Planktonic Foraminiferal and Alkenone Records of the Last Deglaciation from the Eastern Arabian Sea
The oxygen isotope record of planktonic foraminifera from tropical core MD77194 (Eastern Arabian Sea) exhibits a clear two-step deglaciation with a brief δ 18 O transient event. In the tropics, this δ 18 O maximum could correspond to a cooling or to a change in the δ 18 O content of sea water. In th...
| Published in: | Quaternary Research |
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| Main Authors: | , |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
Cambridge University Press (CUP)
1999
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| Subjects: | |
| Online Access: | http://dx.doi.org/10.1006/qres.1999.2083 http://api.elsevier.com/content/article/PII:S0033589499920835?httpAccept=text/xml http://api.elsevier.com/content/article/PII:S0033589499920835?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400025941 |
| Summary: | The oxygen isotope record of planktonic foraminifera from tropical core MD77194 (Eastern Arabian Sea) exhibits a clear two-step deglaciation with a brief δ 18 O transient event. In the tropics, this δ 18 O maximum could correspond to a cooling or to a change in the δ 18 O content of sea water. In this study, past sea-surface temperature (SST) and primary production (PP) are reconstructed from foraminiferal transfer functions and compared to values estimated from alkenone measurements. SST and PP records from both proxies indicate a 1.5–2.5°C deglacial warming, coupled with a PP decrease, and a 0.5–1°C cooling during the Younger Dryas (YD). A detailed comparison between independent micropaleontological and geochemical proxies helps us identify potential biases and thus strengthen the paleo-reconstructions. |
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