Pacific sub-decadal sea surface temperature variations contributed to recent Antarctic Sea ice decline trend

Qigang Wu (), Yejian Ma, Aixue Hu, Nan Rosenbloom, Lei Zhang (), Heng Liu, Shizuo Liu, Luping Yang and Chang Yang
Additional contact information
Qigang Wu: Fudan University
Yejian Ma: Fudan University
Aixue Hu: National Center for Atmospheric Research
Nan Rosenbloom: National Center for Atmospheric Research
Lei Zhang: Chinese Academy of Sciences
Heng Liu: Chinese Academy of Sciences
Shizuo Liu: Duke University
Luping Yang: China Meteorological Administration Training Centre Hunan Branch
Chang Yang: Fudan University

Nature Communications, 2025, vol. 16, issue 1, 1-14

Abstract: Abstract Total sea ice extent (SIE) across the Southern Ocean increased from 1979-2014, but declined rapidly after 2016. Significant sea ice decline has emerged since the peak of SIE in 2014, coincident with Pacific sub-decadal sea surface temperature (SST) trends resembling a strong La Niña-like cold condition and the negative phase of the interdecadal Pacific oscillation (IPO). Previous studies suggest that the warm subsurface Southern Ocean was an important driver of the low sea ice in spring 2016 and the sustained low sea ice state since. Here we show that the observed atmospheric circulation changes near Antarctica during the period from June 2013-May 2023 are conducive to increasing surface temperature via warm advection from north and reducing Antarctic SIE, involving a deepening of the Amundsen Sea Low and anomalous high pressures over the Weddell Sea and West Pacific sectors. Through coupled pacemaker experiments, we demonstrate that Pacific sub-decadal SST trends have dominantly driven these atmospheric circulation changes through tropical–polar teleconnections and also induced significant Southern Ocean subsurface warming in the recent decade. The consequent decreasing SIE has enhanced the Southern Ocean subsurface warming effect and significantly contributed to the rapid Antarctic SIE decline.

Date: 2025
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.nature.com/articles/s41467-025-58788-1 Abstract (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:16:y:2025:i:1:d:10.1038_s41467-025-58788-1

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/s41467-025-58788-1

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().