What is Clear?
Observation of the sky from the observer's location where there are no clouds, and there is no obstruction to visibility. Clear sky. In meteorology, this term is also used when the cloud cover is less than 1/8 during the day or at the observation hour.
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A periodic cooling of sea surface temperatures in the central and eastern Pacific Ocean, often leading to altered global...
The measure of the water vapor or moisture content in the air, expressed as the mass of water vapor per unit volume of air....
A strong, downward wind caused by a localized column of air sinking rapidly, often resulting in damage similar to that caused...
The reflectance rate of a surface, indicating the amount of electromagnetic radiation reflected from the surface. It depends...
Air laden with sand and dust, common in areas devoid of permanent vegetation, especially deserts.
A drainage wind that flows downhill due to gravity, often associated with cold air descending from elevated regions.
A prefix used in cloud nomenclature to describe middle-altitude clouds that form between 6,500 and 20,000 feet, such as altostratus...
Particles such as pollen, grass seeds, or dust in the air that cause allergies and are transported by winds.
The term used for turbulence occurring in the absence of clouds or cloud-like elements in the visible area. It is often observed...
The decrease in temperature with height in an adiabatically rising air parcel (lapse rate). For dry air, this value is 1...