期刊
HYDROLOGICAL SCIENCES JOURNAL
卷 63, 期 11, 页码 1636-1652出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/02626667.2018.1523614
关键词
climate indices; hydrological variability; seasonal forecast; rainy season; climate variability; Northeast Brazil
资金
- CAPES Foundation, Ministry of Education of Brazil [BEX 13470/13-2]
- Swedish Research Council (Vetenskapsradet)
- Federal University of Alagoas
- Lund University
- Federal University of Paraiba
The high variability in the hydrological regime of the Eastern Hydrological Region (EHR) of Northeast Brazil often results in floods and droughts, leading to serious socio-economic issues. Therefore, this work aimed to investigate connections between spatiotemporal hydrological variability of the EHR and large-scale climate phenomena. Multivariate statistical techniques were applied to relate climate indices with hydrological variables within two representative river basins in the EHR. The results indicated a multi-annual relationship between the state of the sea surface temperature of the Atlantic and Pacific oceans and anomalous hydrological variability in the basins. In addition, the northern Tropical Atlantic conditions were shown to play an important role in modulating the long-term variability of the hydrological response of the basins, whilst only extreme ENSO anomalies seemed to affect the rainy season. This knowledge is an important step towards long-term prediction of hydrological conditions and contributes to the improvement of water resources planning and management in the EHR.
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