Has Australia got an ozone layer?
The stratospheric ozone layer absorbs the biologically damaging wavelengths of ultraviolet (UV) rays but in the 1970s, Australia’s ozone layer was severely thinned as a consequence of heavy use of ozone-depleting, substances such as chloroflurocarbons (CFCs) and hydro-chloroflurocarbons (HCFCs).
Why is the sun so bad in Australia?
Australia’s unusually harsh sunshine results mainly from its location in the Southern Hemisphere. The elliptical orbit of the Earth places the Southern Hemisphere closer to the sun during its summer months than the Northern Hemisphere during its summer.
Why Australia has no ozone layer?
The ozone layer is depleted in two ways. Firstly, the ozone layer in the mid-latitude (e.g. over Australia) is thinned, leading to more UV radiation reaching the earth. Secondly, the ozone layer over the Antarctic, and to a lesser extent the Arctic, is dramatically thinned in spring, leading to an ‘ozone hole’.
Why is there a hole in the ozone over Australia?
As sun-loving Australians, we’re all too familiar with the damage UV can cause. During the 1980s, scientists discovered that key ODSs known as chlorofluorocarbons (CFCs) caused significant damage to the ozone layer. This resulted in the so-called ‘hole in the ozone layer’.
Does Australia have a rabbit problem?
Australia has had a problem with European rabbits since their introduction to the continent in the late 19th century. Now, it is estimated that approximately 200 million feral rabbits inhabit Australia.
Why is Australia UV so high?
During summer, the Earth’s orbit brings Australia closer to the sun (as compared to Europe during its summer), resulting in an additional 7% solar UV intensity. Coupled with our clearer atmospheric conditions, this means that Australians are exposed to up to 15% more UV than Europeans.
Why is UV so high in Australia?
Which part of Australia has ozone hole?
The ozone hole has only ever been observed to be well south of the Australian mainland and Tasmania. In fact, during springtime, when the hole is in existence, ozone levels over southern Australian cities are at their highest.
Why does Australia hate rabbits?
Such wild rabbit populations are a serious mammalian pest and invasive species in Australia causing millions of dollars’ worth of damage to crops. The myxoma virus, which causes myxomatosis, was introduced into the rabbit population in the 1950s and had the effect of severely reducing the rabbit population.
Do we have Hares in Australia?
Wild rabbits and hares were both introduced into Australia in the mid-1800’s. Both introduced species are established in south-east Queens- land. Hares are not a declared pest. There is no requirement to con- trol hares.
Why are ozone levels so high in Queensland?
In recent years, ozone levels higher than guideline values in South East Queensland have usually been associated with bushfires or burning-off events during calm weather conditions. Rather than being dispersed by winds the stable weather conditions allow the bushfire emissions to build up.
Is the ozone so thin in this part of the world?
The ozone is so thin in this part of the world that the weather report on the nightly news includes five-minute sunburn alerts. Ozone is Earth’s natural sunscreen.
What are the air quality standards for ozone?
The recommended air quality standards for ozone are: 1 0.10 parts per million (ppm) for a 1-hour exposure period 2 0.08ppm for a 4-hour exposure period. More