Please explain why? Multiple choice. Indicate which of the following statements

Question

Please explain why?

Multiple choice. Indicate which of the following statements are correct. An unstable atmosphere: (a) causes turbulence to be damped; b) usually results in a vertical profile of the horizontal wind velocity that is more uniform tharn that of a stable atmosphere; causes the mean horizontal wind velocity to be larger (on a regional scale) than that ofa neutral atmosphere; (c) (d in the surface layer is favorable to disperse the pollutants; (e) is likely to be found over a deep lake in the spring, when warm air blows over the water

Explanation / Answer

2.1 instable atmosphere is the one where the vertical stability of the atmosphere is compromised

in instable part of atmosphere the air packet at an altitude h wil be warmer than the air packet in stabel atmosphere at the samer altitude, abnd hence this packet is less dense and prone top further ascent

this increases vertical mean velocity of the air and provides a v ertical air velocity profile

this increases turbulence, and vertical profile of the air velocity is not uniform and a bit more pronounced than the vertical air profile of a stabel atmosphere

also. due to instablitly,. the pollutants near the surface are lifted up and dispersed more efficiently byt he upward moving air

hence option d. is correct because

the pollutants near the surface are lifted up and dispersed more efficiently byt he upward moving air

a, b, c are generalyy incoorrect as explaned above

on a deep spring in spring, when warm air blows over it, it loses its temperature becoming cold, where as the wind blowing over land nearby loses less heat to the land ( as l;an becomes waRMER SOON due to lower heat capacity)

hence this density variation at same altitude nearby causes instability in the atmosphere

hence option e is correct too

Related Questions

Navigate

• Browse (All)
• Browse P
• Subjects

---