- 行业: Weather
- Number of terms: 60695
- Number of blossaries: 0
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The American Meteorological Society promotes the development and dissemination of information and education on the atmospheric and related oceanic and hydrologic sciences and the advancement of their professional applications. Founded in 1919, AMS has a membership of more than 14,000 professionals, ...
雾形成水汽添加到比水汽的来源 ； 多冷的空气中时最常见的是当非常寒冷的空气漂移跨相对较温暖的水。无论什么性质的水汽来源 （暖水、 工业燃烧排气，呼），其平衡蒸气压力大于该对应的较冷的空气 ；因此，水汽在成为混合在一起并由在寒冷的空气，冷却后迅速凝结。应该指出的是这一机制从未允许雾实际上达到水汽来源。而且，进一步混合充分湍流或对流流 （仅有轻微的程度，需要） 中，完成后的雾粒子蒸发在更多或更少井定义雾的上限。此外需要注意的是虽然空气对流有必要产生蒸汽雾，它与不同大大在通常的意义上，是由暖湿空气移过冷的表面造成平流雾。寒冷的秋天早晨，以及极地地区，通常在湖泊和溪流蒸汽雾观察到。它有时混淆与冰雾，但它的粒子是完全液体。在温度低于 −29 ° C (− 20 ° F)，这些可能会冻结成 droxtals，创建一种类型的可称为霜烟的冰雾。
Industry:Weather
An ice crystal usually having an aspect ratio greater than 2 and as much as 100 and with hexagonal symmetry, although trigonal (threefold) and occasionally other symmetries occur. As such crystals fall through the clouds in which they form, they may encounter conditions causing them to develop dendritic extensions, that is, become plane-dendritic crystals.
Industry:Weather
One of the semipermanent highs of the subtropical high pressure belt. These highs appear as centers of action on mean charts of sea level pressure, generally between 20° and 40° latitude. They lie over the oceans and are best developed in the summer season. See Azores high, Bermuda high, Pacific high.
Industry:Weather
The change with time in the concentration of a reactant or product involved in a chemical reaction. The rate of the reaction is given by the product of the rate coefficient for the particular reaction and the concentrations of the reactants.
Industry:Weather
A term for pressure, temperature, and specific volume; other thermodynamic quantities that depend on these or other variables are often referred to as thermodynamic functions of state. In this sense, the equation of state specifies the relation among the state variables.
Industry:Weather
A temperature scale with the ice point at 32° and the boiling point of water at 212°. Conversion with the centigrade temperature scale (°C) is accomplished by the formula: °F = (9/5)°C + 32. Compare Celsius temperature scale.
Industry:Weather
An algorithm to compute rapidly the digital form of the discrete Fourier transform. The procedure requires that the length of the data series undergoing transformation be an integral power of two, which is often achieved by truncating the series or extending it with zeros. More flexible mixed-radix algorithms have been developed that allow data series of any length. They gain efficiency as the prime factors of the length become small, and they are equivalent to the FFT when the data series length is a power of two.
Industry:Weather
