论文部分内容阅读
2008年1月份,我国遭受了大范围的雨雪影响,自北向南分别为雪、冻雨、雨3种降水形式,这3种降水形式分别是因为其不同的温度、湿度环境所影响而形成的。其中,冻雨因为其影响范围之大、造成损失严重而成为一个令人关注的焦点。冻雨究竟是什么呢?冻雨既非固态的降水又不同于一般水滴,而是一种过冷却水滴(温度低于0℃),它在温度略低于0℃的空气中能够保持过冷状态,其外观同一般雨滴相同,当它落到温度为0℃以下的物体上时,立刻冻结成外表光滑而透明的冰层。在我国南方特别是西南地区,冻雨并非一种罕见的天气现象。它是冷暖气团交汇并达到特定的气温条件时所形成的一种特别的降水形式,当较强的冷空气南下遇到暖湿气流时,冷空气重而暖空气轻,所以冷空气位于暖空气之下形成锋
In January 2008, China suffered from a wide range of rain and snow. From north to south, there were three forms of precipitation: snow, freezing rain, and rain. These three kinds of precipitation were formed due to the effects of different temperatures and humidity environments. . Among them, frozen rain has become a focus of concern due to its large scope of impact and serious losses. What is frozen rain? Freezing rain is neither solid precipitation nor general water droplets. It is a kind of supercooled water droplets (below 0°C). It can maintain supercooled air in a temperature slightly lower than 0°C. Its appearance is the same as that of a normal raindrop. When it falls on an object whose temperature is below 0°C, it immediately freezes into a smooth, transparent layer of ice. In the south of China, especially in the southwest, freezing rain is not a rare weather phenomenon. It is a special type of precipitation formed when the air-cooled mass meets and reaches a certain temperature condition. When a strong cold air encounters a warm and humid air flow south, the cold air is heavy and the warm air is light, so the cold air is located in the warm air. Formation front