Neusa Maria Paes Leme

ATMOSPHERIC ANALYSIS OF THE EVENTS SECONDARY EFFECT OF ANTARCTIC OZONE HOLE OVER THE SOUTH OF BRAZIL IN 2012. PART 1: IDENTIFICATION OF THE EVENTS AND ANALYSIS OF DYNAMIC IN THE STRATOSPHERE

In this study were identified events of Influence of the Antarctic ozone hole over southern Brazil in the year 2012. For this, we analyzed the daily average data of total ozone column obtained through Brewer Spectrophotometer, installed in the southern Space Observatory-OESCRSINPE-MCTI (29.4° S; 53.8°; 488 m) and by satellite instruments Total Ozone Mapping Spectrometer (TOMS) and Ozone Monitoring Instrument (OMI), seeking days of falls in the ozone content. For these days, we analyzed potential vorticity maps made using Reanalysis data provided by NCEPNCAR and retroactive trajectories made through the Hysplit model of NOAA, in order to verify the origin of the polar air mass poor in ozone. In addition, it was also conducted a complementary analysis through the images of the ozone content of the OMI satellite, verifying the performance of the Antarctic Ozone Hole in polar regions and its connection with the Southern Brazil. The methodology used was shown to be effective in the identification of 2 events of side effect of the Antarctic ozone hole over the South of Brazil, which showed a fall of 12.1 ± 2.3 average in the ozone content.

ATMOSPHERIC ANALYSIS OF THE EVENTS SECONDARY EFFECT OF ANTARCTIC OZONE HOLE OVER THE SOUTH OF BRAZIL IN 2012. PART 2: SYNOPTIC VERIFICATION OF THE TROPOSPHERE DURING THE EVENTS

In this work, it was verified the synoptic condition in the troposphere of the two events of the Influence of the Antarctic Ozone Hole that occurred over southern Brazil in the year 2012. Both events showed average drop of the 12.1 ± 2.3 in the ozone content in relation to their monthly climatological averages obtained through the data of the Brewer Spectrophotometer MKIII 167 installed on the southern Space Observatory-OESCRSINPE-MCTI and instrument of OMI satellite from NASA. Through wind maps at 250 hPa and 500 hPa and Omega in sea level pressure and thickness between 1000 and 500 hPa in addition to GOES 12 satellite images enhanced infrared, it was observed that the synoptic troposferica condition associated with passage of a wide area of atmospheric stability, without significant cloud cover, related to the remoteness of the subtropical jet stream to the Atlantic Ocean, superimposed by a large high-pressure systems after a few days of the passage of a frontal system stationary, favored the stratospheric transport causing such falls, arriving in one of the cases the configure Atmospheric blocking condition, suggesting that the more intense is the stable air mass front post, the greater the drop in ozone content.

DESENVOLVIMENTO DE METODOLOGIA PARA VALIDAÇÃO E ANÁLISE DE DADOS DE DIÓXIDO DE ENXOFRE (SO2) ATMOSFÉRICO SOBRE O CONTINENTE SUL-AMERICANO

This work describes the development of a methodology for validating the use of Brewer spectrophotometer for measuring the SO 2 total columns, from adaptations in its original calculation algorithm. The results obtained show the possibility of using Brewer spectrophotometer to measure the total columns of sulfur dioxide, with a gain in data quality, of great help to understand the behavior of this gas in the atmosphere with observations that can be used for model validation and calibration of satellites.