期刊
SCIENCE ADVANCES
卷 6, 期 32, 页码 -出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/sciadv.aba7573
关键词
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资金
- NOAA Climate Program Office-Ocean Observing and Monitoring Division under the Southwest Atlantic Meridional Overturning Circulation (SAM) project [100007298]
- NASA [80NSSC18K0773]
- Cooperative Institute for Marine and Atmospheric Studies (CIMAS), a Cooperative Institute of the University of Miami
- NOAA [NA10OAR4320143]
- NOAA Climate Variability Program [GC16-212]
- NOAA Atlantic Oceanographic and Meteorological Laboratory
- SAMOC research project [11-ANR-56-004]
- European Union Horizon 2020 research and innovation program [633211]
- Sao Paulo State Research Foundation (FAPESP) [2011/50552-4, 2017/09659-6, 2018/09823-3, 2019/07833-4]
- Brazilian Navy (DHN)
- Brazilian Navy (SeCIRM)
- University of Sao Paulo (Oceanographic Institute) through the SAMOC-Br project
- CNPq [302018/2014-0]
- DST-NRF-SANAP programme
- South African DEA
- Servicio de Hidrografia Naval
- CONICET
- Inter-American Institute for Global Change Research grant (U.S. NSF grant) [CRN3070, GEO-1128040]
The Meridional Overturning Circulation (MOC) is a primary mechanism driving oceanic heat redistribution on Earth, thereby affecting Earth's climate and weather. However, the full-depth structure and variability of the MOC are still poorly understood, particularly in the South Atlantic. This study presents unique multiyear records of the oceanic volume transport of both the upper (similar to 3100 meters) overturning cells based on daily moored measurements in the South Atlantic at 34.5 degrees S. The vertical structure of the time-mean flows is consistent with the limited historical observations. Both the upper and abyssal cells exhibit a high degree of variability relative to the temporal means at time scales, ranging from a few days to a few weeks. Observed variations in the abyssal flow appear to be largely independent of the flow in the overlying upper cell. No meaningful trends are detected in either cell.
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