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• W3156285008 abstract "Dry spell studies are of vital importance for agricultural planning and water management. This study characterized dry spells in the state of Rio de Janeiro (SRJ) - southeastern Brazil - based on statistical tests, multivariate analysis and spatial distribution. Daily rainfall data from 1995 to 2017 were obtained from 86 rainfall stations located in the SRJ and neighbouring states. The data were submitted to quality analysis and gap filling of data using the simple linear regression method. The start of a dry spell was considered after three consecutive days with rainfall < 1 mm during the rainy season (November to March). A dry spell was considered the period with at least three consecutive dry days (CDD) and is divided in four classes of dry spells - Class A (3 - 6 days), B (7-10 days), C (11-14 days) and D (15 days or more) – were established for the SRJ. The Shapiro-Wilk (SW), Anderson-Darling (AD), Kolmogorov-Smirnov (KS), Jarque-Bera (JB) and Bartlett (B) tests were also applied to the time series to validate data. The SW (83.72%), AD (74.42%), KS (55.81%) and JB (80.23%) tests indicated non-normality of the data. The classes of dry spells registered different frequencies of occurrence, with Class A (70.03%), B (17.98%), C (6.08%) and D (5.91%). Spatially, there was a high variability of dry spells in the south of the state with the shortest prolonged dry spells, while in the north dry spells are usually longer, with emphasis on February and March. Principal Component Analysis (PCA) was applied to eight variables for Class A (most frequent), and identified latitude, longitude and, particularly elevation, as variables that influence the spatial distribution of dry spells, with highlights for the summer (December and January) season. The high spatial-temporal variability of dry spells in Rio de Janeiro is influenced by multi-scale meteorological systems, with an emphasis on frontal systems and physiographic factors. The applied methodology and presented results can be used to improve public policies regarding water management and mitigate the effects of droughts assuring the quantity and quality of water resources in the development of the SRJ." @default.
• W3156285008 created "2021-04-26" @default.
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• W3156285008 date "2021-08-01" @default.
• W3156285008 modified "2023-10-18" @default.
• W3156285008 title "Spatiotemporal variation of dry spells in the State of Rio de Janeiro: Geospatialization and multivariate analysis" @default.
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• W3156285008 doi "https://doi.org/10.1016/j.atmosres.2021.105612" @default.
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