Preprints
https://doi.org/10.5194/egusphere-2024-816
https://doi.org/10.5194/egusphere-2024-816
27 Mar 2024
 | 27 Mar 2024

Opposing changes in subpolar ocean heat content due to meridional heat advection driven by the Southern Ocean wind anomaly

Xubin Ni, Ling Du, and Huangyuan Shi

Abstract. The global ocean has been warming significantly due to rapid climate change, leading to conspicuous changes in the subpolar Southern Ocean. Our study reveals that the heat exchange between Antarctic and subtropical oceans driven by wind, which plays an important role in modulating changes in regional ocean heat content (OHC) through meridional heat advections. In this study, we used the observed objective analysis and reanalysis datasets to explore the changes in subpolar ocean heat content and analyze attributions to the remarkable regional discrepancy. We found a notable difference in OHC trends between the Atlantic–Indian sector and the Pacific sector, which could be attributed to the inverse meridional heat advection caused by wind anomalies. Atlantic–Indian sector warming was significantly modulated by increasing meridional heat advection induced by the poleward westerly wind. In the Pacific sector, the enhanced wind resulted in substantial cold-water advection equatorward, causing significant cooling. These opposite advections are also occurring with the corresponding regional front movement, which also indicates the meridional heat exchange between oceans. This study highlights that wind anomalies play an important role in modulating the heat exchange between Antarctic and subtropical oceans. Consequently, the atmospheric forcing may become more significant to the heat redistribution in the Southern Ocean in the warmer future.

Publisher's note: Copernicus Publications remains neutral with regard to jurisdictional claims made in the text, published maps, institutional affiliations, or any other geographical representation in this preprint. The responsibility to include appropriate place names lies with the authors.
Xubin Ni, Ling Du, and Huangyuan Shi

Status: final response (author comments only)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on egusphere-2024-816', Anonymous Referee #1, 25 Apr 2024
    • AC1: 'Reply on RC1', Ling Du, 08 May 2024
  • RC2: 'Comment on egusphere-2024-816', Anonymous Referee #2, 01 May 2024
    • AC3: 'Reply on RC2', Ling Du, 24 May 2024
  • EC1: 'Comment on egusphere-2024-816', Bernadette Sloyan, 08 May 2024
    • AC2: 'Reply on EC1', Ling Du, 20 May 2024
  • EC2: 'Comment on egusphere-2024-816', Bernadette Sloyan, 08 May 2024
    • AC4: 'Reply on EC2', Ling Du, 27 May 2024
Xubin Ni, Ling Du, and Huangyuan Shi
Xubin Ni, Ling Du, and Huangyuan Shi

Viewed

Total article views: 281 (including HTML, PDF, and XML)
HTML PDF XML Total Supplement BibTeX EndNote
198 55 28 281 29 8 8
  • HTML: 198
  • PDF: 55
  • XML: 28
  • Total: 281
  • Supplement: 29
  • BibTeX: 8
  • EndNote: 8
Views and downloads (calculated since 27 Mar 2024)
Cumulative views and downloads (calculated since 27 Mar 2024)

Viewed (geographical distribution)

Total article views: 297 (including HTML, PDF, and XML) Thereof 297 with geography defined and 0 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Latest update: 12 Jun 2024
Download
Short summary
In this study, we used the observed objective analysis and reanalysis datasets to demonstrate the opposite heat changes between the Atlantic−Indian sector and the Pacific sector, which was due to the inverse meridional heat advections driven by different wind anomalies. Warming in the Atlantic−Indian sector were caused by the enhanced southward heat from the subtropical while cooling in the Pacific was facilitated by the significant cold-water advection driven by the strong low pressure.