The influence of cold wave on people's production and life
Cold wave, that is, a large range of cold air moves southward strongly, just like tides, causing severe cooling and strong winds along the way. The passage of the cold wave gives people the deepest impression, and it seems that it will be associated with disastrous weather when it is talked about. The cold it brings brings rain and rime, which affects power supply, communication, transportation and industrial and agricultural production. It also brings strong winds, which may cause people's lives and property losses. However, the benefits of the cold wave to human beings are rarely mentioned. Snowfall brought by cold wave in winter is beneficial to agriculture. "Xue Rui heralds a bumper harvest year" and the amount of frost froze insects on the ground. People call it "no frost in October, no chaff in the mortar" In addition, the cold wave and strong wind can use their strong winds to generate electricity, and the cold wave is also a huge "machine" for heat exchange on the earth. Because of this, nature's ecology can be balanced.
Influence of Cold Wave on Agricultural Production
Adverse effects of cold wave on agricultural production: the arrival of cold wave brings strong cooling and frost, which is very unfavorable to overwintering crops; Low temperature freezing injury may freeze crops to death, leading to agricultural production reduction in the coming year; Strong winds and freezing rain will damage trees (fruit trees) and affect the fruit yield in the coming year; Blizzard covered the grassland and collapsed the shed, causing a large number of cattle and sheep to die due to insufficient forage and freezing, leading to the decline of animal husbandry. The favorable influence of cold wave on agricultural production: cold wave and low temperature can freeze some pests and diseases, and reduce the pests and diseases of crops in the coming year; Reduce infectious diseases in livestock; Snowfall has a certain protective effect on overwintering crops; In the coming year, the snow will melt into valuable water resources to alleviate the spring drought. Cold wave is a kind of disastrous weather in winter, and people are used to calling it cold wave. The so-called cold wave is a weather process in which cold air from the north invades China on a large scale, resulting in a large-scale sharp cooling and northerly winds. According to the regulations of China's meteorological department, if the temperature drop caused by cold air intrusion reaches more than 10℃ and the lowest temperature is lower than 5℃ in one day, it is called a cold wave process.
Cold crit! 16 provincial capital cities recorded low temperatures.
At present, the impact of the third cold wave this winter is still going on. Today (165438+1October 22nd), the windy and cool weather was pushed to South China, and the temperature in Guangdong and Fujian was halved. The highest temperature in Jiangsu and Zhejiang is only about 10℃. However, the lowest temperature of this round of cold wave has not yet arrived, and tomorrow will be the real cold "crit". China Weather Network has released the latest national frozen map to see how cold it will be when you go out tomorrow morning. In the past weekend, the cold wave gradually moved eastward and southward, and its influence quickly spread to the whole country. During the day yesterday, strong winds roared in North China, Huanghuai and other places, and some areas experienced floating dust or sand blowing. Today, the cooling brought by the cold wave reached South China, and the temperature was halved. The warmth of yesterday afternoon will disappear. Yesterday, Meizhou, Maoming and other places were close to 30℃, and today it is only about 15℃. Tomorrow morning, the temperature in the central and eastern regions will hit a new low, and the weather will be colder than the last cold wave.
What weather will the cold wave cause?
Cold wave and strong cold air usually bring strong winds and cool weather, which is the main disastrous weather in winter in China. Cold waves and strong winds are a great threat to coastal areas, such as the cold wave on April 2 1 ~ 25, 1969. Strong winds hit the Bohai Sea, the Yellow Sea and Hebei, Shandong, Henan and other provinces, with land winds of 7 ~ 8 and offshore winds of 8 ~ 10. At this time, it was the astronomical tide, and the outbreak of cold wave caused the rare storm surge in Bohai Bay and Laizhou Bay for decades. On the northern shore of Shandong Province, the sea water rose by more than 3 meters, washed away the seawall by more than 50 kilometers, and the sea water flowed backwards for 30 ~ 40 kilometers.