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The formation of ozone hole in the Antarctic region has been a cause, of concern. What could be the reason for the formation of this hole?
- a)Presence of prominent tropospheric turbulence; and inflow of chlorofluorocarbons
- b)Presence of prominent polar front and stratospheric clouds; and inflow of chlorofluorocarbons
- c)Absence of polar front and stratospheric clouds; and inflow of methane and chlorofluorocarbons.
- d)Increased temperature at polar region due to global warming
Correct answer is option 'B'. Can you explain this answer?
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The formation of ozone hole in the Antarctic region has been a cause, ...
Explanation: In 1980s atmospheric scientists working in Antarctica reported about depletion of ozone layer commonly known as ozone hole over the South Pole. It was found that a unique set of conditions was responsible for the ozone hole. In summer season, nitrogen dioxide and methane react with chlorine monoxide (reaction iv) and chlorine atoms (reaction v) forming chlorine sinks, preventing much ozone depletion, whereas in winter, special type of clouds called polar stratospheric clouds are formed over Antarctica. These polar stratospheric clouds provide surface on which chlorine nitrate formed (reaction iv) gets hydrolysed to form hypochlorous acid (reaction (vi)). It also reacts with hydrogen chloride produced as per reaction (v) to give molecular chlorine.
When sunlight returns to Antarctica in the spring, the sun’s warmth breaks up the clouds and HOCl and Cl2 are photolysed by sunlight, as given in reactions (viii) and (ix). The chlorine radicals thus formed, initiate the chain reaction for ozone depletion as described earlier.
Educational Objective: Test candidate's understanding of Ozone hole formation.
When sunlight returns to Antarctica in the spring, the sun’s warmth breaks up the clouds and HOCl and Cl2 are photolysed by sunlight, as given in reactions (viii) and (ix). The chlorine radicals thus formed, initiate the chain reaction for ozone depletion as described earlier.
Educational Objective: Test candidate's understanding of Ozone hole formation.
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The formation of ozone hole in the Antarctic region has been a cause, ...
Reason for Formation of Ozone Hole in Antarctic Region
Introduction
The formation of the ozone hole in the Antarctic region is a cause for concern due to its harmful effects on human health and the environment. It is essential to understand the reasons behind the formation of this hole to take appropriate measures to prevent it.
Presence of Prominent Polar Front and Stratospheric Clouds
The primary reason for the formation of the ozone hole in the Antarctic region is the presence of a prominent polar front and stratospheric clouds. The polar front is an area where the cold polar air meets the warm subtropical air, creating a boundary. The stratospheric clouds or polar stratospheric clouds (PSCs) are formed in the stratosphere at high altitudes, usually during the winter months. These clouds are composed of tiny ice crystals and provide a surface for chemical reactions that destroy ozone.
Inflow of Chlorofluorocarbons
Another significant factor that contributes to the formation of the ozone hole is the inflow of chlorofluorocarbons (CFCs) into the atmosphere. CFCs are chemicals that were widely used in refrigerants, air conditioners, and aerosol sprays. When CFCs reach the upper atmosphere, they break down into chlorine atoms, which react with ozone and destroy it.
Conclusion
In conclusion, the formation of the ozone hole in the Antarctic region is mainly due to the presence of a prominent polar front and stratospheric clouds, combined with the inflow of CFCs into the atmosphere. It is essential to reduce the use of CFCs and other ozone-depleting substances to prevent the formation of the ozone hole and protect the environment.
Introduction
The formation of the ozone hole in the Antarctic region is a cause for concern due to its harmful effects on human health and the environment. It is essential to understand the reasons behind the formation of this hole to take appropriate measures to prevent it.
Presence of Prominent Polar Front and Stratospheric Clouds
The primary reason for the formation of the ozone hole in the Antarctic region is the presence of a prominent polar front and stratospheric clouds. The polar front is an area where the cold polar air meets the warm subtropical air, creating a boundary. The stratospheric clouds or polar stratospheric clouds (PSCs) are formed in the stratosphere at high altitudes, usually during the winter months. These clouds are composed of tiny ice crystals and provide a surface for chemical reactions that destroy ozone.
Inflow of Chlorofluorocarbons
Another significant factor that contributes to the formation of the ozone hole is the inflow of chlorofluorocarbons (CFCs) into the atmosphere. CFCs are chemicals that were widely used in refrigerants, air conditioners, and aerosol sprays. When CFCs reach the upper atmosphere, they break down into chlorine atoms, which react with ozone and destroy it.
