Variabilidade climática sazonal e anual da chuva e veranicos no Estado do Paraná

Minuzzi, Rosandro Boligon; Caramori, Paulo Henrique

doi:10.1590/s0034-737x2011000500009

Cited by 17 publications

(11 citation statements)

References 11 publications

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“…The municipalities Palmas, Ponta Grossa and Umuarama had the lowest increasing/decreasing rates of annual precipitation, with amounts lower than 1 mm. The results found in this study differ from those found by Minuzzi and Caramori (2011), who verified a trend of precipitation increase in the state of Paraná when they analyzed data from 21 hydrological stations. However, more recent research by Silva et al (2015) corroborate the results identified in this study, since these authors verified trends of reduction in the annual rainfall in Paraná, mainly in the central and northern regions of the Paraná state, with increasing rainfall behavior only in the coast and southwest of the state.…”

Section: Precipitation Trend Analysis In Paranácontrasting

confidence: 99%

“…On the other hand, studies on spatial and temporal variability of precipitation are more frequent (Silva and Guetter, 2003;Minuzzi and Caramori, 2011;Silva et al, 2015), thus, an analysis at the state level, encompassing a consistent historical database of ET can help to identify possible changes in the ET, improving activities that are directly affected by it, such as the irrigated agriculture. This understanding was also supported by Xu et al (2006), who stated that ET data when regionalized become valuable information in the planning of the use of water resources, considering the importance of this variable as the driving force of the hydrological cycle.…”

Section: Introductionmentioning

confidence: 99%

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Space-time variability of evapotranspiration and precipitation in the State of Paraná, Brazil

Santos¹,

José²,

Alves³

et al. 2017

Rev. ambiente água

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Long-term changes in important weather variables such as evapotranspiration (ET) and precipitation are expected as a response to climate change. These changes may require adjustments to current strategies of planning and management of water resources. The objective of this work was to conduct a spatiotemporal characterization of evapotranspiration in the State of Paraná, Brazil, including in this approach a temporal trend analysis. A similar analysis was also conducted for precipitation. Thus, the historical data from 33 weather stations were analyzed. The spatial distribution of the data was carried out by geostatistical techniques (ordinary kriging) and the trend analysis by the tests Mann-Kendall and Sen. According to the results, evapotranspiration increases from the coast to the interior of the state, with the highest values in the northeast and northwest regions, reaching levels of about 1200 mm yr -1 . The temporal variability of the ET presented a significant upward trend in 12% of the locations, with increases from 2.5 to 7.0 mm yr -1 . Precipitation was higher in the coastal and south-central regions and the lowest amounts were identified in the northeast and northwest regions. The precipitation trend analysis indicated a significant downward trend in precipitation volume of five locations. The evapotranspiration and precipitation showed, in general, no statistically significant trends in most of the stations analyzed; however, the upward trends for ET and downward trends for precipitation indicate local changes in the State of Paraná. Variabilidade espaço-temporal da evapotranspiração e precipitação para o Estado do Paraná RESUMOComo reflexos das alterações advindas das mudanças climáticas, espera-se modificações de longo prazo em importantes variáveis meteorológicas, tais como evapotranspiração (ET) e precipitação, as quais podem demandar ajustes nas atuais estratégias de planejamento e gestão dos recursos hídricos. Neste estudo, objetivou-se realizar a caracterização espaço-temporal da variável evapotranspiração para o estado do Paraná, associando a essa abordagem uma análise de tendência temporal. Complementarmente, foi realizada análise similar para a precipitação. Para este propósito analisou-se uma série histórica de dados que compreende ao período de 1980-2010, obtidos em 33 estações meteorológicas. A espacialização dos dados foi feita a partir de técnicas geoestatísticas (krigagem ordinária) e as análises de tendências com os testes de Mann-Kendall e Sen. Os resultados indicaram que a evapotranspiração aumenta do litoral para o interior do estado, com os maiores valores ocorrendo nas regiões nordeste e noroeste, atingindo patamares da ordem de 1200 mm ano -1 . Quanto a variabilidade temporal da ET, notou-se tendência significativa de aumento em 12% das localidades estudadas, com a magnitude destas tendências variando entre 2,5 a 7,0 mm ano -1 . A precipitação foi maior nas regiões litorâneas e centro-sul e as menores alturas foram identificadas nas regiões nordeste e noroeste. A anál...

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Section: Precipitation Trend Analysis In Paranácontrasting

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Space-time variability of evapotranspiration and precipitation in the State of Paraná, Brazil

Santos¹,

José²,

Alves³

et al. 2017

Rev. ambiente água

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“…Engenharia Agrícola, Jaboticabal, v.39, n.4, p.466-475, jul./aug. 2019 Some studies found significant trends in rainfall series in the south of Brazil (Minuzzi & Caramori, 2011;Pinheiro et al, 2013;Haylock et al, 2006), whereas other studies found no significant trends (Silva et al, 2015;Denski & Back, 2015). This apparent discrepancy is in part due to different time periods covered in these data series and different methodologies.…”

Section: Resultsmentioning

confidence: 99%

Spatial, Seasonal, and Temporal Variations in Rainfall Aggressiveness in the South of Brazil

Back¹,

Gonçalves

Fan

2019

Eng. Agríc.

