Depletion of stratospheric ozone in the Southern Hemisphere (SH) during late twentieth century cooled local air temperature, which resulted stronger westerly winds near 60° S and altered SH surface climate. However, Antarctic has been recovering since around 2001 thanks to implementation Montreal Protocol, banned production consumption ozone-depleting substances. Here we show that post-2001 inc...

In order to evaluate the observed high rural ozone levels in the eastern Mediterranean area during summertime, vertical profiles of ozone measured in the period 1994–2008 in the framework of the MOZAIC project (Measurement of Ozone and Water Vapor by Airbus in Service Aircraft) over the eastern Mediterranean basin (Cairo, Tel Aviv, Heraklion, Rhodes, Antalya) were analyzed, focusing in the lowe...

[1] Interannual anomalies in vertical profiles of stratospheric ozone, in both equatorial and extratropical regions, have been shown to exhibit a strong seasonal persistence, namely, extended temporal autocorrelations during certain times of the calendar year. Here we investigate the relationship between this seasonal persistence of equatorial and extratropical ozone anomalies using the SAGE‐co...

Abstract First of all, we have to know that the ozone layer exists in different levels Earth’s atmosphere. After follow-up, it was found equivalent 80% is at altitudes between 16 and 35 kilometres above earth’s surface. At this level provides a good sunscreen shield, believe ozone. It also present ground low concentrations (tropospheric ozone). believed stage polluting part smog over cities mai...

The Montreal Protocol is working. Concentrations of major ozone-depleting substances in the atmosphere are now decreasing, and the decline in total column amounts seen in the 1980s and 1990s at mid-latitudes has not continued. In polar regions, there is much greater natural variability. Each spring, large ozone holes continue to occur in Antarctica and less severe regions of depleted ozone cont...

[1] We examine the impact of assimilating ozone observations from the Tropospheric Emission Spectrometer (TES) on North American surface ozone abundances in the GEOS-Chem model in August 2006. The assimilation reduces the negative bias in the modeled free tropospheric ozone, which enhances the ozone flux into the boundary layer. Surface ozone abundances increased by as much as 9 ppb in western ...

[1] Continuous surface-layer ozone flux measurements over the polar, year-round snowpack at Summit, Greenland, resulted in deposition velocities (vd) that were smaller than most previous assumptions and model inputs. Substantial seasonal differences were seen in the ozone vd behavior. Spring, daytime ozone vd values showed low variability and were consistently 0.01 cm s . During summer, ozone f...

Abstract The improper usage of refrigerants has a drastic impact on the environment, which is contributing to global warming and ozone layer depletion. are being used currently have very high GWP (Global Warming Potential) value that signifies an adverse warming. Refrigerant properties can be enhanced modified by making refrigerant blends. This research uses as measure provides alternative blen...

The climate of the stratosphere is known to be subject to long-term changes induced by anthropogenic emissions of long-lived greenhouse gases (GHGs) as well as by emissions of ozone depleting substances (primarily chlorofluorocarbons, CFCs). Enhanced concentrations of CFCs have led to strong ozone depletion over the last decades. Thanks to the Montreal Protocol and its amendments and adjustment...

[1] Ozonesonde observations from Syowa and the South Pole over more than 40 years are described and intercompared. Observations from the two sites reveal remarkable agreement, supporting and extending the understanding gained from either individually. Both sites exhibit extensive Antarctic ozone losses in a relatively narrow altitude range from about 12 to 24 km in October, and the data are con...