Articles | Volume 19, issue 4
Research article
04 Apr 2023
Research article |  | 04 Apr 2023

Lipid-biomarker-based sea surface temperature record offshore Tasmania over the last 23 million years

Suning Hou, Foteini Lamprou, Frida S. Hoem, Mohammad Rizky Nanda Hadju, Francesca Sangiorgi, Francien Peterse, and Peter K. Bijl


Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on cp-2022-79', Igor Obreht, 04 Nov 2022
    • AC1: 'Reply on RC1', Suning Hou, 19 Jan 2023
  • RC2: 'Comment on cp-2022-79', Benjamin Petrick, 04 Jan 2023
    • AC2: 'Reply on RC2', Suning Hou, 19 Jan 2023

Peer review completion

AR: Author's response | RR: Referee report | ED: Editor decision | EF: Editorial file upload
ED: Reconsider after major revisions (19 Jan 2023) by Bjørg Risebrobakken
AR by Suning Hou on behalf of the Authors (19 Jan 2023)  Author's response   Author's tracked changes   Manuscript 
ED: Referee Nomination & Report Request started (07 Feb 2023) by Bjørg Risebrobakken
RR by Igor Obreht (28 Feb 2023)
RR by Benjamin Petrick (02 Mar 2023)
ED: Publish subject to technical corrections (10 Mar 2023) by Bjørg Risebrobakken
AR by Suning Hou on behalf of the Authors (13 Mar 2023)  Author's response   Manuscript 
Short summary
Neogene climate cooling is thought to be accompanied by increased Equator-to-pole temperature gradients, but mid-latitudes are poorly represented. We use biomarkers to reconstruct a 23 Myr continuous sea surface temperature record of the mid-latitude Southern Ocean. We note a profound mid-latitude cooling which narrowed the latitudinal temperature gradient with the northward expansion of subpolar conditions. We surmise that this reflects the strengthening of the ACC and the expansion of sea ice.