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 deviation from the normal or expected value in atmospheric or climatic conditions, often used in meteorology to identify...
A drainage wind that flows downhill due to gravity, often associated with cold air descending from elevated regions.
A measurement determined by the wave lengths and sea conditions caused by the effect of wind, and by the movement of tree...
Considerable cloudiness refers to weather conditions where a large portion of the sky is covered with clouds, but some clear...
An instrument that continuously records atmospheric pressure over time. It uses a barometer to measure pressure and creates...
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A thermodynamic change process in the system without any exchange of heat or transfer of energy between systems. This process...
The amount of radiation, heat, or light passing through or flowing from a unit area of a surface.
A cold front is the leading edge of a cold air mass that replaces a warmer air mass. It is typically associated with sudden...
Cloud or rain droplets containing pollutants, such as oxides of sulfur and nitrogen, to make them acidic.