Why ozone hole forms over anfartica ? How will enchanced uv radiations affect us ?
Answers
Answer:
Ozone hole forms over Antarctica as it is close to pole and methane accumulates there due to pressure difference.
Explanation:
enhanced uv radiation affects us by breaking bonds of CFCs which releases Cl- which acts as a catalyst to degrade ozone. We have taken some major steps to stop bring down the level of CFCs and Ozone hole is healing but at slow rate.
Answer:
Ozone holes are more apparent in the region of Antarctica. They are formed as a result of an increased concentration of chlorine in the atmosphere. The release of chlorine is mainly from Chlorofluorocarbons (CFCs) which is extensively used as a refrigerant. The CFCs migrate from different layers of the atmosphere – troposphere to stratosphere, where chlorine atoms are released by the action of UV radiations on them. Liberation of chlorine atoms leads to the conversion of ozone into molecular oxygen. One chlorine atom can destruct 10,000 ozone molecules, causing ozone depletion. Ozone hole formation will result in an increased concentration of UV-B radiations on the surface of earth. The UV – B is known to damage DNA, activating the process of skin ageing. Also, it causes darkening of skin and skin cancer. In humans, high levels of UV-B causes corneal cataract.