Interannual to decadal changes in the western boundary circulation in the Atlantic at 11°S
Open accessAbstract
The western boundary current system off Brazil is a key region for diagnosing variations of the Atlantic meridional overturning circulation (AMOC) and the southern subtropical cell. In July 2013 a mooring array was installed off the coast at 11°S similar to an array installed between 2000 and 2004 at the same location. Here we present results from two research cruises and the first 10.5 months of moored observations in comparison to the observations a decade ago. Average transports of the North Brazil Undercurrent and the Deep Western Boundary Current (DWBC) have not changed between the observational periods. DWBC eddies that are predicted to disappear with a weakening AMOC are still present. Upper layer changes in salinity and oxygen within the last decade are consistent with an increased Agulhas leakage, while at depths water mass changes are likely related to changes in the North Atlantic as well as tropical circulation changes.
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An array of four velocity moorings has been installed at the Brazilian continental slope along 11S from 2000 to 2004 and since 2013, measuring the shallow and DWBC.
“An array consisting of four velocity moorings has been installed at the Brazilian continental slope along 11 • S from 2000 to 2004 and since 2013, measuring the shallow and DWBC (Schott et al., 2005;Hummels et al., 2015).”
From The tropical atlantic observing system (2019) · cites this paper as Hummels et al., 2015
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Cites
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Foltz, G. R., Brandt, P., Richter, I., Rodríguez-Fonseca, B., Hernandez, F., Dengler, M., Rodrigues, R. R., Schmidt, J. O., Yu, L., Lefevre, N., et al. (2019) · Frontiers in Marine Science · doi:10.3389/fmars.2019.00206 · Cited by 150 · see citing works
“An array consisting of four velocity moorings has been installed at the Brazilian continental slope along 11◦S from 2000 to 2004 and since 2013, measuring the shallow and DWBC (Schott et al., 2005; Hummels et al., 2015).”
MethodSelf-citation
- Authors
- Hummels, R., Brandt, P., Dengler, M., Fischer, J., Araujo, M., Veleda, D., & Durgadoo, J. V.
- Affiliations
- GEOMAR Helmholtz Centre for Ocean Research Kiel (DE)
- DOCEAN, Department of Oceanography UFPE Recife Brazil
- Corresponding author
- Hummels, Rebecca
- Venue
- Geophysical Research Letters
- Publisher
- American Geophysical Union (AGU)
- Published
- 2015-09-16
- Volume
- 42
- Issue
- 18
- Pages
- 7615-7622
- ISSN
- 0094-8276 (ISSN-L)
- 1944-8007
- OpenAlex
- W2149639619
- Cited by
- 79
- References
- 2
- Citations by year
- 2026: 5 · 2025: 6 · 2024: 1 · 2023: 9 · 2022: 5 · 2021: 18 · 2020: 7 · 2019: 12 · 2018: 7 · 2017: 6 · 2016: 1 · 2015: 2
- FWCI
- 4.44
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- Geophysical Research Letters (publishedVersion)
- Helmholtz Centre for Ocean Research Kiel (GEOMAR) (acceptedVersion, other-oa)
- Funders
- Deutsche Forschungsgemeinschaft (FOR1740)
- Topics
- Physical Sciences › Earth and Planetary Sciences › Oceanography › Oceanographic and Atmospheric Processes
- Physical Sciences › Environmental Science › Global and Planetary Change › Climate variability and models
- Physical Sciences › Earth and Planetary Sciences › Oceanography › Marine and coastal ecosystems
- Keywords
- western boundary currents, Atlantic meridional overturning circulation, Deep Western Boundary Current, Agulhas leakage, ocean eddies, water mass changes, interannual to decadal variability
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