Pattern analysis of seven total ozone column measuring stations in the center, southern of South America and Antarctica.

G. CARBAJAL; H. ESTEVEZ; E. LUCCINI; F. ORTE; H. OCHOA; E. WOLFRAM; M. BARLASINA; L. CONDORI; F. NOLLAS

Daejeon

Simposio; Quadrennial Ozone Symposium of the International Ozone Commission; 2021

The objective of this work is to analyze the patterns of the series available data from six measurement stations in the center, south of South America and Antarctica. The six stations are: 3 are center and sothern of South America; Buenos Aires (BsAs, latitude: 34 ° S), Comodoro Rivadavia (CRV, latitude: 45 °), Ushuaia (USH, latitude: 54 °) and 3 are Antarctic; Marambio (MBI, latitude: 64 °), San Martín (SMT, latitude: 68 °) and Belgrano (BEL, latitude: 77 °). Data are obtained from WOULC, from four Dobson and two Brewers spectrophotometers. The data used are obtained through observations direct sun and zenith measurements, due to the lack of data. Those data that are not representative are eliminated through the variance method. The methodology is through the decompositions of each one of the series, for the identification of patterns, within their seasonality and trends, time series have approximately one constant mean and variance, therefore additive decomposition is used. The results show in the Buenos Aires and Comodoro stations, a maracad and well-defined seasonality and transport activity is clearly observed, minimum in the summer season, increasing until reaching a maximum at the end of winter and decrease at the beginning of spring, while Ushuia shows seasonality but with great variability, especially in the ozone hole season. In the Antarctic stations, a reduction is observed at the beginning of spring, but the San Martín and Marambio stations with relative variability. The result of the time series trends will be presented at the event, as we are still discussing these results.