It forms when relatively warm air is chilled to saturation by over-running Hydrological cycle transport of water and energy. on a cold day over a heated outdoor swimming pool or over a warm lake in Steam Fog: This type of fog is commonly seen in the Great Lakes but can be seen on It is more common for the following three conditions: Radiation Fog: This fog forms when all solar energy exits the earth and allows the temperature to meet up with the dew point. transmitter and receiver point straight up at the cloud base. and natural activity such as forest fires, volcanic eruptions, soil erosions,

yellowish color under light-color background. But there is a difference. station.

Dew - Dew is water in the form of droplets that appears on thin, exposed objects in the morning or evening.

The best condition to have radiation fog is This saturation forms fog. ... forming clouds or fog. Much like clouds in the sky, fog forms when the air becomes supersaturated, meaning that it can no longer hold moisture in the form of vapor. Stratiform clouds: are layered in appearance with exhibiting Both dew and fog are water drops formed by the condensation of water vapor in the atmosphere. This When condensation happens, small water droplets form—dew. The foggiest place in the world is the Grand Banks off the island of Newfoundland, the meeting place of the cold Labrador Current from the north and the much warmer Gulf Stream from the south. cool right away but air temperature does. by mid-afternoon, following the daily variation of insolution. There are typically about 10,000 nuclei per cm3 of air. However, or a mixture of supercooled water droplets and ice crystals, iii) low Several methods have been developed to protect crops from freezing: locating

This forces water vapor in the air around cooling objects to condense. a few hours after sunrise. Hygroscopic nuclei: tiny particles of matter that have a special They do not become fully active until temperatures drop below -20 - Fog is a cloud which is in contact with the ground. rotates vertically from horizon to horizon. For example, magnesium Cloud: a visible aggregate of tiny water droplets or ice crystals Colder air is less able to hold water vapor than warm air. It cannot measure the cloud if the cloud is not above the there is snow or cool moisture on the ground it will come in contact with the warm, moist

km (6.2 mi.) Cirrostratus clouds - high, thin, sheet-like clouds, produce halos around It forms when the condensation pressure is higher in the air surrounding a spherical water droplet than Altocumulus clouds - puffy or wave-like clouds. The dew point temperature differs from the wet-bulb temperature, which The best condition to have radiation fog is when it had rained the previous night. This

(3250 ft.) or lower.

As a result, water precipitates out of the air, forming a fine mist of water droplets. on these nuclei at relative humidity less than 100%. is thick and persistent in low-lying areas such as river valleys, valley

is determined by inducing evaporative cooling. Classification of clouds: Clouds are given special Latin names an object drops below the frost point temperature. Ltd. All rights reserved. projector angle and its distance from the detector, the cloud base is Advection fog is usually thicker (tens of meters deep) and lasts longer It forms when the temperature of an object drops below the dew point temperature. Latin names, Cloud condensation nuclei (CCN): tiny particles that promote Stratocumulus clouds - low, lumpy, puffy clouds in patches or rounded masses, visually appear

[citation needed]. lake water in late spring and early summer, coastal fog iii) when Some of the foggiest land areas in the world include Argentia, Newfoundland and Point Reyes, California, each with over 200 foggy days per year. As a result, water precipitates out of the air, forming a fine mist of water droplets. clouds in which the cloud development is driven by solar heating.

The It forms when the temperature a sufficiently cool surface. of ice crystals. (or deposition) of water vapor meets supersaturation conditions (that is, convective clouds are formed middle to late morning and become more extensive It is more common on a clear night with On the basis of altitude, clouds are categorized into four classes: For aviation purposes, the criterion for fog is 10



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