At a latitude 30,there is a pressure gradient of 5.0 mb per 100 km.given the density of air 1.25 kg/m3.the geostrophic winds will have velocity in m/s
Answers
Answer:54.86 m/s
Explanation:
Geostrophic force
GF = 2wrVsinq
where w = the Earth’s rotational velocity, r is density, V is the wind speed and q is the latitude. You can see that, as latitude increases, so will the geostrophic force, or that the wind speed will decrease. To get windspeed, at 2,000 feet, the wind is parallel to the isobars (when they are straight and parallel), meaning that the PGF must be balanced by another force, which we shall call GF. Now all you need to do is swap GF for PGF and play with the formula:
V = PGF
2wrsinq
It also shows that the windspeed increases with height as density reduces, but it all breaks down within about 15° of the Equator, or you would have an infinite windspeed. Given the same pressure gradient at 40°N, 50°N and 60°N, the geostrophic wind speed will be greatest at 40°N.
Answer:
4.86 m/s
Explanation:
Geostrophic force
GF = 2wrVsinq
where w = the Earth’s rotational velocity, r is density, V is the wind speed and q is the latitude. You can see that, as latitude increases, so will the geostrophic force, or that the wind speed will decrease. To get windspeed, at 2,000 feet, the wind is parallel to the isobars (when they are straight and parallel), meaning that the PGF must be balanced by another force, which we shall call GF. Now all you need to do is swap GF for PGF and play with the formula:
V = PGF
2wrsinq
It also shows that the windspeed increases with height as density reduces, but it all breaks down within about 15° of the Equator, or you would have an infinite windspeed. Given the same pressure gradient at 40°N, 50°N and 60°N, the geostrophic wind speed will be greatest at 40°N.on: