Climatic characteristics in hot summer season

The climate characteristics in summer are as follows:

The temperature is very high and the heat is unbearable.

Summer solar term is the hottest solar term in a year. During this period, the temperature usually exceeds 30 degrees Celsius or above 35 degrees Celsius ... some central and southern regions are as high as 40 or even higher. At this time, the sky is clear and the sun is strong, and people will feel hot outdoors. In such a climate, the water consumption of human beings will also increase, and it is necessary to replenish water from time to time.

The flood season is not over yet, but the climate is sultry.

Although the summer heat is a high temperature period in summer, it still rains cats and dogs in some places, and the humidity is relatively high. In some places, the weather is sultry. In this climate, people will feel increased respiratory resistance, and the skin is prone to eczema and other uncomfortable symptoms. At this time, we should also pay attention to perspiration to avoid excessive accumulation of heat and cause heatstroke and other diseases.

Introduction of 24 solar terms:

Twenty-four solar terms are special festivals in the calendar to express the change of natural rhythm and establish "December architecture", which contains a long cultural connotation and historical accumulation and is an important part of the long history and culture of the Chinese nation. Four years old, three months in spring, summer, autumn and winter, two solar terms each month, each solar term has its own unique meaning.

Twenty-four solar terms accurately reflect the change of natural rhythm and play an extremely important role in people's daily life. It is not only a seasonal system that guides agricultural production, but also a folk system that contains rich folk customs. "Twenty-four solar terms" is the product of ancient farming civilization. It is a knowledge system formed by ancient ancestors following the farming season and observing the movement of celestial bodies to understand the changing laws of seasons, climate and phenology in a year.

The twenty-four solar terms were originally formulated according to the changes of stars. The Big Dipper rotates in cycles, and bucket handle rotates clockwise once, which is called one year old (Figure). The current "twenty-four solar terms" are formulated according to the position of the sun on the return to the ecliptic, that is, the annual movement track of the sun is divided into 24 equal parts, each 15 is 1, and each 1 is a solar term, starting in beginning of spring and ending in severe cold.

Through historical development, the lunar calendar absorbed the solar terms of the dry calendar as a supplement to the calendar, and adjusted it to conform to the tropic year through the leap method, forming a combined calendar of yin and yang, and the "twenty-four solar terms" became an important part of the lunar calendar. In the field of international meteorology, the 24 solar terms are considered as the fifth invention of China. 2016165438+1October 30th, 24 solar terms were officially listed in UNESCO's Representative List of Intangible Cultural Heritage of Humanity.