Turbulence

#1. The vertical extent of the friction layer depends primarily on

• Aroughness of surface, temperature, local time
• Btemperature, local time, environmental lapse rate
• Cstability, wind speed, roughness of surface
• Dwind speed, roughness of surface, temperature

#2. Low level wind shear is likely to be greatest

• Aat the top of a marked surface-based inversion
• Bat the condensation level when there is no night radiation.
• Cat the condensation level when there is strong surface friction
• Dat the top of the friction layer

#3. Which cloud type may indicate the presence of severe turbulence?

• ACirrocumulus
• BNimbostratus
• CAltocumulus lenticularis
• DStratocumulus