Variability in temperature and geometry of the Norwegian Current over the past 600 yr; stable isotope and grain size evidence from the Norwegian margin
Abstract Core P1‐003MC was retrieved from 851 m water depth on the southern Norwegian continental margin, close to the boundary between the Norwegian Current (NC) and the underlying cold Norwegian Sea Deep Water. The core chronology was established by using 210 Pb measurements and 14 C dates, sugges...
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crwiley:10.1002/jqs.790 2024-10-13T14:09:02+00:00 Variability in temperature and geometry of the Norwegian Current over the past 600 yr; stable isotope and grain size evidence from the Norwegian margin Berstad, Ida Malene Sejrup, Hans Petter Klitgaard‐Kristensen, Dorthe Haflidason, Haflidi 2003 http://dx.doi.org/10.1002/jqs.790 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjqs.790 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.790 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Quaternary Science volume 18, issue 7, page 591-602 ISSN 0267-8179 1099-1417 journal-article 2003 crwiley https://doi.org/10.1002/jqs.790 2024-09-23T04:36:35Z Abstract Core P1‐003MC was retrieved from 851 m water depth on the southern Norwegian continental margin, close to the boundary between the Norwegian Current (NC) and the underlying cold Norwegian Sea Deep Water. The core chronology was established by using 210 Pb measurements and 14 C dates, suggesting a sampling resolution of between 2 and 9 yr. Sea‐surface temperature (SST) variations in the NC are reconstructed from stable oxygen isotope measurements in two planktonic Foraminifera species, Neogloboquadrina pachyderma (d.) and Globigerina bulloides . The high temporal resolution of the SST proxy records allows direct comparison with instrumental ocean temperature measurements from Ocean Weather Ship (OWS) Mike in the Norwegian Sea and an air temperature record from the coastal island Ona, western Norway. The comparison of the instrumental and the proxy SST data suggests that N. pachyderma (d.) calcify during summer, whereas G. bulloides calcify during spring. The δ 18 O records of both species suggest that the past 70 yr have been the warmest throughout the past 600 yr. The spring and summer proxy temperature data suggest differences in the duration of the cold period of the Little Ice Age. The spring temperature was 1–3°C colder throughout most of the period between ca. AD 1400 and 1700, and the summer temperature was 1–2°C colder throughout most of the period between ca. AD 1400 and 1920. Fluctuations in the depth of the lower boundary of the NC have been investigated by examining grain size data and benthic foraminiferal assemblages. The data show that the transition depth of the lower boundary of the NC was deeper between ca. AD 1400 and 1650 than after ca. AD 1750 until present. Copyright © 2003 John Wiley & Sons, Ltd. Article in Journal/Newspaper Neogloboquadrina pachyderma Norwegian Sea Planktonic foraminifera Wiley Online Library Norway Norwegian Sea Journal of Quaternary Science 18 7 591 602 |
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crwiley |
language |
English |
description |
Abstract Core P1‐003MC was retrieved from 851 m water depth on the southern Norwegian continental margin, close to the boundary between the Norwegian Current (NC) and the underlying cold Norwegian Sea Deep Water. The core chronology was established by using 210 Pb measurements and 14 C dates, suggesting a sampling resolution of between 2 and 9 yr. Sea‐surface temperature (SST) variations in the NC are reconstructed from stable oxygen isotope measurements in two planktonic Foraminifera species, Neogloboquadrina pachyderma (d.) and Globigerina bulloides . The high temporal resolution of the SST proxy records allows direct comparison with instrumental ocean temperature measurements from Ocean Weather Ship (OWS) Mike in the Norwegian Sea and an air temperature record from the coastal island Ona, western Norway. The comparison of the instrumental and the proxy SST data suggests that N. pachyderma (d.) calcify during summer, whereas G. bulloides calcify during spring. The δ 18 O records of both species suggest that the past 70 yr have been the warmest throughout the past 600 yr. The spring and summer proxy temperature data suggest differences in the duration of the cold period of the Little Ice Age. The spring temperature was 1–3°C colder throughout most of the period between ca. AD 1400 and 1700, and the summer temperature was 1–2°C colder throughout most of the period between ca. AD 1400 and 1920. Fluctuations in the depth of the lower boundary of the NC have been investigated by examining grain size data and benthic foraminiferal assemblages. The data show that the transition depth of the lower boundary of the NC was deeper between ca. AD 1400 and 1650 than after ca. AD 1750 until present. Copyright © 2003 John Wiley & Sons, Ltd. |
format |
Article in Journal/Newspaper |
author |
Berstad, Ida Malene Sejrup, Hans Petter Klitgaard‐Kristensen, Dorthe Haflidason, Haflidi |
spellingShingle |
Berstad, Ida Malene Sejrup, Hans Petter Klitgaard‐Kristensen, Dorthe Haflidason, Haflidi Variability in temperature and geometry of the Norwegian Current over the past 600 yr; stable isotope and grain size evidence from the Norwegian margin |
author_facet |
Berstad, Ida Malene Sejrup, Hans Petter Klitgaard‐Kristensen, Dorthe Haflidason, Haflidi |
author_sort |
Berstad, Ida Malene |
title |
Variability in temperature and geometry of the Norwegian Current over the past 600 yr; stable isotope and grain size evidence from the Norwegian margin |
title_short |
Variability in temperature and geometry of the Norwegian Current over the past 600 yr; stable isotope and grain size evidence from the Norwegian margin |
title_full |
Variability in temperature and geometry of the Norwegian Current over the past 600 yr; stable isotope and grain size evidence from the Norwegian margin |
title_fullStr |
Variability in temperature and geometry of the Norwegian Current over the past 600 yr; stable isotope and grain size evidence from the Norwegian margin |
title_full_unstemmed |
Variability in temperature and geometry of the Norwegian Current over the past 600 yr; stable isotope and grain size evidence from the Norwegian margin |
title_sort |
variability in temperature and geometry of the norwegian current over the past 600 yr; stable isotope and grain size evidence from the norwegian margin |
publisher |
Wiley |
publishDate |
2003 |
url |
http://dx.doi.org/10.1002/jqs.790 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjqs.790 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.790 |
geographic |
Norway Norwegian Sea |
geographic_facet |
Norway Norwegian Sea |
genre |
Neogloboquadrina pachyderma Norwegian Sea Planktonic foraminifera |
genre_facet |
Neogloboquadrina pachyderma Norwegian Sea Planktonic foraminifera |
op_source |
Journal of Quaternary Science volume 18, issue 7, page 591-602 ISSN 0267-8179 1099-1417 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/jqs.790 |
container_title |
Journal of Quaternary Science |
container_volume |
18 |
container_issue |
7 |
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591 |
op_container_end_page |
602 |
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1812815863700520960 |