I. Explanation of nouns 1. Weather:

Weather refers to the specific state of the near-surface atmosphere in a short 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.

Comfort index is an index that integrates the comprehensive influence of meteorological factors such as temperature, humidity and wind on human body, indicating whether human body is comfortable in the atmospheric environment, suggesting that people can adjust their physiology according to the change of weather, adapt to the cold and warm environment, and prevent sudden changes in weather, so as to facilitate people to understand the comfort degree of their bodies in changeable weather and prevent diseases caused by human discomfort caused by certain weather. Comfort index is divided into 9 grades. The higher the grade, the greater the influence of meteorological conditions on human comfort, and the worse the comfort.