Radiation and Ozone: Catalysts for Advancing International Atmospheric Science Programmes for over Half a Century

Ohring, George; Bojkov, Rumen D.; Bolle, H. J.; Hudson, R. D.; Volkert, Hans

doi:10.1016/j.srt.2010.03.004

Cited by 7 publications

(6 citation statements)

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“…Understanding the patterns of both influences has become increasingly important to understand how these events occur and behave. Additionally, there is possibility of a linkage of some meteorological phenomena during events of influence of the Antarctic ozone hole (Ohring et al, 2010). Therefore, the present study aimed to analyze stratospheric and tropospheric dynamics during an extreme event of influence of the Antarctic ozone hole that reached southern Brazil in October 2016.…”

Section: Introductionmentioning

confidence: 99%

A major event of Antarctic ozone hole influence in southern Brazil in October 2016: an analysis of tropospheric and stratospheric dynamics

et al. 2018

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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 São 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.

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Section: Introductionmentioning

confidence: 99%

A major event of Antarctic ozone hole influence in southern Brazil in October 2016: an analysis of tropospheric and stratospheric dynamics

et al. 2018

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“…Moreover, the upper troposphere-lower stratosphere (UT-LS) region in southern Brazil seems to be the home of many dynamical processes, such as stratosphere-troposphere exchanges and isentropic transport between the tropical stratosphere reservoir, polar vortex, and middle latitude. Indeed, understanding the patterns of the UT-LS is important in understanding transport and exchange processes and the links with tropospheric meteorology (Ohring et al, 2010).…”

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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“…Group photographs from international gatherings can be regarded as visual datasets, the value of which is much enhanced, if the full names and geographical context (e.g., country of work) of every person are known. Ohring et al (2009, Fig. 1 and Appendix) provided a most illustrative example through the illustrious joint grouping of the IAMAS commissions on Ozone (IOC) and on Radiation (IRC), when 128 persons (including some spouses and even children) met for a joint symposium in Oxford, UK, in the summer of 1959, invited by the atmospheric ozone research pioneer Gordon DOBSON.…”

Section: Introductionmentioning

confidence: 99%

Putting faces to names: Snapshots of two committee meetings, 95 years apart, emphasize continuous international cooperation in the atmospheric sciences

Volkert¹

2017

Adv. Atmos. Sci.

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Radiation and Ozone: Catalysts for Advancing International Atmospheric Science Programmes for over Half a Century

Cited by 7 publications

References 0 publications

A major event of Antarctic ozone hole influence in southern Brazil in October 2016: an analysis of tropospheric and stratospheric dynamics

A major event of Antarctic ozone hole influence in southern Brazil in October 2016: an analysis of tropospheric and stratospheric dynamics

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

Putting faces to names: Snapshots of two committee meetings, 95 years apart, emphasize continuous international cooperation in the atmospheric sciences

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