What atmospheric conditions are usually associated with clear or glazed icing?

The presence of clear or glazed icing is most commonly associated with atmospheric conditions found in cumulus clouds at temperatures ranging from 0 to -10°C. This type of icing occurs when supercooled water droplets, which are liquid despite being below freezing, come into contact with an aircraft. In these conditions, the droplets can freeze upon impact with the aircraft's surface, creating a smooth, clear layer of ice.

Cumulus clouds are typically associated with vertical development and can often contain areas of warm air rising through cooler air, leading to the presence of supercooled water droplets at the specified temperature range. When aircraft encounter these supercooled droplets, the resulting icing manifests as clear or glazed ice, which can be particularly hazardous due to its weight and impact on aerodynamic performance.

Other choices refer to different cloud types and conditions that either do not typically produce the same characteristics of clear icing or may relate to different forms of icing altogether. For example, cold stratus clouds tend to be associated with rime icing rather than clear icing. Warm front occlusions typically involve more stable, less turbulent air which does not favor the accumulation of supercooled water droplets, and altostratus clouds at -5°C may produce a mix of icing types but are less