2017 · Q45
Which one of the following statements with regard to Jet stream, an upper level tropospheric wave, is not correct?
General KnowledgeGeography
- AIt is a narrow band of high-velocity wind.
- BIt follows the wave path near the tropopause at elevations of 8 km to 15 km.
- CJet streams are typically continuous over long distances.
- DIn summer, the polar front jet achieves its maximum force.
Explanation
The polar-front jet stream is strongest in winter, when the equator-to-pole temperature contrast is greatest — not in summer. The other statements (a narrow high-velocity band, a wave path near the tropopause at 8–15 km, typically continuous over long distances) are correct. Hence D.