Abstract
Concern about climate change has raised a number of issues related to precipitation extremes in the Brazilian semiarid region increasingly discussed face persistent drought phenomena and their association. Given this, the objective of this study is to analyze the behavior of rainfall in Southern Mesoregion Cearense and its relation to the thermal pattern of the Atlantic and Pacific oceans. Later, they were generated rainfall rates, including DCS, DCU, PCPRTOT. The indices were related to SST anomalies in the Atlantic and Pacific. The results indicate that the eastern portion of Mesoregion South Cearense presents increase in dry consecutive days. The total annual rainfall, there was a reduction in rainfall volumes. It was found that the DCS indices, DCU and PCPRINT were heavily influenced by the SST anomalies in the Atlantic and Pacific. With regard to the first two, the greatest influence is given in the central portion and the east region. As to PCPRINT 99% of the posts relate to SST variations. Thus, it was found that the participation of the Atlantic and Pacific oceans were very important to the settings of rainfall patterns found in the region.
Keywords:
sea surface temperature; drought events; El Niño
