The stable oxygen isotope signal of the calcareous-walled dinoflagellate Thoracosphaera heimii as a new proxy for sea-surface temperature
Palaeoceanographic and palaeoclimatic studies are often based on information derived from stable oxygen and carbon isotope measurements on planktonic microfossils. The present study shows that the stable oxygen isotope signal of the calcareous-walled dinoflagellate Thoracosphaera heimii constitutes...
Main Author: | |
---|---|
Other Authors: | , |
Format: | Doctoral or Postdoctoral Thesis |
Language: | English |
Published: |
Universität Bremen
2009
|
Subjects: | |
Online Access: | https://media.suub.uni-bremen.de/handle/elib/2764 https://nbn-resolving.org/urn:nbn:de:gbv:46-diss000117626 |
id |
ftsubbremen:oai:media.suub.uni-bremen.de:Publications/elib/2764 |
---|---|
record_format |
openpolar |
spelling |
ftsubbremen:oai:media.suub.uni-bremen.de:Publications/elib/2764 2023-05-15T18:00:53+02:00 The stable oxygen isotope signal of the calcareous-walled dinoflagellate Thoracosphaera heimii as a new proxy for sea-surface temperature Das stabile Sauerstoffisotopensignal des kalkwandigen Dinoflagellaten Thoracosphaera heimii als Anzeiger für Oberflächenwassertemperaturen Kohn, Marion Zonneveld, Karin A. F. Bohrmann, Gerhard 2009-12-03 application/pdf https://media.suub.uni-bremen.de/handle/elib/2764 https://nbn-resolving.org/urn:nbn:de:gbv:46-diss000117626 eng eng Universität Bremen FB5 Geowissenschaften https://media.suub.uni-bremen.de/handle/elib/2764 urn:nbn:de:gbv:46-diss000117626 info:eu-repo/semantics/openAccess stable oxygen isotopes calcareous-walled dinoflagellates Thoracosphaera heimii sea-surface temperature proxy 550 550 Earth sciences and geology ddc:550 Dissertation doctoralThesis 2009 ftsubbremen 2023-03-19T23:09:15Z Palaeoceanographic and palaeoclimatic studies are often based on information derived from stable oxygen and carbon isotope measurements on planktonic microfossils. The present study shows that the stable oxygen isotope signal of the calcareous-walled dinoflagellate Thoracosphaera heimii constitutes a promising new proxy for the reconstruction of past sea surface temperature. In a downcore study covering the last 45 ka within the upwelling region off Cape Blanc (NW Africa) we compare it to other well-established proxies like the planktonic foraminifera Globigerinoides ruber (pink) and Globigerina bulloides and the Mg/Ca ratio of G. ruber (pink).Detailed studies on both, the ecology and physiology of T. heimii improve the accuracy of future palaeotemperature reconstructions. Therefore, we investigated its recent seasonal and spatial distribution pattern and its calcification depth habitat in relation to environmental parameters. Past and future scenarios show changes in seawater pH in relation to surface water CO2 concentrations. In a culture experiment, we revealed the relationship between pH and stable oxygen isotopes. Doctoral or Postdoctoral Thesis Planktonic foraminifera Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen) |
institution |
Open Polar |
collection |
Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen) |
op_collection_id |
ftsubbremen |
language |
English |
topic |
stable oxygen isotopes calcareous-walled dinoflagellates Thoracosphaera heimii sea-surface temperature proxy 550 550 Earth sciences and geology ddc:550 |
spellingShingle |
stable oxygen isotopes calcareous-walled dinoflagellates Thoracosphaera heimii sea-surface temperature proxy 550 550 Earth sciences and geology ddc:550 Kohn, Marion The stable oxygen isotope signal of the calcareous-walled dinoflagellate Thoracosphaera heimii as a new proxy for sea-surface temperature |
topic_facet |
stable oxygen isotopes calcareous-walled dinoflagellates Thoracosphaera heimii sea-surface temperature proxy 550 550 Earth sciences and geology ddc:550 |
description |
Palaeoceanographic and palaeoclimatic studies are often based on information derived from stable oxygen and carbon isotope measurements on planktonic microfossils. The present study shows that the stable oxygen isotope signal of the calcareous-walled dinoflagellate Thoracosphaera heimii constitutes a promising new proxy for the reconstruction of past sea surface temperature. In a downcore study covering the last 45 ka within the upwelling region off Cape Blanc (NW Africa) we compare it to other well-established proxies like the planktonic foraminifera Globigerinoides ruber (pink) and Globigerina bulloides and the Mg/Ca ratio of G. ruber (pink).Detailed studies on both, the ecology and physiology of T. heimii improve the accuracy of future palaeotemperature reconstructions. Therefore, we investigated its recent seasonal and spatial distribution pattern and its calcification depth habitat in relation to environmental parameters. Past and future scenarios show changes in seawater pH in relation to surface water CO2 concentrations. In a culture experiment, we revealed the relationship between pH and stable oxygen isotopes. |
author2 |
Zonneveld, Karin A. F. Bohrmann, Gerhard |
format |
Doctoral or Postdoctoral Thesis |
author |
Kohn, Marion |
author_facet |
Kohn, Marion |
author_sort |
Kohn, Marion |
title |
The stable oxygen isotope signal of the calcareous-walled dinoflagellate Thoracosphaera heimii as a new proxy for sea-surface temperature |
title_short |
The stable oxygen isotope signal of the calcareous-walled dinoflagellate Thoracosphaera heimii as a new proxy for sea-surface temperature |
title_full |
The stable oxygen isotope signal of the calcareous-walled dinoflagellate Thoracosphaera heimii as a new proxy for sea-surface temperature |
title_fullStr |
The stable oxygen isotope signal of the calcareous-walled dinoflagellate Thoracosphaera heimii as a new proxy for sea-surface temperature |
title_full_unstemmed |
The stable oxygen isotope signal of the calcareous-walled dinoflagellate Thoracosphaera heimii as a new proxy for sea-surface temperature |
title_sort |
stable oxygen isotope signal of the calcareous-walled dinoflagellate thoracosphaera heimii as a new proxy for sea-surface temperature |
publisher |
Universität Bremen |
publishDate |
2009 |
url |
https://media.suub.uni-bremen.de/handle/elib/2764 https://nbn-resolving.org/urn:nbn:de:gbv:46-diss000117626 |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_relation |
https://media.suub.uni-bremen.de/handle/elib/2764 urn:nbn:de:gbv:46-diss000117626 |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1766170167599955968 |