Air Temperature and Precipitation Climatologies over Paraíba Sul River Basin, Southeast
                        Brazil

Brasiliense, Camila Silva; Dereczynski, Claudine Pereira; Satyamurty, Prakki; Chou, Sin Chan; Calado, Renata Novaes

doi:10.11137/2020_1_355_365

Cited by 7 publications

(8 citation statements)

References 4 publications

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“…The highest average annual values of accumulated precipitation were recorded in mountainous regions, such as Fazenda Agulhas Negras with 2385 mm (1242 m) and Visconde de Mauá with 2234 mm (1030 m), both in the Serra da Mantiqueira, a mountainous region. These results agree with those presented by [47] who associated higher precipitation values with sites located at altitudes higher than 2000 m. However, the region of the Baixo Paraíba do Sul, located in the north and northwest of Rio de Janeiro, and characterized as a depression region, registers annual precipitation values below 1000 mm/year (Figure 1). The difference in annual accumulated values of precipitation can be associated on a broader scale by the valley-mountain circulation, where precipitation occurs due to orographic forcing and Figure 3 displays the spatial distribution of p95 and p99 thresholds for extreme and very extreme rainfall events during the dry and wet seasons.…”

Section: Precipitation Data Analysissupporting

confidence: 92%

“…The difference in annual accumulated values of precipitation can be associated on a broader scale by the valley-mountain circulation, where precipitation occurs due to orographic forcing and presents an intense gradient towards regions with higher altitudes. The spatial precipitation patterns are in line with the results of [19,47], through different datasets. The box plot shows the annual accumulated precipitation values in the PSRB from 1939 to 2020 in Figure 2b.…”

Section: Precipitation Data Analysissupporting

confidence: 81%

“…presents an intense gradient towards regions with higher altitudes. The spatial precipitation patterns are in line with the results of [19,47], through different datasets.…”

Section: Precipitation Data Analysissupporting

confidence: 81%

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Hydrological and Precipitation Extremes and Trends over the Paraiba do Sul River Basin, Brazil

Oliveira

Carvalho

Silva

et al. 2023

Climate

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The Paraiba do Sul River Basin (PSRB) is a vital source of water resources in Brazil, providing water for human consumption, industry, agriculture, and hydroelectric energy generation. As part of one of the most developed areas of the country, in the Southeast of Brazil, the region is vulnerable to the impacts of climate change, with evidence of extreme events such as droughts and floods affecting the availability and quality of water. Hence, this study analyzes precipitation and streamflow rates data from the PSRB between 1939–2020 to investigate the spatial variability of average patterns and extreme events, trends, and their relationship with urban growth and socioeconomic development. The analysis reveals significant spatial variations in precipitation and runoff rates, with higher altitude areas, such as the Serra da Mantiqueira, exhibiting higher average values. Moreover, the Mann–Kendall trend results showed in most of the sites no significant trend regarding precipitation data; however, about 50% of the sites in the PSRB presented a decreasing trend of runoff rates. Since the precipitation does not explain identified changes in the hydrological patterns, the evaluation of the area’s urban growth and socioeconomic development throughout the decades suggested that human activities, such as those associated with urbanization, have played a significant role in altering the runoff patterns in the basin. These findings highlight the importance of sustainable land-use planning and water resource-management practices in the PSRB to mitigate the negative impacts of urbanization on the hydrological cycle and to enhance the resilience of the region’s water resources.

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Section: Precipitation Data Analysissupporting

confidence: 92%

Section: Precipitation Data Analysissupporting

confidence: 81%

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Hydrological and Precipitation Extremes and Trends over the Paraiba do Sul River Basin, Brazil

Oliveira

Carvalho

Silva

et al. 2023

Climate

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“…The region presents a seasonal precipitation variability, with a well defined rainy and dry season, associated with the South America Monsoon System (Reboita et al, 2010). In winter (end of June to end of September), the accumulated precipitation does not exceed 200 mm and in summer the values reach 800 mm (Brasiliense et al, 2020). Ayres (2010) showed that floods and severe storms have a high frequency in the region.…”

