δ44/40Ca, Mg/Ca and δ18O ratios of planktonic foraminifera from the Nordic Seas
A new approach for a solid delta44/40Ca temperature calibration of the polar to subpolar planktonic foraminifera N. pachyderma (sin.) is presented, based on a broad sample pool comprising North and South Atlantic genotyped net catches and Nordic Seas core top sample material. With this new additiona...
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ftunivkiel:oai:macau.uni-kiel.de:diss_mods_00002079 2024-06-23T07:54:50+00:00 δ44/40Ca, Mg/Ca and δ18O ratios of planktonic foraminifera from the Nordic Seas Kozdon, Reinhard Eisenhauer, Anton Weinelt, Mara 2007 https://nbn-resolving.org/urn:nbn:de:gbv:8-diss-20795 https://macau.uni-kiel.de/receive/diss_mods_00002079 https://macau.uni-kiel.de/servlets/MCRFileNodeServlet/dissertation_derivate_00002079/d2079.pdf eng eng https://nbn-resolving.org/urn:nbn:de:gbv:8-diss-20795 https://macau.uni-kiel.de/receive/diss_mods_00002079 https://macau.uni-kiel.de/servlets/MCRFileNodeServlet/dissertation_derivate_00002079/d2079.pdf https://rightsstatements.org/page/InC/1.0/ info:eu-repo/semantics/openAccess ddc:550 thesis Foraminiferen Meerwasser Temperaturmessung Ca-isotopes N. pachyderma planktonic Nordic Seas Norwegian Current Proxy Mg/Ca trace metals Sea Surface Temperature dissertation Text doc-type:PhDThesis 2007 ftunivkiel 2024-06-12T14:21:16Z A new approach for a solid delta44/40Ca temperature calibration of the polar to subpolar planktonic foraminifera N. pachyderma (sin.) is presented, based on a broad sample pool comprising North and South Atlantic genotyped net catches and Nordic Seas core top sample material. With this new additional SST proxy, the 'cold end' error of proxy temperature calibrations was addressed in combining delta44/40Ca, Mg/Ca and delta18O ratios in tests of N. pachyderma (sin.). At water temperatures below about 3.5°C, the proxy to temperature relationship recorded in the Mg/Ca and delta44/40Ca signal simultaneously disappears. Based on these ‘cold-end‘ proxy-data we present a model demonstrating that the aberrant delta44/40Ca and Mg/Ca ratios in N. pachyderma (sin.) calcified in cold polar waters can be interpreted by a two-step chemical modification of vacuolized seawater during its cytosolar transport to the calcification site. Doctoral or Postdoctoral Thesis Nordic Seas Planktonic foraminifera MACAU: Open Access Repository of Kiel University |
institution |
Open Polar |
collection |
MACAU: Open Access Repository of Kiel University |
op_collection_id |
ftunivkiel |
language |
English |
topic |
ddc:550 thesis Foraminiferen Meerwasser Temperaturmessung Ca-isotopes N. pachyderma planktonic Nordic Seas Norwegian Current Proxy Mg/Ca trace metals Sea Surface Temperature |
spellingShingle |
ddc:550 thesis Foraminiferen Meerwasser Temperaturmessung Ca-isotopes N. pachyderma planktonic Nordic Seas Norwegian Current Proxy Mg/Ca trace metals Sea Surface Temperature Kozdon, Reinhard δ44/40Ca, Mg/Ca and δ18O ratios of planktonic foraminifera from the Nordic Seas |
topic_facet |
ddc:550 thesis Foraminiferen Meerwasser Temperaturmessung Ca-isotopes N. pachyderma planktonic Nordic Seas Norwegian Current Proxy Mg/Ca trace metals Sea Surface Temperature |
description |
A new approach for a solid delta44/40Ca temperature calibration of the polar to subpolar planktonic foraminifera N. pachyderma (sin.) is presented, based on a broad sample pool comprising North and South Atlantic genotyped net catches and Nordic Seas core top sample material. With this new additional SST proxy, the 'cold end' error of proxy temperature calibrations was addressed in combining delta44/40Ca, Mg/Ca and delta18O ratios in tests of N. pachyderma (sin.). At water temperatures below about 3.5°C, the proxy to temperature relationship recorded in the Mg/Ca and delta44/40Ca signal simultaneously disappears. Based on these ‘cold-end‘ proxy-data we present a model demonstrating that the aberrant delta44/40Ca and Mg/Ca ratios in N. pachyderma (sin.) calcified in cold polar waters can be interpreted by a two-step chemical modification of vacuolized seawater during its cytosolar transport to the calcification site. |
author2 |
Eisenhauer, Anton Weinelt, Mara |
format |
Doctoral or Postdoctoral Thesis |
author |
Kozdon, Reinhard |
author_facet |
Kozdon, Reinhard |
author_sort |
Kozdon, Reinhard |
title |
δ44/40Ca, Mg/Ca and δ18O ratios of planktonic foraminifera from the Nordic Seas |
title_short |
δ44/40Ca, Mg/Ca and δ18O ratios of planktonic foraminifera from the Nordic Seas |
title_full |
δ44/40Ca, Mg/Ca and δ18O ratios of planktonic foraminifera from the Nordic Seas |
title_fullStr |
δ44/40Ca, Mg/Ca and δ18O ratios of planktonic foraminifera from the Nordic Seas |
title_full_unstemmed |
δ44/40Ca, Mg/Ca and δ18O ratios of planktonic foraminifera from the Nordic Seas |
title_sort |
δ44/40ca, mg/ca and δ18o ratios of planktonic foraminifera from the nordic seas |
publishDate |
2007 |
url |
https://nbn-resolving.org/urn:nbn:de:gbv:8-diss-20795 https://macau.uni-kiel.de/receive/diss_mods_00002079 https://macau.uni-kiel.de/servlets/MCRFileNodeServlet/dissertation_derivate_00002079/d2079.pdf |
genre |
Nordic Seas Planktonic foraminifera |
genre_facet |
Nordic Seas Planktonic foraminifera |
op_relation |
https://nbn-resolving.org/urn:nbn:de:gbv:8-diss-20795 https://macau.uni-kiel.de/receive/diss_mods_00002079 https://macau.uni-kiel.de/servlets/MCRFileNodeServlet/dissertation_derivate_00002079/d2079.pdf |
op_rights |
https://rightsstatements.org/page/InC/1.0/ info:eu-repo/semantics/openAccess |
_version_ |
1802647107396435968 |