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Annual Review of Marine Science

Volume 10, 2018

A Synoptic View of the Ventilation and Circulation of Antarctic Bottom Water from Chlorofluorocarbons and Natural Tracers

Abstract

Antarctic Bottom Water (AABW) is the coldest, densest, most prolific water mass in the global ocean. AABW forms at several distinct regions along the Antarctic coast and feeds into the bottom limb of the meridional overturning circulation, filling most of the global deep ocean. AABW has warmed, freshened, and declined in volume around the globe in recent decades, which has implications for the global heat and sea level rise budgets. Over the past three decades, the use of tracers, especially time-varying tracers such as chlorofluorocarbons, has been essential to our understanding of the formation, circulation, and variability of AABW. Here, we review three decades of temperature, salinity, and tracer data and analysis that have led to our current knowledge of AABW and how the southern component of deep-ocean ventilation is changing with time.

Keyword(s): abyssal warming, Antarctic Bottom Water, bottom limb of the meridional overturning circulation, changes in ocean circulation, chlorofluorocarbons, deep-ocean ventilation
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2018-01-03
2024-04-18
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A Synoptic View of the Ventilation and Circulation of Antarctic Bottom Water from Chlorofluorocarbons and Natural Tracers
Annual Review of Marine Science 10, 503 (2018); https://doi.org/10.1146/annurev-marine-121916-063414
/content/journals/10.1146/annurev-marine-121916-063414
/content/journals/10.1146/annurev-marine-121916-063414
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