Consider the following statements:
- Jet Streams occur in the Northern Hemisphere only.
- Only some cyclones develop an eye.
- The temperature inside the eye of a cyclone is nearly 10 degree Celsius lesser than that of the surroundings.
Which of the statements given above is/are correct?
- 1 only
- 2 and 3 only
- 2 only
- 1 and 3 only
Explanation
Statement 1 is incorrect
- Jet streams occur in both the Northern and Southern Hemispheres.
Statement 2 is correct
- The center of a tropical cyclone is called the eye, where winds are calm and there is typically no rainfall. In contrast, in a temperate cyclone (or extratropical cyclone), there is no single region where winds and precipitation are completely inactive.
Statement 3 is incorrect
- Along the eye, the air is slowly sinking and is heated due to compressional warming (adiabatic). The eye temperature may be 10°C warmer or more at an altitude of 12 km than the surrounding environment, but only 0-2°C warmer at the surface in the tropical cyclone.
- Eyes range in size from 8 km to over 200 km across, but most are approximately 30-60 km in diameter
