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Antarctic Oscillation signal on precipitation anomalies over southeastern South America
Abstract
The relation between the Antarctic Oscillation (AAO) and the precipitation in southeastern South America (SESA) is examined. The AAO influence is particularly strong during winter and late spring although of opposite sign. In particular during spring, AAO positive (negative) phases are associated with the intensification of an upper‐level anticyclonic (cyclonic) anomaly, weakened (enhanced) moisture convergence and decreased (increased) precipitation over SESA. The combined influence of both ENSO and AAO on SESA precipitation was also explored and significant correlation values between both oscillations are only observed during spring. Results show that during that particular season, AAO activity produces a strong modulation of the ENSO signal on SESA precipitation.
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Cited by
Boisier, J. P., Alvarez-Garreton, C., Cordero, R. R., Damiani, A., Gallardo, L., Garreaud, R. D., Lambert, F., Ramallo, C., Rojas, M., & Rondanelli, R. (2018) · Elementa: Science of the Anthropocene · doi:10.1525/elementa.328 · Cited by 253
Santamans, C. D., Cordoba, F. E., Franco, M. G., Vignoni, P., & Lupo, L. C. (2021) · Science of The Total Environment · doi:10.1016/j.scitotenv.2020.144926 · Cited by 16
Metadata
- Authors
- Silvestri, G. E., & Vera, C. S.
- Venue
- Geophysical Research Letters
- Publisher
- American Geophysical Union (AGU)
- Published
- 2003-11
- Volume
- 30
- Issue
- 21
- ISSN
- 0094-8276 (ISSN-L)
- 1944-8007
- OpenAlex
- W2154920900
- Cited by
- 256
- References
- 0
- FWCI
- 3.11
- Type
- journal article
- Language
- en
- Open access
- closed
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- CoChat. (2026). Citation check: Antarctic Oscillation signal on precipitation anomalies over southeastern South America. https://app.cochat.ai/papers/10.1029/2003gl018277
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- Silvestri, G. E., & Vera, C. S. (2003). Antarctic Oscillation signal on precipitation anomalies over southeastern South America. Geophysical Research Letters. https://doi.org/10.1029/2003gl018277
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