Oxygen isotope composition of living Neogloboquadrina pachyderma (sin.) in the Arctic Ocean
Data from the Nansen Basin of the Arctic Ocean are used to investigate the habitat and conditions under which the polar planktic foraminifer Neogloboquadrina pachyderma (sin.) calcifies. The vertical distribution of δ18O values of net-sampled speciments, together with their abundances and proportion...
Published in: | Earth and Planetary Science Letters |
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Elsevier
1997
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ftoceanrep:oai:oceanrep.geomar.de:14241 2023-05-15T14:26:40+02:00 Oxygen isotope composition of living Neogloboquadrina pachyderma (sin.) in the Arctic Ocean Bauch, Dorothea Carstens, J. Wefer, Gerold 1997 text https://oceanrep.geomar.de/id/eprint/14241/ https://oceanrep.geomar.de/id/eprint/14241/1/1997_Bauch_Carstens_Wefer_EPSL.pdf https://doi.org/10.1016/S0012-821X(96)00211-7 en eng Elsevier https://oceanrep.geomar.de/id/eprint/14241/1/1997_Bauch_Carstens_Wefer_EPSL.pdf Bauch, D. , Carstens, J. and Wefer, G. (1997) Oxygen isotope composition of living Neogloboquadrina pachyderma (sin.) in the Arctic Ocean. Earth and Planetary Science Letters, 146 (1-2). pp. 47-58. DOI 10.1016/S0012-821X(96)00211-7 <https://doi.org/10.1016/S0012-821X%2896%2900211-7>. doi:10.1016/S0012-821X(96)00211-7 info:eu-repo/semantics/restrictedAccess Article PeerReviewed 1997 ftoceanrep https://doi.org/10.1016/S0012-821X(96)00211-7 2023-04-07T15:03:55Z Data from the Nansen Basin of the Arctic Ocean are used to investigate the habitat and conditions under which the polar planktic foraminifer Neogloboquadrina pachyderma (sin.) calcifies. The vertical distribution of δ18O values of net-sampled speciments, together with their abundances and proportion of calcification, are compared with δ18O values from both water samples and foraminiferal tests from core-top sediments. Within the Nansen Basin the average depth of habitat of N. pachyderma (sin.) changes from about 150 m in the southern part to about 80 m in the northern. The average depth of calcification, however, in both regimes varies between 100 and 200 m water depth. δ18O data from net sampled N. pachyderma (sin.) are directly reflected in the core-top sediment data, but compared to equilibrium calcite δ18O values derived from measurements of the ambient water, a consistent offset of about 1‰ over all depth intervals is observed. While in the southern part of the Nansen Basin advection through Fram Strait of planktic foraminifers from further south may play a role, the data from the northern part of the Nansen Basin give clear evidence that the observed offset in δ18O values is caused by a vital effect of N. pachyderma (sin.). Article in Journal/Newspaper Arctic Arctic Arctic Ocean Foraminifera* Fram Strait Nansen Basin Neogloboquadrina pachyderma OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Arctic Arctic Ocean Earth and Planetary Science Letters 146 1-2 47 58 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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ftoceanrep |
language |
English |
description |
Data from the Nansen Basin of the Arctic Ocean are used to investigate the habitat and conditions under which the polar planktic foraminifer Neogloboquadrina pachyderma (sin.) calcifies. The vertical distribution of δ18O values of net-sampled speciments, together with their abundances and proportion of calcification, are compared with δ18O values from both water samples and foraminiferal tests from core-top sediments. Within the Nansen Basin the average depth of habitat of N. pachyderma (sin.) changes from about 150 m in the southern part to about 80 m in the northern. The average depth of calcification, however, in both regimes varies between 100 and 200 m water depth. δ18O data from net sampled N. pachyderma (sin.) are directly reflected in the core-top sediment data, but compared to equilibrium calcite δ18O values derived from measurements of the ambient water, a consistent offset of about 1‰ over all depth intervals is observed. While in the southern part of the Nansen Basin advection through Fram Strait of planktic foraminifers from further south may play a role, the data from the northern part of the Nansen Basin give clear evidence that the observed offset in δ18O values is caused by a vital effect of N. pachyderma (sin.). |
format |
Article in Journal/Newspaper |
author |
Bauch, Dorothea Carstens, J. Wefer, Gerold |
spellingShingle |
Bauch, Dorothea Carstens, J. Wefer, Gerold Oxygen isotope composition of living Neogloboquadrina pachyderma (sin.) in the Arctic Ocean |
author_facet |
Bauch, Dorothea Carstens, J. Wefer, Gerold |
author_sort |
Bauch, Dorothea |
title |
Oxygen isotope composition of living Neogloboquadrina pachyderma (sin.) in the Arctic Ocean |
title_short |
Oxygen isotope composition of living Neogloboquadrina pachyderma (sin.) in the Arctic Ocean |
title_full |
Oxygen isotope composition of living Neogloboquadrina pachyderma (sin.) in the Arctic Ocean |
title_fullStr |
Oxygen isotope composition of living Neogloboquadrina pachyderma (sin.) in the Arctic Ocean |
title_full_unstemmed |
Oxygen isotope composition of living Neogloboquadrina pachyderma (sin.) in the Arctic Ocean |
title_sort |
oxygen isotope composition of living neogloboquadrina pachyderma (sin.) in the arctic ocean |
publisher |
Elsevier |
publishDate |
1997 |
url |
https://oceanrep.geomar.de/id/eprint/14241/ https://oceanrep.geomar.de/id/eprint/14241/1/1997_Bauch_Carstens_Wefer_EPSL.pdf https://doi.org/10.1016/S0012-821X(96)00211-7 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Arctic Ocean Foraminifera* Fram Strait Nansen Basin Neogloboquadrina pachyderma |
genre_facet |
Arctic Arctic Arctic Ocean Foraminifera* Fram Strait Nansen Basin Neogloboquadrina pachyderma |
op_relation |
https://oceanrep.geomar.de/id/eprint/14241/1/1997_Bauch_Carstens_Wefer_EPSL.pdf Bauch, D. , Carstens, J. and Wefer, G. (1997) Oxygen isotope composition of living Neogloboquadrina pachyderma (sin.) in the Arctic Ocean. Earth and Planetary Science Letters, 146 (1-2). pp. 47-58. DOI 10.1016/S0012-821X(96)00211-7 <https://doi.org/10.1016/S0012-821X%2896%2900211-7>. doi:10.1016/S0012-821X(96)00211-7 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/S0012-821X(96)00211-7 |
container_title |
Earth and Planetary Science Letters |
container_volume |
146 |
container_issue |
1-2 |
container_start_page |
47 |
op_container_end_page |
58 |
_version_ |
1766299953801461760 |