Negative ocean-atmosphere feedback in the South Atlantic Convergence Zone.
Open accessAbstract
The temporal evolution of the coupled variability between the South Atlantic Convergence Zone (SACZ) and the underlying sea surface temperature (SST) during austral summer is investigated using monthly data from the NCEP/NCAR reanalysis. A maximum covariance analysis shows that the SACZ is intensified [weakened] by warm [cold] SST anomalies in the beginning of summer, drifting northward. This migration is accompanied by the cooling [warming] of the original oceanic anomalies. The results confirm earlier analyses using numerical models that suggest the existence of a negative feedback between the SACZ and the underlying South Atlantic SST field. A linear regression of daily anomalies of SST and omega at 500 hPa to the equations of a stochastic oscillator reveals a negative ocean–atmosphere feedback in the western South Atlantic, stronger during January and February directly underneath the oceanic band of the SACZ.
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Direct measurements of the surface heat flux have proven valuable for diagnosing air-sea coupling in the southwestern tropical Atlantic near the Brazilian coast.
“Direct measurements of the surface heat flux have also proven valuable for diagnosing air-sea coupling in the southwestern tropical Atlantic near the Brazilian coast (Chaves and Nobre, 2004;De Almeida et al., 2007).”
From The tropical atlantic observing system (2019) · cites this paper as De Almeida et al., 2007
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The tropical atlantic observing system
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
Self-citation
- Authors
- De Almeida, R. A. F., Nobre, P., Haarsma, R. J., & Campos, E. J. D.
- Affiliations
- Centro de Previsão de Tempo e Estudos Climáticos Instituto Nacional de Pesquisas Espaciais Cachoeira Paulista Brazil
- Instituto Nacional de Pesquisas Espaciais (BR)
- Royal Netherlands Meteorological Institute (NL)
- Universidade de São Paulo (BR)
- Venue
- Geophysical Research Letters
- Publisher
- American Geophysical Union (AGU)
- Published
- 2007-09
- Volume
- 34
- Issue
- 18
- ISSN
- 0094-8276 (ISSN-L)
- 1944-8007
- OpenAlex
- W2021903295
- Cited by
- 80
- References
- 0
- Citations by year
- 2026: 1 · 2025: 5 · 2024: 3 · 2023: 5 · 2022: 8 · 2021: 2 · 2020: 5 · 2019: 16 · 2018: 4 · 2017: 5 · 2016: 4 · 2015: 5 · 2014: 3 · 2013: 4 · 2012: 1
- FWCI
- 2.51
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- Geophysical Research Letters (publishedVersion)
- Biblioteca Digital da Memória Científica do INPE (National Institute for Space Research) (submittedVersion)
- Topics
- Physical Sciences › Environmental Science › Global and Planetary Change › Climate variability and models
- Physical Sciences › Earth and Planetary Sciences › Atmospheric Science › Meteorological Phenomena and Simulations
- Physical Sciences › Earth and Planetary Sciences › Oceanography › Oceanographic and Atmospheric Processes
- Keywords
- South Atlantic Convergence Zone, ocean-atmosphere feedback, sea surface temperature anomalies, atmospheric convection, stochastic oscillator, austral summer, southwestern Atlantic
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