寒潮是一股强冷气流,一旦袭来,常常是风向突变,风速增大,气压上升,温度一天内急剧下降10摄氏度以上,同时还可能下雨、下雪。寒潮是我国境内常见的一种灾害性天气,每年冬天发生的次数较多,活动范围广大。这么多的寒潮都是从哪里来的呢?侵入我国的寒潮,都发育在北方。这些地区,冬 The cold wave is a strong cold air flow. Once it hits, it is often a sudden change in wind direction. The wind speed increases and the air pressure rises. The temperature drops sharply by more than 10 degrees Celsius in one day, and it may rain or snow. Cold wave is a common type of disastrous weather in China. It occurs frequently in winter and has a wide range of activities. Where did so many cold waves come from? The cold waves that invaded our country all developed in the north. In these areas, winter