Articles | Volume 15, issue 3
https://doi.org/10.5194/nhess-15-571-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/nhess-15-571-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Research article
| 
13 Mar 2015
Research article |
| 13 Mar 2015
Assessing drought cycles in SPI time series using a Fourier analysis
E. E. Moreira
CMA – Center of Mathematics and Applications, Faculty of Sciences and Technology, Nova University of Lisbon, 2829-516 Caparica, Portugal
D. S. Martins
Institute Dom Luiz, Faculty of Sciences, University of Lisbon, 1749-016 Lisbon, Portugal
L. S. Pereira
LEAF, Research Center for Landscape, Environment, Agriculture and Food, Institute of Agronomy, University of Lisbon, 1349-017 Lisbon, Portugal
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