1 agriculture
Snowfall may be beneficial to agriculture. For example, there is a proverb in China that "snow will bring good harvest". Snow can be used as a thermal insulation layer to keep the heat of the soil and protect crops from the weather below freezing point.
The water melted by snow remains in the soil, which saves a lot of water for crops and is beneficial to spring ploughing and sowing and the growth and development of crops. Snow contains a large number of nitrides, which are brought to the soil by snowmelt water in the process of snowmelt and become the best fertilizer. Snow can also kill pests and reduce the occurrence of pests. Irrigation of crops with snow water can increase yield and improve quality.
Step 2 entertain
There are many kinds of winter sports and entertainment that depend on snow, such as skiing, snowboarding, snowmobiling, hiking in the snow, snowball fights, making snowmen and so on.
Snow can also be used in snow sculpture. snow sculpture is one of the popular outdoor arts in cold countries. Snow sculpture mainly uses snow as molding material, kneading it into a fixed shape, combining it and trimming the details, which is quite similar to the principle of sand sculpture. Many cities in cold regions hold ice and snow festivals or winter carnivals in winter. Snow sculpture and ice sculptures are important parts of the ice and snow festival.
For example, the Northeast is a developed area in snow sculpture, especially the Sun Island Scenic Area in Harbin holds a grand snow sculpture Art Fair every year. Kemi, a city in northern Finland, builds an ice castle in Kemi every year, attracting tourists from more than 50 countries.
Second, negative.
1, snowstorm
Snowstorm is a natural disaster that causes large-scale snow, snowstorm and avalanche due to snowfall, which seriously affects the survival and health of people and animals, or damages transportation, electricity and communication systems. Snowstorm, as one of the major natural disasters in China, occurs every year, seriously threatening people's lives, property and normal life order. According to the formation conditions, distribution range and manifestations of snow disasters, the types of snow disasters are generally divided into avalanche, wind-blown snow (snowstorm) and snow disasters in pastoral areas.
snow damage
Snow damage is a kind of agro-meteorological disaster, which refers to the damage caused to crops, animal husbandry, forestry production and agricultural facilities in winter by excessive snowfall, thick snow and long snow layer maintenance. Winter snowstorm in grassland animal husbandry is also called "white disaster". Livestock in China, Xinjiang, Inner Mongolia, and grassland pastoral areas of the Soviet Union and Mongolia often starve to death or die of illness due to the "white disaster".
Winter wheat snowstorm mainly occurs in areas and years with deep snow, such as Yili and Tacheng areas in northern Xinjiang, China, agricultural areas in northern Soviet Union and Canada.
Extended data:
Formation of snow
Water vapor in the atmosphere condenses directly or water droplets condense directly, which is snow. It can also be said that it snows when the temperature in the cloud is too low and small water droplets form ice crystals and fall to the ground or snow. Ice absorbs heat when it melts, so the ground temperature will be lower than when it snows.
1, the atmosphere needs to contain cold ice crystal nuclei. ?
2. Sufficient water vapor. Below 3.0℃ (freezing point). If the cold air is quite strong and carries moisture, it can snow at the temperature of 1℃ to 10℃.
Where it can snow: The climate zone belongs to the middle latitude to the high latitude (that is, the area south of the Tropic of Cancer/north of the Tropic of Cancer), and some Zhongshan or plateau with an altitude of more than 2000 meters in the low latitude area will also have the same opportunity.
Ocean airflow will also indirectly affect the probability of snow in this area. If there are more warm currents in high latitudes, it will reduce the chance of snow in this area (such as Honshu to Kyushu, Japan).
References:
Baidu encyclopedia-snow