Section: Introductionmentioning

confidence: 99%

The influence of climate parameters on fires in the Paraíba do Sul River valley, southeast Brazil

Oliveira,

Massi,

Bortolozo

et al. 2023

Rev. ambiente água

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Brazilian biomes have been experiencing an increase in fires during the whole year, but fires increase substantially during drier periods. Several indexes might be good indicators of the severity of the droughts, such as The Rainfall Anomaly Index (RAI), Standardized Precipitation Index (SPI) and the Vegetation Health Index (VHI). This study therefore aimed to understand the dynamics of climate, using some indexes and fires in Paraíba do Sul River Valley, Paulista portion, to verify whether fire is more likely to spread in hotter and drier years. We hypothesized that fire events are more frequent and burned areas are larger in hotter and drier years in the region. By conducting a cross-correlation analysis and separating the monthly data into dry and rainy seasons, it was possible to establish a correlation between climate parameters and fire. A significant correlation was found between RAI and fires in both seasons. Additionally, we observed that high occurrences of fire events and burning areas were more explained by RAI, VHI and SPI-3 in dry and wet seasons than by temperature and SPI-1, SPI-6 and SPI-12. We noticed a complex dynamic between fire events, burned area, the environment, and climatic variables. However, the studied indexes proved to be effective tools for detecting drought conditions in the region and their relationship to fire. Keywords: burning, climatic indexes, Paraíba do Sul River Valley.

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“…Com a variabilidade climática e o agravamento das crises hídricas, diversos setores da sociedade, como as atividades agropecuárias e industriais, geração de energia, são prejudicadas, resultando em riscos para o meio ambiente, a saúde humana e a queda da qualidade de vida (Brasiliense et al, 2020;Mendes, 2022;Schilling et al, 2020). O Sul do Brasil é a região mais vulnerável aos desastres desencadeados por chuvas extremas, em destaque às regiões metropolitanas com alto desenvolvimento econômico e alta densidade populacional urbana (Marengo et al, 2021).…”

Section: Introductionunclassified

Distribuição pluviométrica do município de Londrina/PR: análise do comportamento, balanço hídrico, probabilidade e tempo de retorno

Rocha

Santos²

2022

Rev. Bras. Geog. Fis.

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This study aimed to verify the historical distribution of rain in Londrina/PR for the period 1976 to 2020 for a better understanding of water availability. Thus, were used descriptive statistical analysis (e.g., mean, minimum, maximum, median, and others), Standardized Precipitation Index (SPI), Thornthwaite's Simplified and Climatological Water Balance, Probability, and Return Period by the Kimbal method. According to the analyzed historical series, it was found that Londrina has an average total rainfall of 1658.4 mm/year. In turn, the middle period with the highest concentration of rain occurs between October and February, with January having the highest rainfall magnitude of 550.7 mm in 2005, with a probability of occurrence of 2%. It is noteworthy that 1980 had the highest precipitation value for the historical series, with an average total of 2636.3 mm. However, 1985 and 2020 had the lowest average annual rainfall, with 1058 and 1090 mm, respectively. It was still possible to prove that, in general, regular rainy events are predominant, with SPI oscillating between +1.0 and -1.0. Knowing that rainfall is one of the most critical factors for defining the climate of a region, the data analyzed here should support the creation of strategies aimed at planning environmental and socioeconomic activities to assist in the management and more efficient use of water resources.

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Air Temperature and Precipitation Climatologies over Paraíba Sul River Basin, Southeast Brazil

Cited by 7 publications

References 4 publications

Hydrological and Precipitation Extremes and Trends over the Paraiba do Sul River Basin, Brazil

Hydrological and Precipitation Extremes and Trends over the Paraiba do Sul River Basin, Brazil

The influence of climate parameters on fires in the Paraíba do Sul River valley, southeast Brazil

Distribuição pluviométrica do município de Londrina/PR: análise do comportamento, balanço hídrico, probabilidade e tempo de retorno

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