@Article{BittencourtBPBSBLP:2018:AnTrSt,
author = "Bittencourt, Gabriela Dornelles and Bresciani, Caroline and
Pinheiro, Damaris Kirsch and Bageston, Jos{\'e} Valentin and
Schuch, Nelson Jorge and Bencherif, Hassan and Leme, Neusa Maria
Paes and Peres, Lucas Vaz",
affiliation = "{Universidade Federal de Santa Maria (UFSM)} and {Universidade
Federal de Santa Maria (UFSM)} and {Universidade Federal de Santa
Maria (UFSM)} and {Instituto Nacional de Pesquisas Espaciais
(INPE)} and {Instituto Nacional de Pesquisas Espaciais (INPE)} and
{University of Reunion Island} and {Instituto Nacional de
Pesquisas Espaciais (INPE)} and {Universidade Federal do Oeste do
Par{\'a}}",
title = "A major event of Antarctic ozone hole influence in southern Brazil
in October 2016: An analysis of tropospheric and stratospheric
dynamics",
journal = "Annales Geophysicae",
year = "2018",
volume = "36",
number = "2",
pages = "415--424",
month = "Mar.",
keywords = "Atmospheric composition and structure (middle atmosphere –
composition and chemistry).",
abstract = "The Antarctic ozone hole is a cyclical phenomenon that occurs
during the austral spring where there is a large decrease in ozone
content in the Antarctic region. Ozone-poor air mass can be
released and leave through the Antarctic ozone hole, thus reaching
midlatitude regions. This phenomenon is known as the secondary
effect of the Antarctic ozone hole. The objective of this study is
to show how tropospheric and stratospheric dynamics behaved during
the occurrence of this event. The ozone-poor air mass began to
operate in the region on 20 October 2016. A reduction of ozone
content of approximately 23 % was observed in relation to the
climatology average recorded between 1992 and 2016. The same air
mass persisted over the region and a drop of 19.8 % ozone content
was observed on 21 October. Evidence of the 2016 event occurred
through daily mean measurements of the total ozone column made
with a surface instrument (Brewer MkIII no. 167 Spectrophotometer)
located at the Southern Space Observatory (29.42\◦ S,
53.87\◦ W) in S{\~a}o Martinho da Serra, Rio Grande do
Sul. Tropospheric dynamic analysis showed a post-frontal high
pressure system on 20 and 21 October 2016, with pressure levels at
sea level and thickness between 1000 and 500 hPa. Horizontal wind
cuts at 250 hPa and omega values at 500 hPa revealed the presence
of subtropical jet streams. When these streams were allied with
positive omega values at 500 hPa and a high pressure system in
southern Brazil and Uruguay, the advance of the ozone-poor air
mass that caused intense reductions in total ozone content could
be explained.",
doi = "10.5194/angeo-36-415-2018",
url = "http://dx.doi.org/10.5194/angeo-36-415-2018",
issn = "0992-7689",
language = "en",
targetfile = "bittencourte_major.pdf",
urlaccessdate = "13 maio 2024"
}