[en] Data taken during the 1987 Antarctic Airborne Ozone Experiment based in Punta Arenas, Chile, are used to show that from mid-August until the end of the mission in late September there was a high latitude ozone loss outside the Antarctic ozone hole. Therefore, not only is the geographic extent of the ozone loss larger than that generally identified as chemically perturbed, but ozone is lost earlier in the year than previously reported. These results, when compared with long-term temporal trends of column ozone, indicate a possible anthropogenic component for this loss. 30 refs., 4 figs

[en] The effect of O₂ and O₃ bubbling on decolourization of methylene blue by pulsed corona discharges in water was studied. The pulsed corona discharges were produced by charging an 80 pF capacitor with a 40 kV DC source, through a 100 MΩ resistor, and discharging it into a needle-plate type reactor at 60 Hz through a rotating spark gap switch. A 20 ml sample of 13.25 mg l^-1 methylene blue in distilled water was decolourized in 120 min. Bubbling O₂ at 10 ml min^-1 through the discharge region reduced the decolourization time to 25 min. Bubbling O₂ containing 1500 μmol O₃ l^-1 at 10 ml min^-1 reduced the decolourization time to 8 min. The O₃ was produced by fractionating input energy between a water treatment reactor and a O₃ generator, i.e. no additional energy was consumed for O₃ production. Under the same experimental conditions methylene blue solution in tap water was decolourized in >210 min by corona discharge in solution, in 30 min by corona discharge with O₂ bubbling, and in 11 min by corona discharge with bubbling of O₂ containing 1500 μmol O₃ l^-1

No abstract available

[en] Almost all oxidizers currently used for decontamination application contain metal constituents that generate secondary waste. So, we have developed a chemical decontamination method with the aim of reducing the amount of secondary waste without reducing the decontamination effect. Ozone is the most promising oxidizer for decontamination applications because it is the strongest oxidizer. In the present work, we focused on high-concentration ozone gas generated from high-performance ozonizer. We investigated the applicability of ozone solution formed by high-concentration gas as decontamination agent and obtained good results, which are reported in this paper

[en] Since the mid 1970s, the ozone layer over Antarctica has experienced massive destruction during every spring. In this article, we will consider the atmosphere, and what ozone and the ozone layer actually are. We explore the chemistry responsible for the ozone destruction, and learn about why conditions favour ozone destruction over Antarctica. For the historical perspective, the events leading up to the discovery of the 'hole' are presented, as well as the response from the international community and the measures taken to protect the ozone layer now and into the future

[en] Published in summary form only

[en] Together with natural changes, both day to day and with season, there is now evident a slow but measurable annual decline in the total amount of ozone in the atmosphere over New Zealand. This longer term decrease is of the order of 5% per decade at New Zealand latitudes and therefore is slowly increasing the mean solar UV intensities that our region experiences. The cause of this change is attributed to the addition of anthropogenic chlorine to the atmosphere and its subsequent catalytic reaction with ozone. (author). 5 refs., 2 figs

[en] The surface air temperature recorded at Vesuvian Observatory has evidenced a significant 11y cycle related to total ozone variation, which in turns has been coherently linked to sunspot activity. Such a correlation has not been found in the series of Naples (few km apart), where it is masked by the large long-period variations related to the growth of the urban heat island. Aphysical involving variations in sunspot activity, ozone layer and surface air temperature has been proposed

[en] In the report the results of study of ozon content in atmosphere, intensity of electric field and influence on its Earth seismic activity, rock shocks and other anomalous natural phenomena are cited

[en] A set of physical and chemical processes occurring in a microwave stratospheric discharge of nanosecond duration is discussed in connection with the effect they may have locally on the ozone layer in the artificially ionized region (AIR) in the stratosphere. The AIR, to be created at altitudes of 18 - 20 km by the microwave breakdown of air with ground-produced powerful electromagnetic wave beams, is planned for use in the natural physical experiment aimed at active monitoring of the ozone layer (its internal state and a set of plasma-chemical and photochemical processes) by controllably generating a considerable amount of ozone in the stratosphere. Results of relevant theoretical studies are presented, as are those of a large series of laboratory experiments performed under conditions similar to those prevailing in the stratosphere. Discharge regimes securing the efficient growth of ozone concentration are identified and studied in detail. It is demonstrated that such a stratospheric ozonizer is about as efficient as the best ground-based ozonizers used at present. For typical stratospheric conditions (low pressures and temperatures T ∼ 200 - 220 K), it is shown that the intense generation of ozone in a microwave breakdown effected by groups of short nanosecond pulses does not virtually increase the density of nitrogen oxides - gases that play a vital role in catalytic ozone-decomposing reactions. The possibility of effectively producing ozone in prebreakdown electric fields is established experimentally. It is demonstrated that due to its long lifetime, ozone produced locally at altitudes of 18 - 20 km may spread widely under the action of winds and turbulent diffusion, thus leading to an additional - artificial - ozonization of the stratosphere. (reviews of topical problems)