Modeling the distribution and seasonality of Neogloboquadrina pachyderma in the North Atlantic Ocean during Heinrich Stadial 1
Fossil shells of planktonic foraminifera serve as the prime source of information on past changes in surface ocean conditions. Because the population size of planktonic foraminifera species changes throughout the year, the signal preserved in fossil shells is biased toward the conditions when specie...
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Language: | English |
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AGU (American Geophysical Union)
2016
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Online Access: | https://oceanrep.geomar.de/id/eprint/49671/ https://oceanrep.geomar.de/id/eprint/49671/1/2015PA002819.pdf https://doi.org/10.1002/2015PA002819 |
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ftoceanrep:oai:oceanrep.geomar.de:49671 2023-05-15T17:14:54+02:00 Modeling the distribution and seasonality of Neogloboquadrina pachyderma in the North Atlantic Ocean during Heinrich Stadial 1 Kretschmer, Kerstin Kucera, Michal Schulz, Michael 2016-06-21 text https://oceanrep.geomar.de/id/eprint/49671/ https://oceanrep.geomar.de/id/eprint/49671/1/2015PA002819.pdf https://doi.org/10.1002/2015PA002819 en eng AGU (American Geophysical Union) https://oceanrep.geomar.de/id/eprint/49671/1/2015PA002819.pdf Kretschmer, K., Kucera, M. and Schulz, M. (2016) Modeling the distribution and seasonality of Neogloboquadrina pachyderma in the North Atlantic Ocean during Heinrich Stadial 1. Paleoceanography, 31 (7). pp. 986-1010. DOI 10.1002/2015PA002819 <https://doi.org/10.1002/2015PA002819>. doi:10.1002/2015PA002819 info:eu-repo/semantics/restrictedAccess Article PeerReviewed 2016 ftoceanrep https://doi.org/10.1002/2015PA002819 2023-04-07T15:50:27Z Fossil shells of planktonic foraminifera serve as the prime source of information on past changes in surface ocean conditions. Because the population size of planktonic foraminifera species changes throughout the year, the signal preserved in fossil shells is biased toward the conditions when species production was at its maximum. The amplitude of the potential seasonal bias is a function of the magnitude of the seasonal cycle in production. Here we use a planktonic foraminifera model coupled to an ecosystem model to investigate to what degree seasonal variations in production of the species Neogloboquadrina pachyderma may affect paleoceanographic reconstructions during Heinrich Stadial 1 (∼ 18–15 cal ka B.P.) in the North Atlantic Ocean. The model implies that during Heinrich Stadial 1 the maximum seasonal production occurred later in the year compared to the Last Glacial Maximum (∼ 21–19 cal ka B.P.) and the preindustrial era north of 30°N. A diagnosis of the model output indicates that this change reflects the sensitivity of the species to the seasonal cycle of sea ice cover and food supply, which collectively lead to shifts in the modeled maximum production from the Last Glacial Maximum to Heinrich Stadial 1 by up to 6 months. Assuming equilibrium oxygen isotopic incorporation in the shells of N. pachyderma, the modeled changes in seasonality would result in an underestimation of the actual magnitude of the meltwater isotopic signal recorded by fossil assemblages of N. pachyderma wherever calcification is likely to take place. Article in Journal/Newspaper Neogloboquadrina pachyderma North Atlantic Planktonic foraminifera Sea ice OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Paleoceanography 31 7 986 1010 |
institution |
Open Polar |
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OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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ftoceanrep |
language |
English |
description |
Fossil shells of planktonic foraminifera serve as the prime source of information on past changes in surface ocean conditions. Because the population size of planktonic foraminifera species changes throughout the year, the signal preserved in fossil shells is biased toward the conditions when species production was at its maximum. The amplitude of the potential seasonal bias is a function of the magnitude of the seasonal cycle in production. Here we use a planktonic foraminifera model coupled to an ecosystem model to investigate to what degree seasonal variations in production of the species Neogloboquadrina pachyderma may affect paleoceanographic reconstructions during Heinrich Stadial 1 (∼ 18–15 cal ka B.P.) in the North Atlantic Ocean. The model implies that during Heinrich Stadial 1 the maximum seasonal production occurred later in the year compared to the Last Glacial Maximum (∼ 21–19 cal ka B.P.) and the preindustrial era north of 30°N. A diagnosis of the model output indicates that this change reflects the sensitivity of the species to the seasonal cycle of sea ice cover and food supply, which collectively lead to shifts in the modeled maximum production from the Last Glacial Maximum to Heinrich Stadial 1 by up to 6 months. Assuming equilibrium oxygen isotopic incorporation in the shells of N. pachyderma, the modeled changes in seasonality would result in an underestimation of the actual magnitude of the meltwater isotopic signal recorded by fossil assemblages of N. pachyderma wherever calcification is likely to take place. |
format |
Article in Journal/Newspaper |
author |
Kretschmer, Kerstin Kucera, Michal Schulz, Michael |
spellingShingle |
Kretschmer, Kerstin Kucera, Michal Schulz, Michael Modeling the distribution and seasonality of Neogloboquadrina pachyderma in the North Atlantic Ocean during Heinrich Stadial 1 |
author_facet |
Kretschmer, Kerstin Kucera, Michal Schulz, Michael |
author_sort |
Kretschmer, Kerstin |
title |
Modeling the distribution and seasonality of Neogloboquadrina pachyderma in the North Atlantic Ocean during Heinrich Stadial 1 |
title_short |
Modeling the distribution and seasonality of Neogloboquadrina pachyderma in the North Atlantic Ocean during Heinrich Stadial 1 |
title_full |
Modeling the distribution and seasonality of Neogloboquadrina pachyderma in the North Atlantic Ocean during Heinrich Stadial 1 |
title_fullStr |
Modeling the distribution and seasonality of Neogloboquadrina pachyderma in the North Atlantic Ocean during Heinrich Stadial 1 |
title_full_unstemmed |
Modeling the distribution and seasonality of Neogloboquadrina pachyderma in the North Atlantic Ocean during Heinrich Stadial 1 |
title_sort |
modeling the distribution and seasonality of neogloboquadrina pachyderma in the north atlantic ocean during heinrich stadial 1 |
publisher |
AGU (American Geophysical Union) |
publishDate |
2016 |
url |
https://oceanrep.geomar.de/id/eprint/49671/ https://oceanrep.geomar.de/id/eprint/49671/1/2015PA002819.pdf https://doi.org/10.1002/2015PA002819 |
genre |
Neogloboquadrina pachyderma North Atlantic Planktonic foraminifera Sea ice |
genre_facet |
Neogloboquadrina pachyderma North Atlantic Planktonic foraminifera Sea ice |
op_relation |
https://oceanrep.geomar.de/id/eprint/49671/1/2015PA002819.pdf Kretschmer, K., Kucera, M. and Schulz, M. (2016) Modeling the distribution and seasonality of Neogloboquadrina pachyderma in the North Atlantic Ocean during Heinrich Stadial 1. Paleoceanography, 31 (7). pp. 986-1010. DOI 10.1002/2015PA002819 <https://doi.org/10.1002/2015PA002819>. doi:10.1002/2015PA002819 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1002/2015PA002819 |
container_title |
Paleoceanography |
container_volume |
31 |
container_issue |
7 |
container_start_page |
986 |
op_container_end_page |
1010 |
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1766072833329332224 |