Abyssal connections of Antarctic bottom water in a Southern Ocean state estimate

TitleAbyssal connections of Antarctic bottom water in a Southern Ocean state estimate
Publication TypeJournal Article
Year of Publication2013
Authorsvan Sebille E., Spence P., Mazloff MR, England M.H, Rintoul S.R, Saenko O.A
JournalGeophysical Research Letters
Date Published2013/05
Type of ArticleArticle
ISBN Number0094-8276
Accession NumberWOS:000328840200052
KeywordsAntarctic Bottom Water; atlantic; deep; deep ocean circulation; Lagrangian trajectories; model; sea; Southern Ocean; thermohaline circulation

Antarctic Bottom Water (AABW) is formed in a few locations around the Antarctic continent, each source with distinct temperature and salinity. After formation, the different AABW varieties cross the Southern Ocean and flow into the subtropical abyssal basins. It is shown here, using the analysis of Lagrangian trajectories within the Southern Ocean State Estimate (SOSE) model, that the pathways of the different sources of AABW have to a large extent amalgamated into one pathway by the time it reaches 31 degrees S in the deep subtropical basins. The Antarctic Circumpolar Current appears to play an important role in the amalgamation, as 70% of the AABW completes at least one circumpolar loop before reaching the subtropical basins. This amalgamation of AABW pathways suggests that on decadal to centennial time scales, changes to properties and formation rates in any of the AABW source regions will be conveyed to all three subtropical abyssal basins.

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