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Daily rainfall intensity and temporal trends in eastern Paraná state – Brazil
Urban Climate ( IF 6.4 ) Pub Date : 2022-01-24 , DOI: 10.1016/j.uclim.2022.101090
Paulo Miguel de Bodas Terassi , Antonio Carlos da Silva Oscar-Júnior , Emerson Galvani , José Francisco de Oliveira-Júnior , Bruno Serafini Sobral , Vitor Hugo Rosa Biffi , Givanildo de Gois

The present study aims to analyze the intensity of daily extreme rainfall and trends for precipitation in Castro, Curitiba and Paranaguá stations, located in the state of Paraná, Brazil. Historical series of rainfall registered by the Brazilian National Institute of Meteorology were used considering the period from 1976 to 2015. The Mann-Kendall and Pettitt statistical tests were applied to identify trends and ruptures in historical rainfall series. Other indicators of trends in rainfall and temperature were calculated using the RClimDex software, developed by the Canadian Meteorological System. The classification of cumulative daily rainfall in 24 h with the application of the quantile technique was defined as a standard for percentiles. The months of January, February and December presented greater occurrence frequency of rainfall equal to or greater than 95% and 99% of the quantiles for all locations. The comparative analysis showed that Paranaguá station has the largest accumulated values of rainfall in 24 h during the rainiest months, between September and April, while Castro and Curitiba stations recorded the highest daily totals between May and August. Increasing daily precipitation totals were identified in all quantile's classes with statistical significance only in Curitiba and Paranaguá station, which is attributed to greater urban densities and its direct impacts over daily rainfall totals. Significant trends for increased rainfall were observed, especially in Curitiba, a condition that is associated with the expressive and also significant increase in climate indicators of air temperature.



中文翻译:

巴西巴拉那州东部的每日降雨强度和时间趋势

本研究旨在分析位于巴西巴拉那州的卡斯特罗、库里提巴和巴拉那瓜站的每日极端降雨强度和降水趋势。考虑到 1976 年至 2015 年期间,使用了巴西国家气象研究所记录的历史降雨系列。应用 Mann-Kendall 和 Pettitt 统计检验来确定历史降雨系列的趋势和破裂。使用加拿大气象系统开发的 RClimDex 软件计算了降雨和温度趋势的其他指标。应用分位数技术对 24 小时内日累积降雨量的分类被定义为百分位数的标准。一月的几个月,2 月和 12 月出现更大的降雨发生频率等于或大于所有位置的分位数的 95% 和 99%。比较分析表明,Paranaguá 站在 9 月至 4 月的降雨量最多的月份中 24 小时累积降雨量最大,而 Castro 和库里提巴站在 5 月至 8 月的每日总降雨量最高。仅在库里提巴和巴拉那瓜站,在所有分位数类别中都发现了增加的每日降水总量,这归因于更高的城市密度及其对每日降雨总量的直接影响。观察到降雨量增加的显着趋势,特别是在库里提巴,

更新日期:2022-01-24
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