Investigation of the behavior of the atmospheric dynamics during occurrences of the ozone hole's secondary effect in southern Brazil
-
Published:2019-11-21
Issue:6
Volume:37
Page:1049-1061
-
ISSN:1432-0576
-
Container-title:Annales Geophysicae
-
language:en
-
Short-container-title:Ann. Geophys.
Author:
Bittencourt Gabriela Dornelles, Pinheiro Damaris Kirsch, Bageston José Valentin, Bencherif Hassan, Steffenel Luis Angelo, Vaz Peres LucasORCID
Abstract
Abstract. The Antarctic ozone hole (AOH) directly influences the Antarctic
region, where its levels can reach values below 220 DU. The temporary
depletion of ozone in Antarctica generally occurs between the beginning and
middle of August, during the austral spring, and extends to November, when a
temporary reduction in ozone content is observed in a large region over the
Antarctic continent. However, masses of ozone-depleted air can break away
from the ozone hole and reach mid-latitude regions in a phenomenon known
as the secondary effect of the Antarctic ozone hole. The objective of this
paper is to show how atmospheric dynamics behave during the occurrence of
this type of event, especially in mid-latitude regions, such as southern
Brazil, over a 12-year observation period. For the analysis and
identification of the events of influence of the AOH on the southern region
of Brazil, data from the total ozone column were used from ground-based and
satellite experiments, the Brewer Spectrophotometer (MkIII no. 167), and the
Ozone Monitoring Instrument (OMI) on the Aura satellite. For the analysis of
the stratospheric and tropospheric fields, the ECMWF reanalysis products
were used. Thus, 37 events of influence of the AOH that reached the southern
region of Brazil were identified for the study period (2006–2017), where the
events showed that in approximately 70 % of the cases they occurred after
the passage of frontal systems and/or atmospheric blocks over southern
Brazil. In addition, the statistical analysis showed a strong influence of
the jet stream on mid-latitude regions during the events. Among the 37
identified events, 92 % occurred in the presence of the subtropical and/or
polar jet stream over the region of study, possibly explaining the exchange
of air masses of ozone deficient in the upper troposphere–lower
stratosphere (UT–LS) region.
Publisher
Copernicus GmbH
Subject
Space and Planetary Science,Earth and Planetary Sciences (miscellaneous),Atmospheric Science,Geology,Astronomy and Astrophysics
Reference51 articles.
1. Antón, M., López, M., Vilaplana, J. M., Kroon, M., Mcpeters, R.,
Bañón, M., and Serrano, A.: Validation of OMI-TOMS and OMI-DOAS
total ozone column using five Brewer spectroradiometers at the Iberian
Peninsula, J. Geophys. Res.-Atmos., 114, D14307, https://doi.org/10.1029/2009JD012003,
2009. 2. Bencherif, H., Portafaix, T., Baray, J. L., Morel, B., Baldy, S., Leveau, J.,
Hauchecorne, A., Keckhut, P., Moorgawa, A., Michaelis, M. M., and Diab, R.: LIDAR observations of lower stratospheric aerosols over South Africa linked to large scale transport across the southern subtropical barrier, J. Atmos. Sol.-Terr. Phy., 65, 707–715, https://doi.org/10.1016/S1364-6826(03)00006-3, 2003. 3. Bencherif, H., El Amraoui, L., Semane, N., Massart, S., Charyulu, D. V.,
Hauchecorne, A., and Peuch, V. H.: Examination of the 2002 major warming in the
southern hemisphere using ground-based and Odin/SMR assimilated data:
stratospheric ozone distributions and tropic/mid-latitude exchange, Can. J.
Phys., 85, 1287–1300, 2007. 4. Bittencourt, G. D., Bresciani, C., Kirsch Pinheiro, D., Bageston, J. V., Schuch, N. J., Bencherif, H., Leme, N. P., and Vaz Peres, L.: A major event of Antarctic ozone hole influence in southern Brazil in October 2016: an analysis of tropospheric and stratospheric dynamics, Ann. Geophys., 36, 415–424, https://doi.org/10.5194/angeo-36-415-2018, 2018. 5. Bresciani, C., Bittencourt, G. D., Bageston, J. V., Pinheiro, D. K., Schuch, N. J., Bencherif, H., Leme, N. P., and Peres, L. V.: Report of a large depletion in the ozone layer over southern Brazil and Uruguay by using multi-instrumental data, Ann. Geophys., 36, 405–413, https://doi.org/10.5194/angeo-36-405-2018, 2018.
Cited by
3 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献
|
|