@Article{SilvaJúniorAlSaAnArSi:2018:SpRaTr,
author = "Silva J{\'u}nior, Celso Henrique Leite and Almeida, Catherine
Torres de and Santos, Jessflan R. N. and Anderson, Liana O. and
Arag{\~a}o, Luiz Eduardo Oliveira e Cruz de and Silva,
Fabr{\'{\i}}cio B.",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {Ceuma University} and
{Centro Nacional de Monitoramento e Alertas de Desastre Naturais
(CEMADEN)} and {Instituto Nacional de Pesquisas Espaciais (INPE)}
and {Ceuma University}",
title = "Spatiotemporal rainfall trends in the Brazilian legal Amazon
between the years 1998 and 2015",
journal = "Water (Switzerland)",
year = "2018",
volume = "10",
number = "9",
pages = "e1220",
month = "Sept.",
keywords = "amazon forest, droughts, floods, Mann–Kendall test, TRMM.",
abstract = "Tropical forests play an important role as a reservoir of carbon
and biodiversity, specifically forests in the Brazilian Amazon.
However, the last decades have been marked by important changes in
the Amazon, particularly those associated with climatic extremes.
Quantifying the variability of rainfall patterns, hence, is
essential for understanding changes and impacts of climate upon
this ecosystem. The aim of this study was to analyse
spatiotemporal trends in rainfall along the Brazilian Legal Amazon
between 1998 and 2015. For this purpose, rainfall data derived
from the Tropical Rainfall Measuring Mission satellite (TRMM) and
nonparametric statistical methods, such as MannKendall and Sens
Slope, were used. Through this approach, some patterns were
identified. No evidence of significant rainfall trends (p
\≤ 0.05) for annual or monthly (except for September, which
showed a significant negative trend) averages was found. However,
significant monthly negative rainfall anomalies were found in
1998, 2005, 2010, and 2015, and positive in 1999, 2000, 2004,
2009, and 2013. The annual pixel-by-pixel analysis showed that
92.3% of the Brazilian Amazon had no rainfall trend during the
period analysed, 4.2% had significant negative trends (p \≤
0.05), and another 3.5% had significant positive trends (p
\≤ 0.05). Despite no clear temporal rainfall trends for
most of the Amazon had negative trends for September,
corresponding to the peak of dry season in the majority of the
region, and negative rainfall anomalies found in 22% of the years
analysed, which indicate that water-dependent ecological processes
may be negatively affected. Moreover, these processes may be under
increased risk of disruption resulting from other drought-related
events, such as wildfires, which are expect to be intensified by
rainfall reduction during the Amazonian dry season.",
doi = "10.3390/w10091220",
url = "http://dx.doi.org/10.3390/w10091220",
issn = "2073-4441",
language = "en",
targetfile = "silva junior_spatiotemporal.pdf",
urlaccessdate = "27 abr. 2024"
}