Conclusion
In conclusion, the formation of the ozone hole in the Antarctic region is mainly due to the presence of a prominent polar front and stratospheric clouds, combined with the inflow of CFCs into the atmosphere. It is essential to reduce the use of CFCs and other ozone-depleting substances to prevent the formation of the ozone hole and protect the environment.
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The formation of ozone hole in the Antarctic region has been a cause, of concern. What could be the reason for the formation of this hole?a)Presence of prominent tropospheric turbulence; and inflow of chlorofluorocarbonsb)Presence of prominent polar front and stratospheric clouds; and inflow of chlorofluorocarbonsc)Absence of polar front and stratospheric clouds; and inflow of methane and chlorofluorocarbons.d)Increased temperature at polar region due to global warmingCorrect answer is option 'B'. Can you explain this answer?
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The formation of ozone hole in the Antarctic region has been a cause, of concern. What could be the reason for the formation of this hole?a)Presence of prominent tropospheric turbulence; and inflow of chlorofluorocarbonsb)Presence of prominent polar front and stratospheric clouds; and inflow of chlorofluorocarbonsc)Absence of polar front and stratospheric clouds; and inflow of methane and chlorofluorocarbons.d)Increased temperature at polar region due to global warmingCorrect answer is option 'B'. Can you explain this answer? for UPSC 2024 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about The formation of ozone hole in the Antarctic region has been a cause, of concern. What could be the reason for the formation of this hole?a)Presence of prominent tropospheric turbulence; and inflow of chlorofluorocarbonsb)Presence of prominent polar front and stratospheric clouds; and inflow of chlorofluorocarbonsc)Absence of polar front and stratospheric clouds; and inflow of methane and chlorofluorocarbons.d)Increased temperature at polar region due to global warmingCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for UPSC 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The formation of ozone hole in the Antarctic region has been a cause, of concern. What could be the reason for the formation of this hole?a)Presence of prominent tropospheric turbulence; and inflow of chlorofluorocarbonsb)Presence of prominent polar front and stratospheric clouds; and inflow of chlorofluorocarbonsc)Absence of polar front and stratospheric clouds; and inflow of methane and chlorofluorocarbons.d)Increased temperature at polar region due to global warmingCorrect answer is option 'B'. Can you explain this answer?.
The formation of ozone hole in the Antarctic region has been a cause, of concern. What could be the reason for the formation of this hole?a)Presence of prominent tropospheric turbulence; and inflow of chlorofluorocarbonsb)Presence of prominent polar front and stratospheric clouds; and inflow of chlorofluorocarbonsc)Absence of polar front and stratospheric clouds; and inflow of methane and chlorofluorocarbons.d)Increased temperature at polar region due to global warmingCorrect answer is option 'B'. Can you explain this answer? for UPSC 2024 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about The formation of ozone hole in the Antarctic region has been a cause, of concern. What could be the reason for the formation of this hole?a)Presence of prominent tropospheric turbulence; and inflow of chlorofluorocarbonsb)Presence of prominent polar front and stratospheric clouds; and inflow of chlorofluorocarbonsc)Absence of polar front and stratospheric clouds; and inflow of methane and chlorofluorocarbons.d)Increased temperature at polar region due to global warmingCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for UPSC 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The formation of ozone hole in the Antarctic region has been a cause, of concern. What could be the reason for the formation of this hole?a)Presence of prominent tropospheric turbulence; and inflow of chlorofluorocarbonsb)Presence of prominent polar front and stratospheric clouds; and inflow of chlorofluorocarbonsc)Absence of polar front and stratospheric clouds; and inflow of methane and chlorofluorocarbons.d)Increased temperature at polar region due to global warmingCorrect answer is option 'B'. Can you explain this answer?.
Solutions for The formation of ozone hole in the Antarctic region has been a cause, of concern. What could be the reason for the formation of this hole?a)Presence of prominent tropospheric turbulence; and inflow of chlorofluorocarbonsb)Presence of prominent polar front and stratospheric clouds; and inflow of chlorofluorocarbonsc)Absence of polar front and stratospheric clouds; and inflow of methane and chlorofluorocarbons.d)Increased temperature at polar region due to global warmingCorrect answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for UPSC.
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