Identification of influential events concerning the Antarctic ozone hole over southern Brazil and the biological effects induced by UVB and UVA radiation in an endemic treefrog species

Schuch, André Passaglia; Santos, Maurício Beux dos; Lipinski, Victor Mendes; Peres, Lucas Vaz; Santos, Caroline Peripolli dos; Cechin, Sônia Zanini; Schuch, Nelson Jorge; Pinheiro, Damaris Kirsch; Loreto, Élgion Lúcio da Silva

doi:10.1016/j.ecoenv.2015.04.029

Cited by 37 publications

(17 citation statements)

References 79 publications

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“…Ozone monitoring through ground-based instruments and comparison with data from satellites for midlatitude regions (Balis et al, 2007;McPeters et al, 1998;Keckhut et al, 2010) is essential because, in these densely populated re-gions, phenomena occur such as the formation of mini ozone holes in the Northern Hemisphere (Semane et al, 2002) and events that influence the Antarctic ozone hole (Farman et al, 1985;Solomon, 1999) in the Southern Hemisphere (Kirchhoff et al, 1996;Perez et al, 1998;De Laat et al, 2010;Pinheiro et al, 2012;Schuch et al, 2015). Ozone content exchange between the stratosphere and the troposphere (Holton et al, 1995;Stohl et al, 2003) occurs in both hemispheres (Škerlak et al, 2014) at midlatitudes.…”

Section: Introductionmentioning

confidence: 99%

Measurements of the total ozone column using a Brewer spectrophotometer and TOMS and OMI satellite instruments over the Southern Space Observatory in Brazil

et al. 2017

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Abstract. This paper presents 23 years of quasi-continuous measurements of the total ozone column (TOC) over the Southern Space Observatory (SSO) in São Martinho da Serra, Brazil (29.26 • S, 53.48 • and 488 m altitude). The TOC was measured by a Brewer spectrometer, and the results are also compared to daily and monthly observations from the TOMS (Total Ozone Mapping Spectrometer) and OMI (Ozone Monitoring Instrument) satellite instruments. Analyses of the main interannual modes of variability computed using the wavelet transform method were performed. A favorable agreement between the Brewer spectrophotometer and satellite datasets was found. The seasonal TOC variation is dominated by an annual cycle, with a minimum of approximately 260 DU in April and a maximum of approximately 295 DU in September. The wavelet analysis applied in the SSO TOC anomaly time series revealed that the Quasi-Biennial Oscillation (QBO) modulation was the main mode of interannual variability. The comparison between the SSO TOC anomaly time series with the QBO index revealed that the two are in opposite phases.

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Section: Introductionmentioning

confidence: 99%

Measurements of the total ozone column using a Brewer spectrophotometer and TOMS and OMI satellite instruments over the Southern Space Observatory in Brazil

et al. 2017

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“…After identifying the possible days of influence of the AOH over the region of study, the analysis of isentropic surfaces was conducted, where absolute potential vorticity (APV) fields were made. For the analysis of the stratospheric dynamics, we used reanalysis data available on the Era-G. D. Bittencourt et al: Investigation of the behavior of the atmospheric dynamics Interim/ECMWF platform, and the APV fields were analyzed on isentropic surfaces for the potential temperature levels of 600 and 700 K. PV was used in previous studies that correlated PV with chemical constituents such as ozone, water vapor, and nitrous oxide on isentropic surfaces (adiabatic surfaces where the potential temperature remains constant) in the lower troposphere (Schoeberl, 1989).…”

Section: Identification Of Aoh Influence Eventsmentioning

confidence: 99%

“…Studies by Guarnieri et al (2004) have shown that reductions of up to 1 % in total ozone content in southern Brazil cause an average 1.2 % increase in surface ultraviolet radiation. In addition, increased ozone-related ultraviolet radiation may also affect aquatic and terrestrial systems, helping to explain the decline in amphibian species associated with genetic malformations caused by increased radiation levels received (Schuch et al, 2015). However, their effects can affect regions of middle and low latitudes, causing temporary decreases in the total columns of ozone.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the behavior of the atmospheric dynamics during occurrences of the ozone hole's secondary effect in southern Brazil

et al. 2019

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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.

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“…Days of low TOC values might not have had low SCO values and vice versa. Low TOC and SCO days were determined as days when the respective values were below 1.5 SD from the mean as determined in the climatology analyses (Schuch et al, 2015). We then used the MIMOSA-CHIM model to identify whether the origin of ozone-poor air masses was from the polar region.…”

Section: Low-ozone Daysmentioning

confidence: 99%

Spring and summer time ozone and solar ultraviolet radiation variations over Cape Point, South Africa

et al. 2019

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The correlation between solar ultraviolet radiation (UV) and atmospheric ozone is well understood. Decreased stratospheric ozone levels which led to increased solar UV radiation levels at the surface have been recorded. These increased levels of solar UV radiation have potential negative impacts on public health. This study was done to determine whether the break-up of the Antarctic ozone hole has an impact on stratospheric columnar ozone (SCO) and resulting ambient solar UV-B radiation levels at Cape Point, South Africa, over 2007-2016. We investigated the correlations between UV index, calculated from ground-based solar UV-B radiation measurements and satellite-retrieved column ozone data. The strongest anti-correlation on clear-sky days was found at solar zenith angle 25 • with exponential fit R 2 values of 0.45 and 0.53 for total ozone column and SCO, respectively. An average radiation amplification factor of 0.59 across all SZAs was calculated for clear-sky days. The MIMOSA-CHIM model showed that the polar vortex had a limited effect on ozone levels. Tropical air masses more frequently affect the study site, and this requires further investigation.

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Identification of influential events concerning the Antarctic ozone hole over southern Brazil and the biological effects induced by UVB and UVA radiation in an endemic treefrog species

Cited by 37 publications

References 79 publications

Measurements of the total ozone column using a Brewer spectrophotometer and TOMS and OMI satellite instruments over the Southern Space Observatory in Brazil

Measurements of the total ozone column using a Brewer spectrophotometer and TOMS and OMI satellite instruments over the Southern Space Observatory in Brazil

Investigation of the behavior of the atmospheric dynamics during occurrences of the ozone hole's secondary effect in southern Brazil

Spring and summer time ozone and solar ultraviolet radiation variations over Cape Point, South Africa

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