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1 - Instituto de Biologia da UFRJ

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and New Zealand (Brinksma et al., 1998). Comparing the<br />

events analyzed with the events observed for Pinheiro et al.<br />

(2011) over South of Brazil in 2008 and 2009, the events<br />

for 2010 and 2011 had a less intense <strong>de</strong>crease of 6.3 ± 2.1%<br />

compared to 9,7 ± 3,3 % from 2008 and 2009.<br />

Conclusion<br />

Days with <strong>de</strong>crease of ozone total column at Southern Space<br />

Observatory for 2010 and 2011 were analyzed. A total of<br />

seven events of influence of the Antarctic Ozone Hole over<br />

South of Brazil were <strong>de</strong>tected in these period, with 4 events<br />

a<br />

b<br />

c<br />

Figure 1. Event of the Antarctic Ozone Hole influence over SSO occurred at October, 22 th , 2010. a) Maps showing of the increase of the absolute potential<br />

vorticity at the level of 620 K from 21 th to 22 th , b) backward trajectory generated with the HYSPLIT mo<strong>de</strong>l showing the polar origin of the air mass over SSO and<br />

c) image generated using <strong>da</strong>ta from OMI for October, 20 th showing a filament of poor ozone air mass reaching South America.<br />

36 | Annual Activity Report 2011

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