Tracing winter temperatures over the last two millennia using a north-east Atlantic coastal record
We present 2500 years of reconstructed bottom water temperatures (BWT) using a fjord sediment archive from the north-east Atlantic region. The BWT represent winter conditions due to the fjord hydrography and the associated timing and frequency of bottom water renewals. The study is based on a ca. 8m...
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Copernicus GmbH
2018
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Online Access: | https://lup.lub.lu.se/record/3bc87076-6e8f-49c1-a226-ea68584b3c2e https://doi.org/10.5194/cp-14-1097-2018 |
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ftulundlup:oai:lup.lub.lu.se:3bc87076-6e8f-49c1-a226-ea68584b3c2e 2023-05-15T17:38:18+02:00 Tracing winter temperatures over the last two millennia using a north-east Atlantic coastal record Asteman, Irina Polovodova Filipsson, Helena L. Nordberg, Kjell 2018-07-25 https://lup.lub.lu.se/record/3bc87076-6e8f-49c1-a226-ea68584b3c2e https://doi.org/10.5194/cp-14-1097-2018 eng eng Copernicus GmbH https://lup.lub.lu.se/record/3bc87076-6e8f-49c1-a226-ea68584b3c2e http://dx.doi.org/10.5194/cp-14-1097-2018 scopus:85050823415 Climate of the Past; 14(7), pp 1097-1118 (2018) ISSN: 1814-9324 Climate Research contributiontojournal/article info:eu-repo/semantics/article text 2018 ftulundlup https://doi.org/10.5194/cp-14-1097-2018 2023-02-01T23:36:48Z We present 2500 years of reconstructed bottom water temperatures (BWT) using a fjord sediment archive from the north-east Atlantic region. The BWT represent winter conditions due to the fjord hydrography and the associated timing and frequency of bottom water renewals. The study is based on a ca. 8m long sediment core from Gullmar Fjord (Sweden), which was dated by 210Pb and AMS 14C and analysed for stable oxygen isotopes (δ18O) measured on shallow infaunal benthic foraminiferal species Cassidulina laevigata d'Orbigny 1826. The BWT, calculated using the palaeotemperature equation from McCorkle et al. (1997), range between 2.7 and 7.8°C and are within the annual temperature variability that has been instrumentally recorded in the deep fjord basin since the 1890s. The record demonstrates a warming during the Roman Warm Period ( ∼ 350BCE-450CE), variable BWT during the Dark Ages ( ∼ 450-850CE), positive BWT anomalies during the Viking Age/Medieval Climate Anomaly ( ∼ 850-1350CE) and a long-term cooling with distinct multidecadal variability during the Little Ice Age ( ∼ 1350-1850CE). The fjord BWT record also picks up the contemporary warming of the 20th century (presented here until 1996), which does not stand out in the 2500-year perspective and is of the same magnitude as the Roman Warm Period and the Medieval Climate Anomaly. Article in Journal/Newspaper North East Atlantic Lund University Publications (LUP) Climate of the Past 14 7 1097 1118 |
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Open Polar |
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Lund University Publications (LUP) |
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ftulundlup |
language |
English |
topic |
Climate Research |
spellingShingle |
Climate Research Asteman, Irina Polovodova Filipsson, Helena L. Nordberg, Kjell Tracing winter temperatures over the last two millennia using a north-east Atlantic coastal record |
topic_facet |
Climate Research |
description |
We present 2500 years of reconstructed bottom water temperatures (BWT) using a fjord sediment archive from the north-east Atlantic region. The BWT represent winter conditions due to the fjord hydrography and the associated timing and frequency of bottom water renewals. The study is based on a ca. 8m long sediment core from Gullmar Fjord (Sweden), which was dated by 210Pb and AMS 14C and analysed for stable oxygen isotopes (δ18O) measured on shallow infaunal benthic foraminiferal species Cassidulina laevigata d'Orbigny 1826. The BWT, calculated using the palaeotemperature equation from McCorkle et al. (1997), range between 2.7 and 7.8°C and are within the annual temperature variability that has been instrumentally recorded in the deep fjord basin since the 1890s. The record demonstrates a warming during the Roman Warm Period ( ∼ 350BCE-450CE), variable BWT during the Dark Ages ( ∼ 450-850CE), positive BWT anomalies during the Viking Age/Medieval Climate Anomaly ( ∼ 850-1350CE) and a long-term cooling with distinct multidecadal variability during the Little Ice Age ( ∼ 1350-1850CE). The fjord BWT record also picks up the contemporary warming of the 20th century (presented here until 1996), which does not stand out in the 2500-year perspective and is of the same magnitude as the Roman Warm Period and the Medieval Climate Anomaly. |
format |
Article in Journal/Newspaper |
author |
Asteman, Irina Polovodova Filipsson, Helena L. Nordberg, Kjell |
author_facet |
Asteman, Irina Polovodova Filipsson, Helena L. Nordberg, Kjell |
author_sort |
Asteman, Irina Polovodova |
title |
Tracing winter temperatures over the last two millennia using a north-east Atlantic coastal record |
title_short |
Tracing winter temperatures over the last two millennia using a north-east Atlantic coastal record |
title_full |
Tracing winter temperatures over the last two millennia using a north-east Atlantic coastal record |
title_fullStr |
Tracing winter temperatures over the last two millennia using a north-east Atlantic coastal record |
title_full_unstemmed |
Tracing winter temperatures over the last two millennia using a north-east Atlantic coastal record |
title_sort |
tracing winter temperatures over the last two millennia using a north-east atlantic coastal record |
publisher |
Copernicus GmbH |
publishDate |
2018 |
url |
https://lup.lub.lu.se/record/3bc87076-6e8f-49c1-a226-ea68584b3c2e https://doi.org/10.5194/cp-14-1097-2018 |
genre |
North East Atlantic |
genre_facet |
North East Atlantic |
op_source |
Climate of the Past; 14(7), pp 1097-1118 (2018) ISSN: 1814-9324 |
op_relation |
https://lup.lub.lu.se/record/3bc87076-6e8f-49c1-a226-ea68584b3c2e http://dx.doi.org/10.5194/cp-14-1097-2018 scopus:85050823415 |
op_doi |
https://doi.org/10.5194/cp-14-1097-2018 |
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Climate of the Past |
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14 |
container_issue |
7 |
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1097 |
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1118 |
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1766138691909058560 |