Foraminifera-bound nitrogen isotope data from eastern equatorial Pacific cores ME-24 and ME-27 back to the last ice age ...

• Main Authors: Studer, Anja S, Mekik, Figen, Ren, Haojia Abby, Hain, Mathis P, Oleynik, Sergey, Martínez-García, Alfredo, Haug, Gerald H, Sigman, Daniel M
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2020
• Subjects: Eastern Equatorial Pacific; Foraminifera-bound nitrogen isotopes; Holocene; Last Glacial; suboxia; water column denitrification; Planktonic foraminifera
• Online Access: https://dx.doi.org/10.1594/pangaea.925339; https://doi.pangaea.de/10.1594/PANGAEA.925339

Previous paleoceanographic applications of the N isotopes in the eastern equatorial Pacific have used the N isotopic composition of the bulk sediment, which can be biased by diagenetic alteration or foreign N input. To avoid these biases, we measured foraminifera shell-bound d15N (FB-d15N) on the two species Neogloboquadrina dutertrei and Neogloboquadrina incompta in two sediment cores extending back to the last ice age. The datafile contains FB-d15N data measured on the two sediment cores ME0005-24JC (0°1.3' N, 86°27.8' W, 2941m) and ME0005-27JC (1°51.2' S, 82°47.2'W, 2203m) from the eastern equatorial Pacific, as well as updated age models for the two sediment cores. Moreover, it contains estimated changes in Pacific oxygen concentration from the LGM to the Holocene.The age models for both sediment cores have been updated by Dubois et al. (2014) and are based on (1) radiocarbon ages measured on the planktonic foraminifera N. dutertrei by accelerator mass spectrometry, (2) correlation of benthic ...