# Question: the wind measurements made at 50 km around a weather...

###### Question details

The wind measurements made at 50 km around a weather station are
the

following:

50 km to the east: size 10 m / s, direction 90º

50 km north: size 4 m / s, direction 120º

50 km to the west: size 8 m / s, direction 90º

50 km to the south: size 4 m / s, direction 60º

a) Calculate the wind divergence in this station.

(b) If, in the atmospheric boundary layer, whose thickness is 500
m, the

horizontal wind does not change with z and is zero on the surface,
what is the

vertical wind speed at the top of the boundary layer? (The density
of the air

in the boundary layer is considered constant)

c) Suppose that wind measurement errors are 10%. What is the
mistake

maximum associated with calculating the horizontal
divergence?

d) What can be concluded about accuracy in estimating vertical
velocity

by this method?

Thanks for you help