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Interannual variability of surface climate in the Amazon basin
Abstract
This empirical study examines the circulation mechanisms of anomalously wet and dry years in the Amazon basin. Data sources include surface ship observations in the tropical Atlantic, eastern Pacific, and Indian Oceans, as well as various hydrometeorological indices in Amazonia during 1951–1983. Rainfall and river water level anomalies in northern Amazonia are associated with distinct circulation patterns in the tropical Atlantic, particularly at the March–April peak of the rainy season. Thus, abundant rainfall in northern Amazonia and high Rio Negro water levels are accompanied by a strong North Atlantic high, steep meridional pressure gradient on its equatorward side, accelerated North‐east trades, and cool surface waters in the tropical North Atlantic. The intensified North‐east trades may entail enhanced boundary‐layer moisture transport from the tropical North Atlantic into the Amazon basin. This ensemble of atmospheric and oceanic anomalies is characteristic of, but not limited to, the high phase of the Southern Oscillation (defined by anomalously high/low pressure at Tahiti/Darwin).
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Cited by
Present-day South American climate
Garreaud, R. D., Vuille, M., Compagnucci, R., & Marengo, J. (2009) · Palaeogeography, Palaeoclimatology, Palaeoecology · doi:10.1016/j.palaeo.2007.10.032 · Cited by 1,619
Self-citationToward a Unified View of the American Monsoon Systems
Vera, C., Higgins, W., Amador, J., Ambrizzi, T., Garreaud, R., Gochis, D., Gutzler, D., Lettenmaier, D., Marengo, J., Mechoso, C. R., et al. (2006) · Journal of Climate · doi:10.1175/jcli3896.1 · Cited by 906
Self-citationExtreme seasonal droughts and floods in Amazonia: causes, trends and impacts
Marengo, J. A., & Espinoza, J. C. (2016) · International Journal of Climatology · doi:10.1002/joc.4420 · Cited by 901
Self-citationThe drought of Amazonia in 2005.
Marengo, J. A., Nobre, C. A., Tomasella, J., Oyama, M. D., Sampaio de Oliveira, G., de Oliveira, R., Camargo, H., Alves, L. M., & Brown, I. F. (2008) · Journal of Climate · doi:10.1175/2007jcli1600.1 · Cited by 725
Self-citationHaylock, M. R., Peterson, T. C., Alves, L. M., Ambrizzi, T., Anunciação, Y. M. T., Baez, J., Barros, V. R., Berlato, M. A., Bidegain, M., Coronel, G., et al. (2006) · Journal of Climate · doi:10.1175/jcli3695.1 · Cited by 719
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Metadata
- Authors
- Marengo, J. A.
- Venue
- International Journal of Climatology
- Publisher
- Wiley
- Published
- 1992-12
- Volume
- 12
- Issue
- 8
- Pages
- 853-863
- ISSN
- 0899-8418 (ISSN-L)
- 1097-0088
- OpenAlex
- W2141537899
- Cited by
- 277
- References
- 0
- FWCI
- 2.81
- Type
- journal article
- Language
- en
- Open access
- closed
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- Marengo, J. A. (1992). Interannual variability of surface climate in the Amazon basin. International Journal of Climatology. https://doi.org/10.1002/joc.3370120808
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