25. Clouds [and Fogs]

CLOUDS [AND FOGS] J.T. II Olivar, MAEd Faculty of Arts and Letters University of Santo Tomas

Outline of the Lecture • Cloud Forms • Cloud Families • Types of Fogs

Clouds • Are collections of minute droplets of water or tiny crystals of ice. • At any given time, clouds cover about 50% of Earth.

Cloud Forms • Cirriform – Cirrus meaning lock of hair

• Stratiform – Stratus meaning spread out

• Cumuliform – Cumulus meaning mass or pile

Cloud Families • High Clouds – Cirrus, Cirrocumulus, Cirrostratus

• Middle Clouds

– Altocumulus, Altostratus

• Low Clouds

– Stratus, Stratocumulus, Nimbostratus

• Clouds of Vertical Development – Cumulus, Cumulonimbus

Types of Fog – Minor form of condensation • Radiation fog • Advection fog • Upslope fog or

Orographic fog • Evaporation fog

• Steam fog • Precipitation fog • Ground fog • Valley fog • Ice fog • Freezing fog • Artificial fog