Results 201 to 210 of about 173,175 (225)
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Deep Sea Research Part II: Topical Studies in Oceanography, 1997
Abstract The hydrographic survey made across the Antarctic Circumpolar Current (ACC) in the southwestern Crozet Basin during the April–May 1993 ANTARES-1 cruise revealed unprecedented strong cross-frontal injections of newly formed Antarctic Intermediate Water (AAIW) into the subtropical zone north of the ACC.
Young-Hyang Park, Lucien Gamberoni
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Abstract The hydrographic survey made across the Antarctic Circumpolar Current (ACC) in the southwestern Crozet Basin during the April–May 1993 ANTARES-1 cruise revealed unprecedented strong cross-frontal injections of newly formed Antarctic Intermediate Water (AAIW) into the subtropical zone north of the ACC.
Young-Hyang Park, Lucien Gamberoni
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Antarctic Bottom Water sensitivity to spatio-temporal variations in Antarctic meltwater fluxes
2022Ice sheet melting into the Southern Ocean can change the formation and properties of the Antarctic Bottom Water (AABW). Climate models generally mimic ice sheet melting by adding uniformly-distributed freshwater fluxes in the Southern Ocean. Uniform fluxes misrepresent the heterogeneous Antarctic ice sheet melting patterns, and could bias AABW ...
Wilton Aguiar +5 more
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Surges of Antarctic Bottom Water into the North Atlantic
Journal of Physical Oceanography, 1989Abstract Current meter records show that Antarctic Bottom Water surges into the western North Atlantic with roughly a sixty-day period. A time-dependent mass budget which incorporates estimated volume fluxes from geostrophic calculations, surges with a sixty-day period, a known time-average volume of the very coldest water in the North Atlantic, and a ...
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Changes in Antarctic bottom water off the Wilkes Land coast in the Australian-Antarctic Basin
Deep Sea Research Part I: Oceanographic Research Papers, 2023Long-term changes in Antarctic Bottom Water (AABW) off the Wilkes Land coast, East Antarctica, were investigated using historical hydrographic surveys and data from Deep Argo floats. Since the 1980s at the latest, AABW has contracted by approximately 11–14 m yr-1 and undergone isothermal freshening by approximately –0.6 × 10-3 yr-1. The contraction and
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On the Relationship between the Weddell Polynya and Antarctic Bottom Water Trends [PDF]
Journal of ClimateAbstract Satellite microwave observations of Antarctic sea ice started in 1973, just in time to capture a massive open water area enclosed in winter sea ice in the Weddell Sea, known as the Weddell Polynya. This polynya was roughly the size of the United Kingdom and it lasted through the winters of 1974–76 with observed ocean mixed ...
Spence, Paul +4 more
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Expansion of Antarctic Bottom Water driven by Antarctic warming in the last deglaciation
Nature GeosciencePast atmospheric CO2 fluctuations are thought to be intricately tied to ocean circulation changes involving Southern Ocean and North Atlantic dynamics. The ocean’s capability to store carbon has been linked to the expansion and contraction of southern-sourced waters, but their provenance and structure remain poorly characterized in the past.
Huang Huang +12 more
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The observed circumpolar decline of Antarctic Bottom Water
Antarctic Bottom Water (AABW) drives the lower limb of the global overturning circulation, ventilating the abyssal ocean with oxygen and sequestering heat and carbon. Using a new three-decade reconstruction from the SatGEM-2 monthly-varying (1993-2023) gravest empirical mode climatology, the first continuous, observation-driven ...James Wyatt +4 more
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GRACE Satellite Observations of Antarctic Bottom Water Transport Variability
Journal of Geophysical Research: OceansAbstract Antarctic Bottom Water (AABW) formation and transport constitute a key component of the global ocean circulation. Direct observations suggest that AABW volumes and transport rates may be decreasing, but these observations are too temporally or spatially sparse to determine the cause.
Jemma Jeffree +5 more
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The case for near-zero production of Antarctic Bottom Water
Geochimica et Cosmochimica Acta, 1977Abstract The most generally accepted production rate of Antarctic Bottom Water is 20 × 106 m3/sec required by the Stommel and Arons (1960) abyssal circulation model. According to this model, after sinking in the Weddell Sea, this water flows northward into the ocean basins and upwells through the thermocline.
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Antarctic Bottom Water Jets Flowing from the Vema Channel
Water (Switzerland), 2022Viktor Krechik +2 more
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