Zhu Kezhen, a famous meteorologist in China, roughly divided the climate change in China in the past 5000 years into four warm periods and four cold periods:
The first cold period: The cold period of the Western Zhou Dynasty was the first cold period in China in 5,000 years, which lasted for 200 years.
"Mencius? , speaking of featuring cutting weeks? Get rid of weapons, leopards, rhinos and elephants? In fact, these animals were not driven away by people, but withdrew from the Yellow River Basin in droves because of the weather.
The second cold period: the cold period of Wei, Jin, Southern and Northern Dynasties (from the beginning of AD to AD 600)
The average annual temperature in the cold period of Wei, Jin, Southern and Northern Dynasties may be about 1℃ ~ 2℃ lower than it is now.
The third cold period: the Southern Song Dynasty cold period.
During this period, the cold reached a new height: heavy snow fell in September in the north, plum trees in North China could not grow, Taihu Lake11/froze, all oranges in Tingshan of Dongting Lake froze to death, and the Suzhou section of the Beijing-Hangzhou Grand Canal often froze.
The fourth cold period: the cold period of Ming and Qing dynasties
The average annual temperature in Beijing in the Ming Dynasty was about 3 degrees Celsius lower than it is now, and the winter temperature in the southeast coastal areas in the early Qing Dynasty may be about 7 degrees Celsius lower than it is now.
It can be seen that the ancient people's heating methods keep pace with the times with the different cold periods. China began to use utensils to burn charcoal for heating in the Spring and Autumn Period. For example, in extremely cold weather, use heatable adobe sleeping platform, firewall and bamboo fire cage to keep warm.
Of course, there are also rich and poor ways of heating. If the family is rich, the heating method is coal-fired heating. Being poor at home is just like "selling charcoal Weng": he wears thin clothes, but he is worried that charcoal can't be sold, hoping it will be colder. ?
Architects of ancient palaces adopted more scientific methods to heat the palaces. Like making the walls of the palace hollow? Sandwich wall? Also known as? Firewall? . A fire tunnel is dug under the fire wall, and a charcoal burner is set under the corridor outside the palace. Burn the charcoal mouth with charcoal, and the heat can warm all the way along the wall to the whole palace hall. At the same time, there is an air hole at the end of the fire channel, and the flue gas is discharged from the air outlet below the platform, so that the thermal cycle is smooth. At the same time, this kind of fire path also goes straight to the emperor's imperial bed and under the kang bed where others sleep in the palace, thus forming? Warm kang? With what? Nuange? Keep the whole palace warm.
Can ordinary families be ancient? Air-conditioned room? Pepper room Pepper room is to paint the walls with pepper and mud, which can keep the palace warm and fragrant. The pepper house has a firewall to keep warm.
Cotton was planted on a large scale in the Song Dynasty. People can keep warm with clothes made of cotton cloth, and ordinary people also use silk and flax as the main raw materials for bedding and winter clothes. Rich people can also use furs made from animal skins such as sheep, rabbits, foxes, otters and minks, also called furs, to keep warm.
In order to keep warm, the ancients would choose to eat some healthy food to supplement energy in winter. In the choice of food, they will choose something warm, such as eating ginger, mutton and dog meat to keep warm. Besides eating, Chu people also drink to keep warm. For example, in the cold northern region, people like to drink hard liquor to keep warm in winter.