@Article{OliveiraJúniorGoTeSiBlSoGa:2018:DrSeBa,
author = "Oliveira J{\'u}nior, Jos{\'e} Francisco de and Gois, Givanildo
de and Terassi, Paulo Miguel de Bodas and Silva J{\'u}nior,
Carlos Antonio da and Blanco, Cl{\'a}udio Jos{\'e} Cavalcante
and Sobral, Bruno Serafini and Gasparini, Kaio Allan Cruz",
affiliation = "{Universidade Federal de Alagoas (UFAL)} and {Universidade Federal
Fluminense (UFF)} and {Universidade de S{\~a}o Paulo (USP)} and
{Universidade do Estado de Mato Grosso (UNEMAT)} and {Universidade
Federal do Par{\'a} (UFPA)} and {Universidade Federal Fluminense
(UFF)} and {Instituto Nacional de Pesquisas Espaciais (INPE)}",
title = "Drought severity based on the SPI index and its relation to the
ENSO and PDO climatic variability modes in the regions North and
Northwest of the State of Rio de Janeiro - Brazil",
journal = "Atmospheric Research",
year = "2018",
volume = "212",
pages = "91--105",
month = "Nov.",
keywords = "Drought monitoring, Statistical indexes, Precipitation, Climatic
extremes, Interannual variability, Oceanic Niño index.",
abstract = "Drought severity in regions North and Northwest of Rio de Janeiro
state (SRJ) was evaluated using the Standardized Precipitation
Index (SPI) for the monthly (SPI-1) and annual (SPI-12) scales, as
well as its relationship with El Niño - Southern Oscillation
(ENSO) and Pacific Decadal Oscillation (PDO). Data of 14 rainfall
stations from a time series considering the period of 19672013 was
used. The SPI calculation was based on the SCI package available
at R software version 3.4.2 library. SPI categories used are Very
Dry, Moderately Dry and Extremely Dry associated with the hot and
cold phases of the PDO, followed by ENSO events according to the
Oceanic Niño index (ONI) in El Niño region 3.4 using an
interaction matrix. The matrix was evaluated by the coefficients
of Kendall (\τ), Sperman (\ρ), Pearson (r) and R2
determination, followed by Willmott's concordance index (d),
Standard Error of Estimation (SEE) and Student's t-test. The
intense activity of La Niña in the cold 1st phase of the PDO
increased rainfall with greater intensity in the Northwest region
compared to the North. In the 2nd cold phase of the PDO, the
events of El Niño, La Niña and Neutral years of the ENSO mutually
contribute to the changes in rainfall regime of both regions. The
most frequent SPI categories are Moderately Dry and Extremely Dry.
SPI-1 was efficient in perceiving extreme droughts, while SPI-12
results were not significant in the revealing of extreme droughts.
In addition, there was no relational pattern through statistical
indexes between droughts detected by SPI, ENSO and PDO.
Nevertheless, when ENSO cycles were persistent within both phases
of the PDO, droughts occurred, mainly on the monthly scale.",
doi = "10.1016/j.atmosres.2018.04.022",
url = "http://dx.doi.org/10.1016/j.atmosres.2018.04.022",
issn = "0169-8095",
language = "en",
targetfile = "oliveira_drought.pdf",
urlaccessdate = "25 abr. 2024"
}