Variability of Rainfall in the Semi-Arid Region of Brazil

8 pages•Published: September 20, 2018

Celso Santos, Carlos Galvão, Reginaldo Brasil Neto and Isabel Meneses

Abstract

The Brazilian semi-arid region presents a highly variable rainfall regime in space and time. Although the mechanisms of rainfall have been well described and numerically modelled, reliable forecasts for more than six months in advance cannot be produced yet, as well as projections of climate change in the long term. This paper contributes to the understanding of the variability examining a more than 100-year time series of a rainfall gauge in this region, using three techniques: wavelet analysis, Mann- Kendall and Sen tests. The techniques allow the description of the patterns of variability of rainfall and suggest that there is not still a clear evidence of climate change.

Keyphrases: drought, mann kendall test, non stationary time series, trend analysis, wavelet transform

In: Goffredo La Loggia, Gabriele Freni, Valeria Puleo and Mauro De Marchis (editors). HIC 2018. 13th International Conference on Hydroinformatics, vol 3, pages 1868-1875.

Links:	https://easychair.org/publications/paper/z8Nw
	https://doi.org/10.29007/srn9

BibTeX entry

@inproceedings{HIC2018:Variability_Rainfall_Semi_Arid,
  author    = {Celso Santos and Carlos Galvão and Reginaldo Brasil Neto and Isabel Meneses},
  title     = {Variability of Rainfall in the Semi-Arid Region of Brazil},
  booktitle = {HIC 2018. 13th International Conference on Hydroinformatics},
  editor    = {Goffredo La Loggia and Gabriele Freni and Valeria Puleo and Mauro De Marchis},
  series    = {EPiC Series in Engineering},
  volume    = {3},
  publisher = {EasyChair},
  bibsource = {EasyChair, https://easychair.org},
  issn      = {2516-2330},
  url       = {/publications/paper/z8Nw},
  doi       = {10.29007/srn9},
  pages     = {1868-1875},
  year      = {2018}}

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