Question:
Given below are two statements:
Statement (I): In the atmosphere, 90% of the ozone is distributed in the troposphere, while only 10% is confined to the stratosphere.
Statement (II): According to IPCC (2007) estimated value of radiative forcing from the tropospheric ozone is to be 0.35 \(\pm\) 0.15 W m\(^{-2}\).
In light of the above statements, choose the most appropriate answer from the options given below.
Given below are two statements:
Statement (I): In the atmosphere, 90% of the ozone is distributed in the troposphere, while only 10% is confined to the stratosphere.
Statement (II): According to IPCC (2007) estimated value of radiative forcing from the tropospheric ozone is to be 0.35 \(\pm\) 0.15 W m\(^{-2}\).
In light of the above statements, choose the most appropriate answer from the options given below.
Statement (I): In the atmosphere, 90% of the ozone is distributed in the troposphere, while only 10% is confined to the stratosphere.
Statement (II): According to IPCC (2007) estimated value of radiative forcing from the tropospheric ozone is to be 0.35 \(\pm\) 0.15 W m\(^{-2}\).
In light of the above statements, choose the most appropriate answer from the options given below.
Show Hint
Recall which layer, troposphere or stratosphere, actually holds most of the atmosphere's ozone.
Updated On: Jul 6, 2026
- Both Statement (I) and Statement (II) are correct.
- Both Statement (I) and Statement (II) are incorrect.
- Statement (I) is correct but Statement (II) is incorrect.
- Statement (I) is incorrect but Statement (II) is correct.
Show Solution
Verified By Collegedunia
The Correct Option is D
Solution and Explanation
Step 1: Understanding the Question:
This question checks how much you know about where ozone sits in the atmosphere and how tropospheric ozone affects the planet's energy balance.
Step 2: Key Formula or Approach:
The atmosphere holds two ozone pools. Almost 90% of all atmospheric ozone sits in the stratosphere, where it forms the protective ozone layer between about 15 and 35 km height. Only about 10% sits in the troposphere, the layer we live in. So Statement (I), which flips this ratio, is wrong.
For radiative forcing, the IPCC Fourth Assessment Report (2007) gave the radiative forcing from tropospheric ozone as about +0.35 W per square metre, with an uncertainty range of about 0.25 to 0.65 W per square metre. Written as a plus or minus band around the central value, this comes out close to 0.35 \(\pm\) 0.15 W m\(^{-2}\), matching Statement (II).
Step 3: Detailed Explanation:
Statement (I) says 90% of ozone lies in the troposphere and only 10% in the stratosphere. In reality it is the reverse: the stratosphere holds the bulk of atmospheric ozone because that is where ozone forms from the action of ultraviolet light on oxygen molecules. So Statement (I) is incorrect.
Statement (II) reports the IPCC (2007) radiative forcing value for tropospheric ozone as 0.35 \(\pm\) 0.15 W m\(^{-2}\). This matches the IPCC AR4 figure closely, so Statement (II) is correct. Tropospheric ozone acts as a greenhouse gas, and this radiative forcing value reflects its warming effect on the lower atmosphere.
Step 4: Final Answer:
Statement (I) is incorrect and Statement (II) is correct, so option (4) is the right choice.
This question checks how much you know about where ozone sits in the atmosphere and how tropospheric ozone affects the planet's energy balance.
Step 2: Key Formula or Approach:
The atmosphere holds two ozone pools. Almost 90% of all atmospheric ozone sits in the stratosphere, where it forms the protective ozone layer between about 15 and 35 km height. Only about 10% sits in the troposphere, the layer we live in. So Statement (I), which flips this ratio, is wrong.
For radiative forcing, the IPCC Fourth Assessment Report (2007) gave the radiative forcing from tropospheric ozone as about +0.35 W per square metre, with an uncertainty range of about 0.25 to 0.65 W per square metre. Written as a plus or minus band around the central value, this comes out close to 0.35 \(\pm\) 0.15 W m\(^{-2}\), matching Statement (II).
Step 3: Detailed Explanation:
Statement (I) says 90% of ozone lies in the troposphere and only 10% in the stratosphere. In reality it is the reverse: the stratosphere holds the bulk of atmospheric ozone because that is where ozone forms from the action of ultraviolet light on oxygen molecules. So Statement (I) is incorrect.
Statement (II) reports the IPCC (2007) radiative forcing value for tropospheric ozone as 0.35 \(\pm\) 0.15 W m\(^{-2}\). This matches the IPCC AR4 figure closely, so Statement (II) is correct. Tropospheric ozone acts as a greenhouse gas, and this radiative forcing value reflects its warming effect on the lower atmosphere.
Step 4: Final Answer:
Statement (I) is incorrect and Statement (II) is correct, so option (4) is the right choice.
Was this answer helpful?
0
0
Top ICAR AIEEA Agronomy Questions
- The causal organism of downy mildew of grapevine is .
- Match Chemicals with their Use.
Chemical Used as (A) Thiophanate-methyl (I) Weedicide (B) Atrazine (II) Insecticide (C) Fenamiphos (III) Fungicide (D) Afidopyropen (IV) Nematicide
Choose the correct answer from the options given below: - Arrange the following spores of black rust fungi in their I to IV spore stages.
(A) Basidiospore
(B) Uredospore
(C) Aeciospore
(D) Teliospore
Choose the correct answer from the options given below: - Given below are two statements:
Statement (I): According to response of length of day and night on the flowering of plants, they are classified as long day or short day plants.
Statement (II): Wheat and oat are long day plants.
In light of the above statements, choose the most appropriate answer from the options given below. - Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R).
Assertion (A): A series of cellulolytic enzymes are employed in the wood degradation process by brown rot fungi.
Reason (R): Lignin is not degraded by these fungi, therefore, it has typical brown colour wood remains.
In light of the above statements, choose the most appropriate answer from the options given below.
View More Questions
Top ICAR AIEEA Questions
- Which of the following statements is false?
- Which of the following is an example of an inventory?
- According to Adam Smith, productivity gains could be brought about through .
- The supply curve for an artificially scarce good is .
- Which of the following would not be considered an opportunity cost of paid employment?
View More Questions