Extremes climatic patterns negatively impact agriculture in Brazil and, as a result, cause
problems for rural communities that are highly dependent on natural resources, in particular the
state of Pará. Therefore, it is of fundamental importance to study the cassava farming
(ManihotesculentaCrantz) in face of future climatic risks, because Pará is the largest national
producer. The objective of this study was to analyze the modulation of the climatic mechanisms
of the Pacific and Atlantic Oceans on the pluviometric regime considering the municipal scale of
the Rural Region of the Metropolis of Belém (RRB), in northeastern Pará, as well as to detect the
relations between precipitation and productivity or yield of temporary cassava farming from
1990 to 2014 (25 years), including the analysis of impacts of extreme climatic years. The work
was divided into three parts: the first analyzed the influence of climatic extremes such as El
Niño, La Niña, North and South Gradient on RRB precipitation, using the percentiles technique;
In the second part, Spearman correlations were calculated between the precipitation and the
cassava yield and the results showed an inhomogeneous behavior throughout the region, i.e.,
there are municipalities that respond directly or indirectly to the pluviometric regime. In this
analysis, the annual precipitation showed a better relationship with cassava yield, whose planting
system occurs at two moments during the year (summer and winter plantings). In the third part,
the spatial data exploratory spatial analysis technique was applied, which revealed the need to
consider the spatial component in the evaluation of the relations between regional climate x
agriculture.
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