Chapter 10 - Winds

Veering is the term for (P.149):

• wind blowing from low pressure to high pressure

• wind blowing from high pressure to low pressure

• change of wind in an anticlockwise direction

• change of wind in a clockwise direction

The device used to measure wind speed is (P.150):

• wind vane

• ceilometer

• transmissometer

• anemometer

Coriolis Force (P.152)

• causes the wind to veer in the Southern hemisphere

• causes the wind to back in the Southern hemisphere

• causes the wind to back in the Northern hemisphere

• is maximum at the Equator

Geostrophic wind (P.153):

• blows parallel to straight isobars

• blows perpendicular to straight isobars

• blows parallel to curved isobars

• blows from low pressure to high pressure

Geostrophic wind (P.154):

• blows above and within the friction layer

• only blows within the friction layer

• only blows above the friction layer

• blows from within the friction layer to above the friction layer

Below 2,000 feet (P.154):

• Coriolis force is greater than pressure gradient force

• Coriolis force is weaker than pressure gradient force

• Geostrophic wind will be blowing near the surface

• Wind will be stronger on the surface

Gradient wind (P.155):

• blows along curved isobars

• blows along straight isobars

• blows from low pressure to high pressure

• blows from Southern hemisphere to Northern hemisphere

The surface wind at Sydney airport (Australia) is 240^o / 30 knots. At 2,000 feet the wind is approximately (P.158):

• 210^o / 30 knots

• 270^o / 30 knots

• 210^o / 60 knots

• 270^o / 60 knots

During the night in the Northern hemisphere, the surface wind will (P.160):

• increase and veer

• increase and back

• decrease and veer

• decrease and back

Katabatic wind is (P.166):

• the same as mountain waves

• stronger than rotor waves

• wind blowing down a hill at night

• wind blowing up a will during the day