High temperature weather handwritten newspaper

Weather refers to the specific state of the atmosphere near the surface in a short period of time. Weather phenomenon refers to various natural phenomena in the atmosphere, that is, the comprehensive expression of the spatial distribution of various meteorological elements in the atmosphere (such as temperature, pressure, humidity, wind, clouds, fog, rain, flash, snow, frost, thunder, hail, haze, etc.). ) in an instant.

Weather process is the process of weather phenomena changing with time in a certain area. All kinds of weather systems have certain time and space scales, and they are intertwined and influence each other. The combination of many weather systems constitutes a large-scale weather situation and hemispheric and even global atmospheric circulation. The weather system is always in the process of rebirth, development and extinction, and there are corresponding weather phenomena in different development stages.

High temperature means higher temperature. In different situations, the specific value is different, for example, in some technologies, it refers to thousands of degrees Celsius or even more; The highest daily temperature in meteorology in China is above 35℃, which is called high temperature weather. High temperature weather will have a serious impact on human health, transportation, water and electricity consumption. High temperature warning signals are generally divided into three levels, namely yellow, orange and red.

The formation of high temperature is often inseparable from a specific weather system, one of which is the legendary subtropical high. In the area controlled by subtropical high, downdraft prevails. On the one hand, air sinking will compress and heat up, on the other hand, it is not conducive to the formation of clouds and rainfall, so high temperature weather with cloudy weather prevails in high pressure. In addition to natural factors, the formation of high temperature weather is also influenced by human activities. Under the climate background of global warming caused by the increase of greenhouse gases emitted by human beings, the frequency of extreme high temperature heat waves is also increasing.