Journal
SCIENCE
Volume 339, Issue 6119, Pages 568-570Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1225411
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Funding
- NSF [ANT-1043307, OCE-0928395, ATM-0854711]
- Australian Research Council [DP120100674]
- Directorate For Geosciences
- Div Atmospheric & Geospace Sciences [0854711] Funding Source: National Science Foundation
- Division Of Ocean Sciences
- Directorate For Geosciences [0928395] Funding Source: National Science Foundation
- Office of Polar Programs (OPP)
- Directorate For Geosciences [1043307] Funding Source: National Science Foundation
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Surface westerly winds in the Southern Hemisphere have intensified over the past few decades, primarily in response to the formation of the Antarctic ozone hole, and there is intense debate on the impact of this on the ocean's circulation and uptake and redistribution of atmospheric gases. We used measurements of chlorofluorocarbon-12 (CFC-12) made in the southern oceans in the early 1990s and mid-to late 2000s to examine changes in ocean ventilation. Our analysis of the CFC-12 data reveals a decrease in the age of subtropical subantarctic mode waters and an increase in the age of circumpolar deep waters, suggesting that the formation of the Antarctic ozone hole has caused large-scale coherent changes in the ventilation of the southern oceans.
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