It’s snowing again. Let’s talk about snow

2022-06-08 0 By

Snow is precipitation that falls on the ground in solid form because of the level of appearance.In the sky, the upward water vapor is gradually saturated in the low temperature environment.And then I ran into something called a nucleus.Condensation nuclei are unemployed people suspended in the air, like particles of sea salt.Then the two of them cuddle together to form a crystal nucleus, which is the beginning of snow.Snowflakes fall when they are larger than 50 microns in diameter.Most snowflakes melt as rain on their way to the ground. The air near the ground must be cold enough for snowflakes to fall to the ground as snow.Therefore, snow is not what the audience wants to see, and whether it can snow depends on many factors.Artificial snowfall involves spraying various types of condensation nuclei, such as dry ice particles, into saturated air.There are also many parts of the world where the temperature is very low and there is no snow all year round because it is dry.Take the Dry Valleys of Antarctica, which are thought to be the most Mars-like place in the world.Because ice molecules are more hexagonal, crystal nuclei grow to form hexagonal snow flakes.Hexagonal flakes of snow change at different humidity and temperature, forming all kinds of snowflakes.At high latitudes and polar regions, where temperatures are very low, snowflakes are columnar.Where the weather is extremely cold, snow is like loose diamond powder.When the temperature is below -30 degrees, it becomes an icicle snowflake.When the temperature is close to zero, snowflakes like to huddle and fall.Therefore, the snow is not a symbol of cold, and rarely appears in late winter, generally in late autumn and early spring.Fresh snow has a 95% reflectivity to sunlight, so most snow we see is white.Going out in the snow for long periods of time without sunglasses is the equivalent of staring at the sun and can cause blindness.To take advantage of this rule, snow is spread with black soil to reduce reflectivity and speed up snow surface melting.In some cases, the snow can also be pink due to the growth of certain algae. It is also said to taste like watermelon, which is also called watermelon snow.Snowflakes are very light, with 5,000 to 10,000 snowflakes weighing just 1 gram.Twenty-five centimeters of fresh snow, that’s about two and a half millimeters of snow.The scale of snowfall is based on the amount of snow that falls within 24 hours: 0.1 to 2.4 millimeters as light snow, 2.5 to 4.9 millimeters as moderate snow, 5 to 9.9 millimeters as heavy snow, and more than 10 millimeters as snow.Most snowfall in the world occurs at high latitudes and elevations.98% of the world’s seasonal snow cover is in the northern hemisphere.Eurasia continent is the northern hemisphere snow heavy household, snow area of the northern Hemisphere snow area of more than 60%.Snow centers in China are located in the eastern part of the Tibetan Plateau, the northern part of the northeast, and the Tianshan Mountains in Xinjiang.Urumqi snow days more than 40 days, Qingdao more than 30 days.Because the entry permit can not come down, the capital may only be 1-5 days.Most areas south of the Yangtze River have occasional snow, and even Guangdong and Hainan have no snow all year round.When dry, cold air blows over a large lake or offshore, it warms and wets, creating a luxurious snow belt along the shore or shore.This is called the Great Lake effect.The great Salt Lake and the eastern shore of the Great Lakes have seen snow.Buffalo and Syracuse, near the Great Lakes, have the most snow in the United States.Syracuse is directly known as The City of Syracuse. When it snows, universities close and students often go a winter without a chance to see their teachers.The cold air moved over the Sea of Japan, carrying water vapor ashore and creating a snowfield in Hokkaido, Japan.Sapporo, a city in Hokkaido, has seven months of snow a year, with an average annual snowfall of 595 mm, making it the snowiest major city in the world (population of more than one million).The same lake effect, cold air carrying water vapor from the Bohai Sea also brought a lot of snow to the northern shandong Peninsula of China.Yantai and Weihai are known as snow dens, where people can sweat under the snow in winter.Fresh snow contains a lot of air, which can keep the crops warm and help them survive the winter.Water from the melting snow stays in the soil, which is conducive to spring sowing. China has always said that a good snow promises a good harvest.Many animals hibernate in snow caves because of the thermal insulation.In outdoor sports such as hiking, people also dig snow caves for camping in bad weather.The arctic natives, over thousands of years, have adapted to life in the snow.The Inuit, who lived in the snow for a long time, created igloos, which are still cold inside, but their hard-core constitution should be able to survive the winter.Modeled after igloos, the Finns built ice hotels for tourists.We don’t even have a bath facility, and we can’t book more than 3,000 RMB per night for years.The Sami people of northern Europe can measure the depth of snow with the naked eye to see if they can graze.Snowshoes were also invented, and the original sunglasses were made in the snow.Sleds, snowmobiles and other efficient mobility tools.Tourists from many countries around the world can experience sledding, pulled by reindeer or dogs, which is the difference between a rickshaw and a motor vehicle.The dogs pull sleds so fast that every time you brake, they turn around and look at you in disgust — the dance of snow in the clouds, the laughter of the ice carnival, the rustling joy of the dreary winter.Whether in the warm south, or the frozen north, may this joy be shared with you ~