Which consequence results on polar jet streams due to thermal expansion?

A)Weaker zonal wind intensity equatorward

B)Steeper isobaric surface height gradient

C)Enhanced Rossby wave formation instability✓

D)Decreased meridional temperature contrast poleward

💡 Explanation

Enhanced warming at high latitudes from thermal expansion reduces the meridional temperature gradient; because baroclinic instability is proportional to the temperature gradient, Rossby wave amplitude increases, therefore the increased Rossby waves, rather than stable zonal flow, causes jet stream meandering.

🏆 Up to £1,000 monthly prize pool

Ready for the live challenge? Join the next global round now.
*Terms apply. Skill-based competition.

⚡ Enter Arena

Which consequence results on polar jet streams due to thermal expansion?

💡 Explanation

Related Questions