Oxygen and carbon isotope composition of modern planktic foraminifera and near-surface waters in the Fram Strait (Arctic Ocean) – a case-study
The upper 500 m of the water column and the sediment surface along an E–W transect in the Fram Strait were sampled for recent planktic foraminifera. The δ18O and δ13C values of the tests are compared to the stable isotope composition of water samples taken from the same depths, and related to the ch...
Published in: | Biogeosciences |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications (EGU)
2015
|
Subjects: | |
Online Access: | https://oceanrep.geomar.de/id/eprint/24746/ https://oceanrep.geomar.de/id/eprint/24746/1/bgd-11-8635-2014-print.pdf https://doi.org/10.5194/bg-12-1733-2015 |
id |
ftoceanrep:oai:oceanrep.geomar.de:24746 |
---|---|
record_format |
openpolar |
spelling |
ftoceanrep:oai:oceanrep.geomar.de:24746 2023-05-15T14:27:22+02:00 Oxygen and carbon isotope composition of modern planktic foraminifera and near-surface waters in the Fram Strait (Arctic Ocean) – a case-study Pados, Theodora Spielhagen, Robert F. Bauch, Dorothea Meyer, H. Segl, M. 2015 text https://oceanrep.geomar.de/id/eprint/24746/ https://oceanrep.geomar.de/id/eprint/24746/1/bgd-11-8635-2014-print.pdf https://doi.org/10.5194/bg-12-1733-2015 en eng Copernicus Publications (EGU) https://oceanrep.geomar.de/id/eprint/24746/1/bgd-11-8635-2014-print.pdf Pados, T., Spielhagen, R. F., Bauch, D. , Meyer, H. and Segl, M. (2015) Oxygen and carbon isotope composition of modern planktic foraminifera and near-surface waters in the Fram Strait (Arctic Ocean) – a case-study. Open Access Biogeosciences (BG), 12 (6). pp. 1733-1752. DOI 10.5194/bg-12-1733-2015 <https://doi.org/10.5194/bg-12-1733-2015>. doi:10.5194/bg-12-1733-2015 info:eu-repo/semantics/openAccess Article PeerReviewed info:eu-repo/semantics/article 2015 ftoceanrep https://doi.org/10.5194/bg-12-1733-2015 2023-04-07T15:13:38Z The upper 500 m of the water column and the sediment surface along an E–W transect in the Fram Strait were sampled for recent planktic foraminifera. The δ18O and δ13C values of the tests are compared to the stable isotope composition of water samples taken from the same depths, and related to the characteristics of the water column. The polar species Neogloboquadrina pachyderma (sin.) clearly dominates the species assemblage in the Fram Strait in the early summer, while the subpolar Turborotalita quinqueloba accounts only for 5–23%. In this area the average depth of calcification of N. pachyderma (sin.) lies between 70–150m water depth, T. quinqueloba shows a similar range with 50–120 m water depth. The δ18O values of N. pachyderma (sin.) show an average vital effect of about −1.5‰ compared to calculated equilibrium calcite values. Except for the upper ~ 75 m, the vertical profiles of δ13C of the net-sampled shells are nearly parallel to the values measured in the water column with an average offset of −1.6‰ and −3.6‰ for N. pachyderma (sin.) and T. quinqueloba, respectively. The discrepancy found in the upper ~ 75 m might indicate the influence of the "carbonate ion effect" on the carbon isotope incorporation in the tests. Oxygen and carbon isotopes from the sediment surface yield higher values than those from the water column for both species. This may be because specimens from the water column reflect a modern snapshot only, while tests from surface sediments record environmental parameters from the past ~ 1000 years. Article in Journal/Newspaper Arctic Arctic Arctic Ocean Foraminifera* Fram Strait Neogloboquadrina pachyderma OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Arctic Arctic Ocean Biogeosciences 12 6 1733 1752 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
