Articles | Volume 19, issue 3
Research article
14 Mar 2023
Research article |  | 14 Mar 2023

A 600 kyr reconstruction of deep Arctic seawater δ18O from benthic foraminiferal δ18O and ostracode Mg ∕ Ca paleothermometry

Jesse R. Farmer, Katherine J. Keller, Robert K. Poirier, Gary S. Dwyer, Morgan F. Schaller, Helen K. Coxall, Matt O'Regan, and Thomas M. Cronin


Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on egusphere-2022-1212', Robert F. Spielhagen, 01 Dec 2022
    • AC1: 'Reply on RC1', Jesse Farmer, 07 Feb 2023
  • CC1: 'Comment on egusphere-2022-1212', Claude Hillaire-Marcel, 05 Dec 2022
    • AC3: 'Reply on CC1', Jesse Farmer, 07 Feb 2023
  • RC2: 'Comment on egusphere-2022-1212', Kaustubh Thirumalai, 08 Dec 2022
    • AC2: 'Reply on RC2', Jesse Farmer, 07 Feb 2023

Peer review completion

AR: Author's response | RR: Referee report | ED: Editor decision | EF: Editorial file upload
ED: Publish as is (09 Feb 2023) by Gerald Ganssen
AR by Jesse Farmer on behalf of the Authors (18 Feb 2023)  Author's response 
Short summary
Oxygen isotopes are used to date marine sediments via similar large-scale ocean patterns over glacial cycles. However, the Arctic Ocean exhibits a different isotope pattern, creating uncertainty in the timing of past Arctic climate change. We find that the Arctic Ocean experienced large local oxygen isotope changes over glacial cycles. We attribute this to a breakdown of stratification during ice ages that allowed for a unique low isotope value to characterize the ice age Arctic Ocean.