Analysis of drought behavior trends Figure 6 shows the spatial distribution of the Sen’s slope of the drought behavior time series and the percentage of area with a significant trend based on different confidence levels over Paraíba State at various time scales.
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Evaluation of the TRMM product for monitoring drought over Paraíba State, northeastern Brazil: a trend analysis.
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The sentences
For SPI-1, most time series showed a trend with considerable significance, especially in Agreste Paraibano and Mata Paraibana.
The results of SPI gauge show that the border region between Agreste Paraibano and Borborema presents the greatest variation in trend slopes since the eastern portion has a positive trend, whereas the western portion presents a negative trend.