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The Southern Ocean: A ventilation contributor with multiple sources
Author(s) -
Hellmer Hartmut H.,
Beckmann Aike
Publication year - 2001
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2001gl013054
Subject(s) - antarctic bottom water , water mass , southern hemisphere , oceanography , circumpolar deep water , bottom water , north atlantic deep water , geology , pacific ocean , ocean heat content , antarctic intermediate water , deep ocean water , deep water , indian ocean , thermohaline circulation , climatology
Based on water mass analysis, the Weddell Sea in the Atlantic sector was identified as the major source for Southern Ocean bottom water. Recent observations, and tracer analysis and modeling indicate that the Indian‐Pacific sector might be the location of additional bottom water sources similar in magnitude as their Atlantic counterpart. Numerical model results presented here suggest that the Atlantic and Indian‐Pacific contributions to Southern Ocean bottom water are roughly equal but for waters of different density. The observationally derived formation rate of dense Antarctic Bottom Water of the order of 10 Sv (1 Sv=10 6 m³ s −1 ) is confirmed by the model results but doubles if the lighter component of the Indian‐Pacific sector is included. This result suggests that southern and northern hemisphere sources are equal contributors to the ventilation of the deep world ocean.