Assertion: cirrus | /r/HasProperty | thick
Facets:
value: exceptionally
type: DEGREE
Source sentences:
text: When cirrus clouds are 100 m (330 ft) thick, they reflect only around 9% of the incoming sunlight, but they prevent almost 50% of the outgoing infrared radiation from escaping, thus raising the temperature of the atmosphere beneath the clouds by an average of 10 °C (18 °F)—a process known as the greenhouse effect.
text: When they are exceptionally thick they may veil its light and obliterate its contour.