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# Which of the statement given below is correct?a)We do not observe strong vertical currents of air because the vertical pressure gradient is very small when compared to the horizontal.b)The atmosphere near the surface of earth gets heated due to convection while at some height it gets heated due to radiation.c)If the velocity of wind is greater, then due to Coriolis force the deflection of wind is greater.d)Isobars are more continuous in the Northern Hemisphere because of presence of greater landmass.Correct answer is option 'C'. Can you explain this answer? Related Test: UPSC Paper 1 Mock Test - 11

## UPSC Question

By KANISHKA · Aug 07, 2020 ·UPSC
Kitabo Devi answered Aug 08, 2020
Vertical pressure gradient is much larger than horizontal pressure gradient, but strong verticals current are not observed because the pressure gradient force is balanced by the downward gravitational force.
Near the surface air is heated due to conduction, while at some height the air is heated due to convection of air where cold air from top moves down and gets heated by coming in contact with earth & then moves up & the cycle continues.
Because of presence of the continuous oceans in the southern hemisphere it has more continuous isobars, while in north the continuity is broken due to alternate presence of land & water

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