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. 8...
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Online Access: | https://doi.org/10.5194/cp-14-1097-2018 https://www.clim-past.net/14/1097/2018/cp-14-1097-2018.pdf https://doaj.org/article/9d6768c9ed884ead8494a4b8c058913e |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:9d6768c9ed884ead8494a4b8c058913e 2023-05-15T17:38:19+02:00 Tracing winter temperatures over the last two millennia using a north-east Atlantic coastal record I. Polovodova Asteman H. L. Filipsson K. Nordberg 2018-07-01 https://doi.org/10.5194/cp-14-1097-2018 https://www.clim-past.net/14/1097/2018/cp-14-1097-2018.pdf https://doaj.org/article/9d6768c9ed884ead8494a4b8c058913e en eng Copernicus Publications doi:10.5194/cp-14-1097-2018 1814-9324 1814-9332 https://www.clim-past.net/14/1097/2018/cp-14-1097-2018.pdf https://doaj.org/article/9d6768c9ed884ead8494a4b8c058913e undefined Climate of the Past, Vol 14, Pp 1097-1118 (2018) envir geo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2018 fttriple https://doi.org/10.5194/cp-14-1097-2018 2023-01-22T18:03:51Z 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. 8 m 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 ( ∼ 350 BCE–450 CE), variable BWT during the Dark Ages ( ∼ 450–850 CE), positive BWT anomalies during the Viking Age/Medieval Climate Anomaly ( ∼ 850–1350 CE) and a long-term cooling with distinct multidecadal variability during the Little Ice Age ( ∼ 1350–1850 CE). 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 Unknown Climate of the Past 14 7 1097 1118 |
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envir geo I. Polovodova Asteman H. L. Filipsson K. Nordberg Tracing winter temperatures over the last two millennia using a north-east Atlantic coastal record |
topic_facet |
envir geo |
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. 8 m 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 ( ∼ 350 BCE–450 CE), variable BWT during the Dark Ages ( ∼ 450–850 CE), positive BWT anomalies during the Viking Age/Medieval Climate Anomaly ( ∼ 850–1350 CE) and a long-term cooling with distinct multidecadal variability during the Little Ice Age ( ∼ 1350–1850 CE). 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 |
I. Polovodova Asteman H. L. Filipsson K. Nordberg |
author_facet |
I. Polovodova Asteman H. L. Filipsson K. Nordberg |
author_sort |
I. Polovodova Asteman |
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 Publications |
publishDate |
2018 |
url |
https://doi.org/10.5194/cp-14-1097-2018 https://www.clim-past.net/14/1097/2018/cp-14-1097-2018.pdf https://doaj.org/article/9d6768c9ed884ead8494a4b8c058913e |
genre |
North East Atlantic |
genre_facet |
North East Atlantic |
op_source |
Climate of the Past, Vol 14, Pp 1097-1118 (2018) |
op_relation |
doi:10.5194/cp-14-1097-2018 1814-9324 1814-9332 https://www.clim-past.net/14/1097/2018/cp-14-1097-2018.pdf https://doaj.org/article/9d6768c9ed884ead8494a4b8c058913e |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/cp-14-1097-2018 |
container_title |
Climate of the Past |
container_volume |
14 |
container_issue |
7 |
container_start_page |
1097 |
op_container_end_page |
1118 |
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1766138707959611392 |