ANALYSIS OF PRECIPITATION IN BELÉM-PA CITY (PERIOD 1967-2016)

• DOI: 10.22533/at.ed.5362206126

• Palavras-chave: -

• Keywords: urban climate, el niño, la niña, ZCIT

• Abstract:

  The objective of the study was to analyze the precipitation behavior in the city of Belém do Pará (1^st 49’S and 48º49’W), between 01/01/1967 and 12/31/2016, the daily data of the National Institute of Meteorology (INMET), are grouped by decades, years and months, to identify the largest and smallest rainfall in the period. Using the percentile technique, events with an upper value of 63mm, considering k-eximo of 0.99, were separated, defining a limit for the study of extreme events and verifying the variation during the period. The results showed a tendency of growth of the amount of average precipitation in the last five decades; however, in the last decade it presents a significant drop, where the precipitation reached 16.9mm. Previous studies indicate that these variations in the precipitation of the city of Belém (PA) are little influenced by the phenomenon of Niño (EN and LN). Concluding that the Intercropical Convergence Zone (ICCIT) and the Instability Line (LS) are the main modulators of precipitation in Belém (PA). The precipitation behavior is similar to the parameters: Southern oscillation index (IOS), quasi-benial oscillation (OQB) and CIIFEN Atlantic Thermal Index (ITA), which refer to global climate change conditions.