暴風雪如何形成??急急急!!!(15分)

怎麼暴風雪形式？How Do Blizzards Form?

有三個要求，為了讓暴雪形成： There are three requirements in order for a blizzard to form:

there must be cold air present in the atmosphere必須有冷空氣，目前在大氣中
there must be enough moisture in the atmosphere for clouds to form必須有足夠的水分在大氣中雲層形成
there must be warm air in updrafts which can lead to precipitation必須有暖空氣在向上之排氣, 這可能會導致降水
Only when these three factors are present can a blizzard be created.只有當這三個因素都在場，才能暴雪的良好風氣。

一步一
The first step in the formation of any blizzard is that cold air must be present.第一步是在開拓任何暴雪，寒冷的空氣必須在場。 Warm air should start to flow over it.暖空氣應開始流過它。 This first step can occur when winds pull cold air towards the equator and away from the North or South poles.這第一步可發生時，風勢拉冷空氣走向赤道，遠離北方或南方極點。 This pulling motion will also bring warm air in the direction of the poles and away from the equator.這個拉力議案，同時亦會帶來的暖空氣中的方向兩極並遠離赤道。 As the warm air from the equator is brought into contact with the cold air from the poles, a weather phenomenon called a "front" is formed; clouds begin to take shape, gaining more and more moisture, which will eventually be released as snow.由於暖空氣從赤道帶來的是接觸到寒冷的空氣從波蘭人，天氣現象稱為"戰線" ，是形成;雲層開始形成，得到了越來越多的水分，這將最終被釋放的積雪。

第二步
As the moisture is added to the clouds, it starts to form into water vapor which is a mixture of gaseous water and liquid water.由於水分被添加到雲層，它從形成水汽，這是一種混合氣態水和液態水。 Generally, blizzards that are high intensity are formed near some sort of body of water.一般而言，這次雪災是高強度，是附近形成某種形式的水體。 Bodies of water such as lakes and rivers are excellent sources of moisture for a blizzard and can lead to some very large snowstorms.水體如湖泊和河流都是極好來源濕度為暴雪，並可能導致一些非常大的暴風雪。 As the blowing winds associated with a front pick up more and more water, the storm strengthens and the blizzard becomes a much more formidable force of nature than a simple snowstorm.由於吹風與前拿起越來越多的水，風暴加強了與暴雪成為一個更為艱鉅的自然的力量，比一個簡單的雪災。

第三步
Most storms with large amounts of water built up will simply cause torrential rainfall.最風浪與大量的水建立起來的根本原因暴雨。 A blizzard releases its moisture in the form of snow. 1暴雪發布其水分在形式上積雪。 This is because of the third necessary requirement for a blizzard, cold air near the ground.這是因為第三必然要求，為暴雪，冷空氣靠近地面。 As the water vapor begins to clump together to form small particles of ice, the particles begin to fall to the ground.由於水汽開始叢在一起，形成小顆粒的冰，顆粒開始下降至地面。 In a rainstorm, the ice particles will thaw and become raindrops.在暴雨中，冰粒子將完全融化，成為雨滴。 In a blizzard however, because of the below freezing temperatures near the ground, the ice will not thaw and will instead stay frozen as they hit the ground in the form of snow, sleet, or hail.在一個暴風雪，但由於該零度以下的氣溫近地面，冰不會融化，反而會留下凍結，因為他們撞到地面的形式，雪，雨夾雪，或冰雹。

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暴风雪，-5℃以下大降水量天气的统称，且伴有强烈的冷空气气流。

暴风雪的形成类似于与暴风雨相似。在冬天，当云中的温度变得很低时，使云中的小水滴结冻。当这些结冻的小水滴撞到其他的小水滴时，这些小水滴就变成了雪。当它们变成雪之后，它们会继续与其他小水滴或雪相撞。当这些雪变得太大时，它们就会往下落。大多数雪是无害的，但当风速达到每小时56千米，温度降到-5℃以下，并有大量的雪时，暴风雪便形成了。

A blizzard is a severe winter storm condition characterized by low temperatures, strong winds, and heavy blowing snow. Blizzards are formed when a high pressure system, also known as a ridge, interacts with a low pressure system; this results in the advection of air from the high pressure zone into the low pressure area. The term blizzard is sometimes misused by news media to describe a large winter storm that does not actually satisfy official blizzard criteria.