Variabilidade espacial e temporal da precipitação de Santa Catarina

Abstract

O objetivo deste trabalho é caracterizar a variabilidade espacial e temporal da precipitação de Santa Catarina, verificando tendências e ciclos nas suas séries históricas. Foram analisadas 127 séries pluviométricas, distribuindo-as espacialmente, dividindo-as em seis regiões homogêneas. Selecionou-se estações pluviométricas representativas de cada região, que foram submetidas aos testes de Mann Kendall e Sen (análise de tendências) e à Análise de Ondaletas para observação do comportamento temporal da precipitação para a identificação de ciclos. Encontrou-se uma divisão espacial Leste-Oeste, com distribuições pluviométricas diferenciadas tanto em intensidade quanto em relação ao período chuvoso. As séries analisadas, de forma geral, não apresentaram tendência significativa. Quanto ao comportamento temporal, foi possível verificar ciclos com multiescalas temporais coincidentes com a eventos climáticos como El Niño e Oscilação Decadal do Pacífico (ODP).

Quali-quantitative water behaviour in an intensive swine production catchment in the Atlantic Forest biome, southern Brazil

“…Average rainfall values (mm/year), intra-and interannual averages (A) of gauges in the Fortaleza River catchment, *Missing values, lled by Iporã do Oeste meteorological station -Santa Catarina.The t test demonstrated that there is no signi cant difference between the monthly observations. The absence of difference is consistent with the study byBaptista and Severo (2018), which also found a homogeneous distribution of rainfall in the region over the range of years 1984 to 2014. In relation to annual precipitation, the highest annual rainfall was measured in 2015, with 2,562.2 mm/year, and the lowest in 2020, with 1,474.1 mm/year.Monthly precipitation showed a decreasing trend according to the Mann-Kendall test (z = −2.04, p-value = 0.041).…”

Análise da variabilidade temporal de precipitação no Estado de Santa Catarina - Brasil

“…The high altitudes of Dionísio Cerqueira and Xanxerê and the proximity to the ocean in the municipality of Laguna may be the main reasons for the increased precipitation in these regions. According to the study by Baptista, Severo (2018), between the western region and the Santa Catarina Plateau where Dionísio Cerqueira and Xanxerê are located, the annual total precipitation compared to the coast is higher, between 1,900 and 2,000 mm (West) and between 1,600 and 1,700 mm (Santa Catarina Plateau).…”

Agricultural Climate Risk Zoning for Gladiolus in Santa Catarina

“…Similar heat sum values were found in the literature for the climatic conditions of Santa Maria, in the State of Rio Grande do Sul, at different planting dates and for different cultivars, ranging from 849.5 to 1112.7°C day for the vegetative phase and from 215.7 to 312.5ºC day for the reproductive phase (STRECK et al, 2012). Rainfall is regularly distributed in the different regions of Santa Catarina throughout the year but was possible identify periods with high and low rainfall (BAPTISTA & SEVERO, 2018). Phenomena such as El Niño Southern Oscillation (ENSO) also influence the climatic conditions in several regions and can modify the rainfall regime (POWER & DELAGE, 2018).…”

“…Rainfall distribution varies between locations over the months (BAPTISTA & SEVERO, 2018). A study to characterize the annual rainfall rates in the State did not identify locations with defined dry seasons, considering a 75% probability of rainfall occurrence (COAN et al, 2014).…”

“…In São José, in the Coastal region, the greatest water restriction occurs over autumn and winter, while summer is the period with the highest rainfall. Moreover, the lowest annual rainfall accumulations in the State occur in the Coastal region (COAN et al, 2014;BAPTISTA & SEVERO, 2018).…”