Identification of pluriannual periodicities in series of drought indexes and its relationship with macroclimatic indicators

L VICARIO; E DIAZ; GARCIA M; A RODRIGUEZ

Environmental and Sustainability Indicators

Elsevier

Lugar: amsterdam; Año: 2019 vol. 3 p. 1 - 5

2665-9727

In Latin America, drought studies generally develop on climatic or hydrologicalapproach and there are few studies available on the relationship between different kindof droughts and macroclimatic processes. The main objective of this paper was torelate the times series of droughts indexes to relevant macroclimatic indicators inCentral Region of Argentina. For that, the Fourier analysis was used to identify thepluri- annual periodicities of macroclimatic indicators and representative indexes ofhydrometeorological and hydrological droughts. The indexes were calculated with timeseries of precipitation and flow data of stations located in Carcarañá River basin.According to dominant frequencies, series with Fourier band-pass filters were filtered.Full and filtered series of indexes and indicators were compared through thecorrelation coefficient, for to identify and compare the time scale of the processesinvolved. A significant relationship in pluriannual