Essay On Precipitation

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Precipitation is water that is released from the cloud in the form of rain, sleet, freezing rain, hail and snow. Rain is actually liquid water that is in the form of water droplets, which have been condensed from atmospheric water vapour and then precipitated (become heavy and fall to the ground under gravity). Sleet is liquid raindrops in a layer of warm air on the surface, which fall into a thick layer of freezing air on the ground. The liquid freezes before reaching the ground. Freezing rain is liquid raindrops in a layer of warm air on the surface, which fall into a thin layer of freezing air on the ground. The liquid has no enough time to freeze before reaching the ground. Hail is solid precipitation that consists of balls of distinct lumps of ice, which is called hailstone. This precipitation usually produces by cumulonimbus cloud. Snow falls in the form of snowflakes (tiny ice crystal collide in the cloud) when the temperatures are low, which is below 2°C and there is moisture. Precipitation process can occur in warm clouds and cold clouds. Warm cloud is a cloud that only contains liquid water although the temperature is below 0 degree Celsius. Cold cloud is a cloud that contains the mixture of…show more content…
The facts that important for this process are the saturation vapor pressure respect to water is more than the saturation vapor pressure respect to ice and the pure water droplets do not freeze at 0°C because of the surface tension and the structure of water. Formation of the precipitation starts when the air reaches saturation and there will be some of the droplets in contact with freezing nuclei, which these nuclei allow the droplets to freeze around them. Then, ice crystals and supercooled water (liquid water that is cooler than 0°C) exist because of the relative sparseness of the freezing

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