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就全国范围而言,今年夏天的气温普遍高于往年,是又一个持续高温的夏季。特别是华北、西北、东北地区的一些城市,连续高温气候几十年不遇。可是,在这些特别炎热的夏日里,不少地方却发生了天降冰雹成灾的现象。云层中的水汽冷凝成水珠降落于大地,这便是雨;如果天气寒冷,云层中的水汽冷凝成一片片六角形的冰晶降落于大地,这便是雪。同样是降水,由于气温的不同,夏天下雨,冬天下雪,这是顺理成章的事情,然而在炎夏酷暑中却下起了比雪花冷凝得更大更结实的冰雹,这是为什么呢?
On a nationwide scale, the temperature in this summer is generally higher than in previous years, and it is yet another summer with a sustained high temperature. Especially in some cities in North China, Northwest China and Northeast China, the continuous high-temperature climate does not happen for decades. However, in these particularly hot summer days, there were many places where the occurrence of a hail disaster has taken a toll on. The water vapor in the clouds condenses into drops of water landing on the earth, which is rain. If the weather is cold, the water in the clouds condenses into pieces of hexagonal ice crystals that land on the earth. This is snow. The same is precipitation, because of the different temperatures, the summer rains, winter snow, this is a matter of course, but in the summer heat but has played down more than the snow condensation more solid hail, which is why?