm Period. Between cal yr AD 1360 and AD 1700, lower temperatures were probably related to a Little Ice Age event. This study presents new information on the timing of known climatic events which will refine our knowledge of the paleoclimate and climatic models of the Foxe Basin region. It also provides a new framework for the evolution of such freshwater ecosystems under the “Anthropocene” and underlines the importance of including sedimentological proxies when interpreting chironomid remains as this combined approach provides an extended overview of the past hydrological and geochemical changes and their impacts on lake biota. |
format |
Article in Journal/Newspaper |
author |
Rolland, Nicolas Larocque, Isabelle Francus, Pierre Pienitz, Reinhard Laperrière, Laurence |
spellingShingle |
Rolland, Nicolas Larocque, Isabelle Francus, Pierre Pienitz, Reinhard Laperrière, Laurence Evidence for a warmer period during the 12th and 13th centuries AD from chironomid assemblages in Southampton Island, Nunavut, Canada |
author_facet |
Rolland, Nicolas Larocque, Isabelle Francus, Pierre Pienitz, Reinhard Laperrière, Laurence |
author_sort |
Rolland, Nicolas |
title |
Evidence for a warmer period during the 12th and 13th centuries AD from chironomid assemblages in Southampton Island, Nunavut, Canada |
title_short |
Evidence for a warmer period during the 12th and 13th centuries AD from chironomid assemblages in Southampton Island, Nunavut, Canada |
title_full |
Evidence for a warmer period during the 12th and 13th centuries AD from chironomid assemblages in Southampton Island, Nunavut, Canada |
title_fullStr |
Evidence for a warmer period during the 12th and 13th centuries AD from chironomid assemblages in Southampton Island, Nunavut, Canada |
title_full_unstemmed |
Evidence for a warmer period during the 12th and 13th centuries AD from chironomid assemblages in Southampton Island, Nunavut, Canada |
title_sort |
evidence for a warmer period during the 12th and 13th centuries ad from chironomid assemblages in southampton island, nunavut, canada |
publisher |
Cambridge University Press (CUP) |
publishDate |
2009 |
url |
http://dx.doi.org/10.1016/j.yqres.2009.03.001 http://api.elsevier.com/content/article/PII:S0033589409000313?httpAccept=text/xml http://api.elsevier.com/content/article/PII:S0033589409000313?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S003358940000627X |
long_lat |
ENVELOPE(-77.918,-77.918,65.931,65.931) ENVELOPE(-84.501,-84.501,64.463,64.463) |
geographic |
Canada Foxe Basin Nunavut Southampton Island |
geographic_facet |
Canada Foxe Basin Nunavut Southampton Island |
genre |
Foxe Basin Nunavut Southampton Island |
genre_facet |
Foxe Basin Nunavut Southampton Island |
op_source |
Quaternary Research volume 72, issue 1, page 27-37 ISSN 0033-5894 1096-0287 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1016/j.yqres.2009.03.001 |
container_title |
Quaternary Research |
container_volume |
72 |
container_issue |
1 |
container_start_page |
27 |
op_container_end_page |
37 |
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1801375727514288128 |