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Cited by 1,108

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Reevaluation of the oxygen isotopic composition of planktonic foraminifera: Experimental results and revised paleotemperature equations

Bemis, Bryan E., Spero, Howard J., Bijma, Jelle, Lea, David W.·1998·Paleoceanography

Abstract

Cultured planktonic foraminifera, Orbulina universa (symbiotic) and Globigerina bulloides (nonsymbiotic), are used to reexamine temperature:δ 18 O relationships at 15°–25°C. Relationships for both species can be described by linear equations. Equations for O. universa grown under low light (LL) and high light (HL) share a slope of −4.80 (0.21‰ °C−1) with a HL‐LL offset of −0.33‰ due to symbiont photosynthetic activity. The effect of [CO 32−] on O. universa is −0.002‰ µmol−1 kg−1 and is insensitive to temperature. For G. bulloides, ontogenetic effects produce size‐related trends in temperature:δ 18 O, whereby larger shells are enriched in 18 O relative to smaller specimens. The O. universa temperature:δ 18 O relationships are more accurate than previously published equations for describing plankton tow data. Our equations do not explain planktonic core top data with the same precision but provide a good fit to benthic Cibicidoides data below 10°C. Temperature:δ 18 O relationships for G. bulloides provide good agreement with field data for this species from the northeast Pacific.

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Metadata

Authors
Bemis, B. E., Spero, H. J., Bijma, J., & Lea, D. W.
Venue
Paleoceanography
Published
1998-04
Volume
13
Issue
2
Pages
150-160
ISSN
  • 0883-8305 (ISSN-L)
  • 1944-9186
OpenAlex
W1968988439
Cited by
1,108
References
8
FWCI
11.09
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Reevaluation of the oxygen isotopic composition of planktonic foraminifera: Experimental results and revised paleotemperature equations. https://app.cochat.ai/papers/10.1029/98pa00070
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Bemis, B. E., Spero, H. J., Bijma, J., & Lea, D. W. (1998). Reevaluation of the oxygen isotopic composition of planktonic foraminifera: Experimental results and revised paleotemperature equations. Paleoceanography. https://doi.org/10.1029/98pa00070

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