Abstract

CORREA ORTIZ, Luis Carlos; OCAMPO LOPEZ, Olga Lucía  and  ALBA CASTRO, Mauricio Fernando. Temperature and precipitation trend analysis for the department of Caldas (Colombia), using wavelets. Cienc. Ing. Neogranad. [online]. 2021, vol.31, n.1, pp.37-52.  Epub July 23, 2021. ISSN 0124-8170.  https://doi.org/10.18359/rcin.4900.

Climate change, understood as an alteration of the climate, due or not to human activity, added to climate variability, is a primary area of study at this time. This study was carried out with the objective of generating information on trends of the temperature and precipitation variables for the department of Caldas, Colombia, using the wavelets analysis technique. For this purpose, the Ideam stations, located in the territory, were selected for the periods 1971-2010, in the case of precipitation; and for the period 1981-2010, for temperature. The stations record data daily, which was transformed into monthly data, their trend was calculated by multi resolution analysis (MRA), selecting the Daubechies wavelet (dB5) with six levels of degradation. The analysis shows slow and increasing trends in precipitation for the fifteen stations analyzed. A similar result was obtained for minimum temperature. While, for maximum temperature, slow decreasing trends were recorded in one station. For comprehensive climate change management plans, it is recommended to monitor these trends, if possible with longer historical series, to identify signs of change and possible effects on the regional climate.

Keywords : trend analysis; climate change; precipitation; temperature; wavelets.

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