@Article{SantosBragSansSant:2017:DeReHo,
author = "Santos, S{\'e}rgio Rodrigo Quadros and Braga, C{\'e}lia Campos
and Sansigolo, Cl{\'o}vis Angeli and Santos, Ana Paula Paes dos",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and
{Universidade Federal de Campina Grande (UFCG)} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de
Pesquisas Espaciais (INPE)}",
title = "Determina{\c{c}}{\~a}o de regi{\~o}es homog{\^e}neas do
{\'{\I}}ndice de Precipita{\c{c}}{\~a}o Normalizada (SPI) na
Amaz{\^o}nia Oriental",
journal = "Revista Brasileira de Meteorologia",
year = "2017",
volume = "32",
number = "1",
pages = "111--122",
keywords = "Amaz{\^o}nia, precipita{\c{c}}{\~a}o, regi{\~o}es
homog{\^e}neas, SPI, ACP, Amazon, rainfall, homogeneous regions,
SPI, PCA.",
abstract = "O presente estudo objetiva determinar Regi{\~o}es homog{\^e}neas
do SPI-6 na Amaz{\^o}nia Oriental e analisar as principais
caracter{\'{\i}}sticas dos eventos secos e chuvosos em cada
regi{\~a}o. Para o c{\'a}lculo do SPI, utilizou-se dados de
precipita{\c{c}}{\~a}o de 72 postos pluviom{\'e}tricos
distribu{\'{\i}}dos na Amaz{\^o}nia Oriental. Al{\'e}m disso,
aplicou-se o Agrupamento Hier{\'a}rquico de Ward para determinar
as Regi{\~o}es Homog{\^e}neas e a An{\'a}lise Fatorial em
Componentes Principais (ACP) para determinar os principais
padr{\~o}es de variabilidade clim{\'a}ticas associados aos
eventos secos e chuvosos. Os resultados obtidos pela An{\'a}lise
de Agrupamento mostraram a exist{\^e}ncia de tr{\^e}s
Regi{\~o}es Homog{\^e}neas em rela{\c{c}}{\~a}o ao SPI-6: RH-1
(litoral), RH-2 (central) e RH-3 (sul). De modo geral a
regi{\~a}o do litoral apresentou mais eventos secos que chuvosos.
Nas demais regi{\~o}es (central e sul) a situa{\c{c}}{\~a}o
{\'e} inversa, isto {\'e}, existem mais eventos de chuva,
por{\'e}m com pouca dura{\c{c}}{\~a}o. Por meio da ACP
verificou-se que os eventos secos e chuvosos na Amaz{\^o}nia
Oriental estavam associados, principalmente, a variabilidade
clim{\'a}tica dos oceanos Atl{\^a}ntico (Gradiente do
Atl{\^a}ntico) e Pac{\'{\i}}fico (ENOS). ABSTRACT: This paper
aims to determine homogeneous regions of the SPI-6 in the Eastern
Amazon and analyze the main characteristics of dry and rainy
events in each region. For the calculation of the SPI, we used
rainfall data of 72 rainfall stations distributed in the eastern
Amazon. Furthermore, were used Ward hierarchical grouping to
identify homogeneous regions and the Principal Components Factor
Analysis (PCA) to determine the main climate variability patterns
associated with dry and rainy events. The results showed three
homogeneous regions (HR): HR-1 (coast), HR-2 (central region) and
HR-3 (south). Generally, the coastal region showed more dry events
than rain. In the other regions (central and south) the situation
is reversed, i.e, there are more rain events, but with short
duration. The results obtained by PCA showed that the dry and wet
events in Eastern Amazonia were associated, mainly, to climate
variability associated the Atlantic Ocean (Atlantic Dipole) and
Pacific Ocean (ENSO).",
doi = "10.1590/0102-778632120160013",
url = "http://dx.doi.org/10.1590/0102-778632120160013",
issn = "0102-7786",
language = "pt",
targetfile = "santos_determinacao.pdf",
url = "http://www.scielo.br/pdf/rbmet/v32n1/0102-7786-rbmet-32-01-0111.pdf",
urlaccessdate = "19 abr. 2024"
}