AMS 14C Study of Transient Events and of the Ventilation Rate of the Pacific Intermediate Water During the Last Deglaciation

• Published in: Radiocarbon
• Main Authors: Duplessy, Jean-Claude, Arnold, Maurice, Bard, Edouard, Juillet-Leclerc, Anne, Kallel, Nejib, Labeyrie, Laurent
• Other Authors: Centre des Faibles Radioactivités, Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 1989
• Subjects: [SDU.OCEAN]Sciences of the Universe [physics]/Ocean; Atmosphere; [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces; environment; Pacific; North Atlantic
• Online Access: https://hal.science/hal-03552865; https://hal.science/hal-03552865/document; https://hal.science/hal-03552865/file/ams-14c-study-of-transient-events-and-of-the-ventilation-rate-of-the-pacific-intermediate-water-during-the-last-deglaciation.pdf; https://doi.org/10.1017/s003382220001208x

International audience 14C analysis of monospecific samples of planktonic and benthic foraminifera were performed in deep-sea sediment cores from the Atlantic and Pacific Oceans by Accelerator Mass Spectrometry (AMS). These measurements demonstrate that the Younger Dryas cold event, first described in the north Atlantic, is also present at the same time in the north Pacific Ocean. The comparison of the 14C ages of planktonic and benthic foraminifera from the same sediment level in two Pacific cores shows that the ventilation time of the Pacific Ocean was greater than today during the last ice age, but significantly less than today during the deglaciation.