Trở về
Fog

Fog

(n)
Anh
fɒɡ
Mỹ
fɑːɡ
Giải nghĩa: A thick cloud of tiny water droplets suspended in the atmosphere at or near the earth's surface which obscures or restricts visibility (to a greater extent than mist; strictly, reducing visibility to below 1 km).
Nghĩa: Sương mù
Không phổ biến
Cách sử dụng từ vựng "Fog" trong câu (ví dụ)

Fog is a visible aerosol consisting of tiny water droplets or ice crystals suspended in the air at or near the Earth's surface.

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Fog can be considered a type of low-lying cloud, usually resembling stratus.

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In turn, fog has affected many human activities, such as shipping, travel, and warfare.

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The term "fog" is typically distinguished from the more generic term "cloud" in that fog is low-lying, and the moisture in the fog is often generated locally.

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By definition, fog reduces visibility to less than 1 kilometre (0.62 mi), whereas mist causes lesser impairment of visibility.

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Fog forms when the difference between air temperature and dew point is less than 2.5 °C (4.5 °F).

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Fog begins to form when water vapor condenses into tiny liquid water droplets that are suspended in the air.

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Fog, like its elevated cousin stratus, is a stable cloud deck which tends to form when a cool, stable air mass is trapped underneath a warm air mass.

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Fog normally occurs at a relative humidity near 100%.

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However, fog can form at lower humidities, and can sometimes fail to form with relative humidity at 100%.

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Fog commonly produces precipitation in the form of drizzle or very light snow.

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Drizzle occurs when the humidity of fog attains 100% and the minute cloud droplets begin to coalesce into larger droplets.

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This can occur when the fog layer is lifted and cooled sufficiently, or when it is forcibly compressed from above by descending air.

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The thickness of a fog layer is largely determined by the altitude of the inversion boundary, which in coastal or oceanic locales is also the top of the marine layer, above which the air mass is warmer and drier.

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