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 distinct layer in a body of water where the temperature changes rapidly with depth, separating warmer surface water from...
The state of the atmosphere when it contains the maximum amount of water vapor possible at a given temperature and pressure.
A cold front is the leading edge of a cold air mass that replaces a warmer air mass. It is typically associated with sudden...
Thermodynamic changes occurring within a system without any exchange of heat with the surroundings. In the atmosphere, changes...
The lowest level of a given cloud or cloud layer in the atmosphere, relative to the observer's position above the ground.
Cloud or rain droplets containing pollutants, such as oxides of sulfur and nitrogen, to make them acidic.
An instrument for measuring atmospheric pressure.
A deviation from the normal or expected value in atmospheric or climatic conditions, often used in meteorology to identify...
An instrument that continuously records atmospheric pressure over time. It uses a barometer to measure pressure and creates...
A continental air mass is a large body of air that forms over land, characterized by dry conditions due to the lack of moisture...