English
 
Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
 
 
DownloadE-Mail
 Local TagsRelease HistoryDetailsSummary
  Slowdown of Antarctic Bottom Water export driven by climatic wind and sea ice changes

Zhou, S., Meijers, A., Meredith, M., Abrahamsen, P., Holland, P., Silvano, A., Sallée, J.-b., Østerhus, S. (2023): Slowdown of Antarctic Bottom Water export driven by climatic wind and sea ice changes, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-0821

Item is

 

show all hide all

Basic

show hide
Item Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5016660 Version Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5016660_2
Genre: Conference Paper

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Zhou, Shenjie1, Author
Meijers, Andrew1, Author
Meredith, Michael1, Author
Abrahamsen, Povl1, Author
Holland, Paul1, Author
Silvano, Alessandro1, Author
Sallée, Jean-baptiste1, Author
Østerhus, Svein1, Author
Affiliations:
1IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations, ou_5011304              

Content

show
hide
Free keywords: -
 Abstract: Antarctic Bottom Water (AABW) is a key water mass in the global overturning circulation, flooding most of the world ocean abyss and pivotal for deep ocean ventilation and oceanic heat and carbon exchanges on multi-decadal to millennial timescales. The Weddell Sea contributes nearly half of global AABW through Weddell Sea Deep Water (WSDW), which along with denser underlying Weddell Sea Bottom Water (WSBW), is formed on the continental shelves via complex processes that include sea ice production. Here we report a multi-decadal decline of WSBW volume in repeat hydrographic sections. A 30% reduction of WSBW volume since 1992 is found, with the most significant volume decrease seen in the densest WSBW classes. This is likely driven by a multi-decadal reduction in dense water production on the Weddell Sea continental shelf associated with a >40% decline in the sea ice formation rate there. The ice production decrease is driven by northerly wind trends, partly in response to a negative polarity of the Interdecadal Pacific Oscillation since the early 1990s, with variability from the Amundsen Sea Low superposed. These results reveal key influences on the export of waters to the Atlantic abyss and their sensitivity to large-scale, multi-decadal climate variability.

Details

show
hide
Language(s): eng - English
 Dates: 2023
 Publication Status: Finally published
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.57757/IUGG23-0821
 Degree: -

Event

show
hide
Title: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Place of Event: Berlin
Start-/End Date: 2023-07-11 - 2023-07-20

Legal Case

show

Project information

show

Source 1

show
hide
Title: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Source Genre: Proceedings
 Creator(s):
Affiliations:
Publ. Info: Potsdam : GFZ German Research Centre for Geosciences
Pages: - Volume / Issue: - Sequence Number: - Start / End Page: - Identifier: -