In which one of the following regions of the Earth is the ozone hole prominently observed in the stratosphere?
Antarctic region
The ozone hole is the pronounced, seasonal (spring-time) thinning of stratospheric ozone driven by chlorine and bromine compounds released from CFCs, and its effect is strongest where extreme cold enables polar stratospheric clouds that accelerate ozone-destroying reactions.
This depletion is most prominent and largest over the Antarctic region because the extremely cold, stable polar vortex there creates ideal conditions for these reactions; a smaller, less pronounced version occurs over the Arctic. The equatorial and tropical regions do not exhibit this phenomenon.
Hence, the answer is Antarctic region.
Important Questions from Ozone Layer Depletion
- Which of the following is a catalytically inactive (or reservoir) molecule containing chlorine in stratosphere?
- Choose the correct statement(s)
A. O$_3$ in stratosphere is not completely effective in shielding us from UV-B
B. UV-A is biologically least harmful.
C. Chapman mechanism deals with only O$_3$ formation in stratosphere.
D. Sunscreen lotions either reflect or absorb or scatter UV-B and UV-A
E. UV-B helps in dissociation of O$_3$ molecule in stratosphere.
Choose the correct answer from the options given below. Ozone layer depletion is a major phenomenon in :
- With regard to ozone depletion over Antarctica, select the false statement :
- Atmospheric life times of CFCs is typically in the range :
