Open AccessRainfall distribution in a region of Amazon rainforest in the north of Mato Grosso
Author(s) -
Rodrigo Gomes Branquinho,
Djavan Pinheiro Santos,
João Carlos Rocha dos Anjos,
Gustavo Cassiano da Silva,
Gustavo Henrique Mendes Brito,
Alechsandär Gahal Barcelo Carminatii.
Publication year - 2021
Publication title -
acta agronómica/acta agronómica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.216
H-Index - 8
eISSN - 2323-0118
pISSN - 0120-2812
DOI - 10.15446/acag.v69n3.84187
Subject(s) - wet season , precipitation , amazon rainforest , el niño southern oscillation , dry season , geography , period (music) , environmental science , climatology , agriculture , rainforest , meteorology , ecology , geology , biology , physics , cartography , archaeology , acoustics
Rainfall predominantly influences economic activity in northern of MatoGrosso. The scarcity of rainfall limits agricultural production, and its excess hinders the flow of production on back roads. These obstacles impose the need for greater knowledge of rainfall in distant regions of the state, such as Paranorte, in Juara-MT. This study aimed to identify the beginning and end of the rainy season, as well as the frequency and duration of dry days, besides to investigate causal relationships of rainfall with ENSO (El Niño de Oscillation Sul) phenomena. Methods based on rainfall quantity and continuity were adopted. The results showed that in Paranorte, the accumulated annual precipitation varies between 2322 and 2720 mm. The months of the year are divided into a dry period (June, July and August), a period of low rainfall (May and September - ≈ 80 mm) and a period of high rainfall (October, November, December, January, February, March and April, with 214 to 464 mm). Prolonged droughts occur most often at the beginning (September) and end (May) of the rainy season. In turn, ENSO phenomena influence rainfall only in spring.