Much larger decrease in stratospheric ozone is observed around earth’s polar regions The ozone hole has exposed the global effects of human activity on the atmosphere, with the polar vortex weakening and temperatures rising Depletion of ozone is due to increase in halocarbons in the atmosphere.
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During winter, temperatures in the vortex usually drop below 195 k, and polar stratospheric clouds form
Chemical reactions on the surfaces of these cloud particles releases chlorine that originated from cfcs into forms that can rapidly destroy ozone.
“when the polar vortex is weak, with higher temperatures and slower winds than usual in the stratosphere, the ozone depletion process is weaker, leading to ozone columns above 220 dobson units, the threshold value used to define the antarctic ozone hole,” they explained. In this study, we examine the spatial and temporal distribution of various pscs types and aim to explore their potential influence on chemical depletion reactions within the stratosphere, thereby complementing existing research on arctic stratospheric ozone depletion. Depletion of the ozone layer is due to strong polar fronts, the presence of polar stratospheric clouds and of chlorofluorocarbons In this article, we will discuss the role of the polar stratospheric cloud in ozone depletion which will be helpful for upsc exam preparation.
A significant decreasing trend of arctic stratospheric ozone has been observed since 2019, with the first reported ozone hole in the arctic stratospheric polar vortex (spv) in 2020, raising. The cold temperatures lead in turn to the formation of clouds, known as polar stratospheric clouds These clouds provide surfaces that promote production of forms of chlorine and bromine.
