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Water 2018, 10(11), 1617; https://doi.org/10.3390/w10111617

Key Climate Oscillation Factors Controlling Precipitation Variability during the Dry Season in Eastern Northeast Brazil: Study Case of Mundaú and Paraíba Do Meio River Basins

1
Campos Sertão, Universidade Federal de Alagoas, Delmiro Gouveia 57480-000, Brazil
2
Department of Water Resources Engineering, Lund University, Lund 221 00, Sweden
3
CAPES, Ministério da Educação do Brasil, Brasília 70040-031, Brazil
4
Centro de Tecnologia, Universidade Federal de Alagoas, Maceió 57072-900, Brazil
5
Centro de Tecnologia e Geociências, Universidade Federal de Pernambuco, Recife 50740-540, Brazil
*
Author to whom correspondence should be addressed.
Received: 24 September 2018 / Revised: 2 November 2018 / Accepted: 7 November 2018 / Published: 9 November 2018
(This article belongs to the Section Hydrology)
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Abstract

In Brazil, the northeastern region (NEB) is considered one of the most vulnerable areas of the country in terms of precipitation variability due to frequent drought episodes during the rainy season. Differently from the Northern NEB (NNEB), where dry season is consistently dry, the Eastern NEB (ENEB) exhibits a high interannual variability of precipitation during the dry season, including years exceeding 400 mm. This work aims at understanding key large-scale climate factors that modulate the high pluviometric variability of ENEB during the dry season. Multivariate statistical techniques were applied to identify the time-frequency relationship between precipitation variability and global climate phenomena. The results suggested that hydrological extreme events during the dry season became more frequent after the 1990s. Moreover, our findings also indicated a relationship, at multiannual time scales, between the state of El Niño Southern Oscillation (ENSO) and Atlantic Meridional Mode (AMM) and precipitation variability during the dry season. This additional knowledge may contribute to the formation of new perspectives of drought management, leading support to the development of a long-term drought forecasting framework, as well as to the improvement of the water resources management of the region. View Full-Text
Keywords: climate variability; drought; climate indices; precipitation; dry season; Northeast Brazil climate variability; drought; climate indices; precipitation; dry season; Northeast Brazil
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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da Silva Pereira, T.A.; Duda Costa, D.; Fragoso Jr., C.R.; Gico Lima Montenegro, S.M.; Bertacchi Uvo, C. Key Climate Oscillation Factors Controlling Precipitation Variability during the Dry Season in Eastern Northeast Brazil: Study Case of Mundaú and Paraíba Do Meio River Basins. Water 2018, 10, 1617.

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