CLASSIFICATION OF MECHANISMS THAT PRODUCE THE ANNUAL MAXIMUM WIND GUST IN RESISTENCIA AND CORRIENTES, ARGENTINA
Claudia Palese, Jorge L. Lassig y Bruno Natalini
Facultad de Ingeniería, Universidad Nacional del Comahue
Faculta de Ingeniería, Universidad Nacional del Nordeste
Manuscript received on April 12th, 2019, on final form on August 13th, 2019.
The aim of this study is to classify the mechanisms that produced the maximum annual gust recorded in the meteorological stations of the airports of Resistencia and Corrientes. Three separation criteria were applied: (i) the convective storms vs. other mechanisms; (ii) the synoptic vs. non-synoptic; and (iii) the convective storms vs. those that were associated with the passage of a cold front. The available data sets were the Daily Registers of the stations from 1968 – 2016. The data series were conditioned to generate a series called superstation. For classification (i) the hourly measured data were inspected; for classification (ii) NCEP/NCAR reanalysis and thermal infrared remote sensing were used; and for classification (iii), the Biplot tool was used in the context of canonical variate analysis to determine the classificatory regions. The results show that the annual maximum gust produced by storms have an occurrence of 96.1% compared to other mechanisms; 93.5% correspond to non-synoptic wind; and 62.3% were classified as convection not associated with the passage of a cold front. It is concluded that Corrientes and Resistencia are not subject to mixed wind climate, that is, the maximum annual gust is due to a simple wind climate corresponding to intense convective activity that produces storms, of which one third was associated with the passage of a cold front and within of this third, one was related to a closed low pressure system located in the north of Argentina.