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The objective of this study is to evaluate spatial and temporal variations in rainfall aggressiveness in southern Brazil. A total of 181 rain gauge stations located in southern Brazil with rainfall time series from 1976 to 2015 were used. Seasonal and annual rainfall aggressiveness values measured according to the Modified Fournier Index (MFI) were analyzed. The trends in the data series were evaluated using the Mann-Kendall test at a level of significance of 5%. Maps on spatial and seasonal variations in rainfall aggressiveness were prepared. The percentage of rain gauge stations with significant decreasing trends, significant increasing trends, and no significant trends in rainfall aggressiveness between years was 3.3%, 7.7%, and 89.0%, respectively. Moreover, 90% of stations had no significant trends between seasons. There were seasonal differences in rainfall aggressiveness between the three southern states in Brazil caused by rainfall factors. Rainfall aggressiveness was comparatively higher in the west of Santa Catarina and southwest of Paraná due to the rains originating from the mesoscale convective systems predominant in autumn, and in the north coast of Santa Catarina and east coast of Paraná due to convective and orographic precipitations predominant in the summer.

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“…Several studies of precipitation trend analysis were developed in Brazil using non-parametric statistical tests, which obtained results of absence of trend (Salviano et al, 2016;Noronha et al, 2016;Sanches et al, 2013), trend of increase (Uliana et al 2015;Costa et al;2015;Pinheiro et al, 2013;Minuzzi and Caramori, 2011;Groppo et al, 2001;Back, 2001) or even decreasing trends and/or different trends of increase and decrease in the same work, according to the region under study (Raimundo et al, 2014;Blain, 2010;Lima et al, 2011), which justifies the study of precipitation trends on a regional scale.…”

Section: Introductionmentioning

confidence: 99%

Trends in daily precipitation in highlands region of Santa Catarina, southern Brazil

Sá¹,

Moura²,

Padilha³

et al. 2018

Rev. ambiente água

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This study evaluates the occurrence of trends in time series of precipitation in the highlands region of Santa Catarina, Southern Brazil. Daily precipitation data of three weather stations at Lages, São Joaquim and Campos Novos were used to evaluate rainfall trends. The trends were analyzed through the Seasonal Mann Kendall test, to include occurrence of maximum annual 1-day precipitation (RX1), maximum annual consecutive 2-day precipitation (RX2) and maximum annual consecutive 3-day precipitation (RX3) and evaluation of Rainfall Anomaly Index (RAI). Trends were identified in two of three weather stations investigated. Positive precipitation trends were found in the spring and winter for Lages, and in the spring and summer for São Joaquim. Also, there is a trend of increase in the RX1, RX2 and RX3 frequencies and an increase in positive anomalies in the last decade for these stations. There are no statistically significant trends in the precipitation of Campos Novos, which may be associated with the short series of available data for the analysis. The occurrence of El Niño phenomenon with moderate to strong intensity was usually associated with the occurrence of positive precipitation anomalies and the La Niña phenomenon was related to the occurrence of negative anomalies. However, the influence of La Niña in the periods of negative anomaly has been reduced since the beginning of the 21st century.Keywords: anomaly, rainfall, Mann-Kendall. Tendências na precipitação diária da região serrana de SantaCatarina, sul do Brasil RESUMOEste estudo tem como objetivo avaliar a ocorrência de tendências em séries temporais de precipitação na região serrana de Santa Catarina, no sul do Brasil. As tendências foram analisadas através do teste Sazonal de Mann Kendall, frequências da precipitação máxima de 1 dia (RX1), precipitação máxima consecutiva de 2 dias (RX2) e precipitação máxima consecutiva de 3 dias (RX3) e avaliação do Índice de Anomalia de Chuva (RAI). Tendências foram identificadas em duas das três estações meteorológicas investigadas. As tendências 2 Eder Alexandre Schatz Sá et al.Rev. Ambient. Água vol. 13 n. 1, e2149 -Taubaté 2018 positivas de precipitação foram encontradas na primavera e no inverno para Lages e na primavera e verão para São Joaquim. Além disso, há uma tendência de aumento das RX1, RX2 e RX3 e aumento de anomalias positivas na última década para essas estações. Não há tendências estatisticamente significativas na precipitação de Campos Novos, o que pode estar associado à curta série de dados disponíveis para a análise. A ocorrência do fenômeno de El Niño com intensidade moderada a forte geralmente foi associada à ocorrência de anomalias de precipitação positivas e o fenômeno de La Niña estava relacionado à ocorrência de anomalias negativas. Embora, observe-se que a influência de La Niña nos períodos de anomalia negativa foi reduzida desde o início do século XXI.Palavras-chave: anomalia, chuva, Mann-Kendall.

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Variabilidade climática sazonal e anual da chuva e veranicos no Estado do Paraná

Cited by 17 publications

References 11 publications

Space-time variability of evapotranspiration and precipitation in the State of Paraná, Brazil

Space-time variability of evapotranspiration and precipitation in the State of Paraná, Brazil

Spatial, Seasonal, and Temporal Variations in Rainfall Aggressiveness in the South of Brazil

Trends in daily precipitation in highlands region of Santa Catarina, southern Brazil

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