The upper 500 m of the water column and the sediment surface along an E–W transect in the Fram Strait were sampled for recent planktic foraminifera. The δ18O and δ13C values of the tests are compared to the stable isotope composition of water samples taken from the same depths, and related to the characteristics of the water column. The polar species Neogloboquadrina pachyderma (sin.) clearly dominates the species assemblage in the Fram Strait in the early summer, while the subpolar Turborotalita quinqueloba accounts only for 5–23%. In this area the average depth of calcification of N. pachyderma (sin.) lies between 70–150m water depth, T. quinqueloba shows a similar range with 50–120 m water depth. The δ18O values of N. pachyderma (sin.) show an average vital effect of about −1.5‰ compared to calculated equilibrium calcite values. Except for the upper ~ 75 m, the vertical profiles of δ13C of the net-sampled shells are nearly parallel to the values measured in the water column with an average offset of −1.6‰ and −3.6‰ for N. pachyderma (sin.) and T. quinqueloba, respectively. The discrepancy found in the upper ~ 75 m might indicate the influence of the "carbonate ion effect" on the carbon isotope incorporation in the tests. Oxygen and carbon isotopes from the sediment surface yield higher values than those from the water column for both species. This may be because specimens from the water column reflect a modern snapshot only, while tests from surface sediments record environmental parameters from the past ~ 1000 years. |
format |
Article in Journal/Newspaper |
author |
Pados, Theodora Spielhagen, Robert F. Bauch, Dorothea Meyer, H. Segl, M. |
spellingShingle |
Pados, Theodora Spielhagen, Robert F. Bauch, Dorothea Meyer, H. Segl, M. Oxygen and carbon isotope composition of modern planktic foraminifera and near-surface waters in the Fram Strait (Arctic Ocean) – a case-study |
author_facet |
Pados, Theodora Spielhagen, Robert F. Bauch, Dorothea Meyer, H. Segl, M. |
author_sort |
Pados, Theodora |
title |
Oxygen and carbon isotope composition of modern planktic foraminifera and near-surface waters in the Fram Strait (Arctic Ocean) – a case-study |
title_short |
Oxygen and carbon isotope composition of modern planktic foraminifera and near-surface waters in the Fram Strait (Arctic Ocean) – a case-study |
title_full |
Oxygen and carbon isotope composition of modern planktic foraminifera and near-surface waters in the Fram Strait (Arctic Ocean) – a case-study |
title_fullStr |
Oxygen and carbon isotope composition of modern planktic foraminifera and near-surface waters in the Fram Strait (Arctic Ocean) – a case-study |
title_full_unstemmed |
Oxygen and carbon isotope composition of modern planktic foraminifera and near-surface waters in the Fram Strait (Arctic Ocean) – a case-study |
title_sort |
oxygen and carbon isotope composition of modern planktic foraminifera and near-surface waters in the fram strait (arctic ocean) – a case-study |
publisher |
Copernicus Publications (EGU) |
publishDate |
2015 |
url |
https://oceanrep.geomar.de/id/eprint/24746/ https://oceanrep.geomar.de/id/eprint/24746/1/bgd-11-8635-2014-print.pdf https://doi.org/10.5194/bg-12-1733-2015 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Arctic Ocean Foraminifera* Fram Strait Neogloboquadrina pachyderma |
genre_facet |
Arctic Arctic Arctic Ocean Foraminifera* Fram Strait Neogloboquadrina pachyderma |
op_relation |
https://oceanrep.geomar.de/id/eprint/24746/1/bgd-11-8635-2014-print.pdf Pados, T., Spielhagen, R. F., Bauch, D. , Meyer, H. and Segl, M. (2015) Oxygen and carbon isotope composition of modern planktic foraminifera and near-surface waters in the Fram Strait (Arctic Ocean) – a case-study. Open Access Biogeosciences (BG), 12 (6). pp. 1733-1752. DOI 10.5194/bg-12-1733-2015 <https://doi.org/10.5194/bg-12-1733-2015>. doi:10.5194/bg-12-1733-2015 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/bg-12-1733-2015 |
container_title |
Biogeosciences |
container_volume |
12 |
container_issue |
6 |
container_start_page |
1733 |
op_container_end_page |
1752 |
_version_ |
1766301073531731968 |