What does the growth of snowflakes depend on?

In mixed clouds, ice crystals continue to bloom and increase due to the coexistence of ice and water, becoming snowflakes. When the temperature under the clouds drops below 0, snowflakes can fall all the way to the ground and form snowfall. If the temperature under the clouds is above 0, sleet may occur.

There are many shapes of snowflakes, such as stars, columns, sheets, etc., but the basic shape is hexagonal.

The reason why snowflakes are mostly hexagonal and the reason why there are many patterns is because the molecules of ice are hexagonal as the most, for hexagonal flake ice crystals, due to the different curvatures on its surface, edges and corners, they correspondingly have different saturated water vapor pressures, among which the saturated water vapor pressure on the corners is the largest, the second on the edge, and the smallest on the plane. In the case of the same actual water vapor pressure, the condensation growth of ice crystals is also different due to the different saturated water vapor pressures of each part.

For example, when the actual water vapor pressure is only greater than the saturated water vapor pressure of the plane, the water vapor only condenses on the surface, forming columnar snowflakes. When the actual water vapor pressure is greater than the saturated water vapor pressure on the edge, condensation will occur on the edge and on the surface. Because the speed of condensation is also related to the curvature, the condensation is faster in places with large curvature, so the condensation on the edge of the ice crystal is faster than on the surface, and more flakes are formed.

When the actual water vapor pressure is greater than the saturated water vapor pressure on the corner, although there are water vapor condensation on the surface, edge and corner, the position at the sharp corner is prominent, the water vapor ** is the most sufficient, and the condensation grows the fastest, so it forms more branch-like or stellate snowflakes. In addition, the constant movement of ice crystals and the changing temperature and humidity conditions in which they are exposed to them can cause the various parts of the ice crystals to grow at different rates, resulting in a wide variety of snowflakes.

Extended Materials. On Earth, water is constantly circulating, the water in the ocean and the ground is heated and evaporated into the sky, and these water vapors move with the wind to other places, and when they encounter cold air, they form precipitation and return to the earth's surface. There are two types of this precipitation:

One is liquid precipitation, which is rain; The other is solid precipitation, which is snow or hail, etc.

In fact, each snowflake is a small Xiaoice crystal at the beginning, condensed in the water vapor in the atmosphere. However, during the snowflake formation process, due to the influence of temperature, humidity, wind, and other factors, each snowflake has a different growth rate at all times, resulting in a completely different pattern from the previous snowflake. The physicist says he can pinpoint the temperature and humidity of clouds in the sky by looking at the type of snowflakes that fall, whether they are sheets, discs, columns or other shapes.

For example, when a drop of water in a cloud condenses around tiny dust particles, a Xiaoice heart will be produced about 6 -15 below the freezing point of the water, which is the beginning of each snowflake. The core of the ice crystal then begins to trap nearby water vapor molecules, which are frozen on the crystal, allowing the crystal to grow. For half an hour or so, the crystal grows larger until it becomes heavy enough, at which point, no more additional water vapor is captured by it, and the crystal falls from the clouds, which is a snowflake.

Every snowflake is born and grows uniquely. The amount of water vapor in the atmosphere, and the temperature at which the crystals drop as they grow, determine the unique shape of each snowflake. Even snowflakes falling side by side in the same weather system have different appearances.

Brief introduction. Snowflake, a crystal, is the solid precipitation of water vapor in the sky through condensation, the structure changes with the change of temperature, also known as Weiyang flower and Liuchu, a beautiful crystal, it climbs together in a group in the process of falling, and forms snow flakes. The size of a single snowflake is usually between millimeters.

Snowflakes are light, weighing only grams individually. No matter how light and small the snowflake is, how wonderful it is, its crystalline body is a regular hexagonal shape, so the ancients had the saying that "there are more than five flowers of plants and trees, and six snowflakes are alone", and it is recorded in the works of the history of science in the world that it is the earliest to know the hexagonal structure of snowflakes in China.

Snowflakes. Causes of formation.

Xiaoice is changed by the increase of small ice crystals, and the ice molecules are hexagonal for the most, so the formation of snowflakes is mostly hexagonal, and the shape of each snowflake is not exactly the same. The variety of snowflake shapes is closely related to the water vapor conditions at the time of its formation.

For hexagonal flake ice crystals, due to the different degrees of curvature on their surfaces, edges and corners, they correspondingly have different saturated water vapor pressures, among which the saturated water vapor pressure on the corners is the largest, followed by the edges, and the smallest on the plane. In the case of the same water vapor pressure, the condensation growth of ice crystals is also different due to the different saturated water vapor pressures on the surface, edges and corners of ice crystals. If the water vapor in the cloud is not very abundant, the actual water vapor pressure is only greater than the saturated water vapor pressure of the plane, and the water vapor only condenses on the surface, and the formation is a columnar snowflake; If there is a little more water vapor, the actual water vapor pressure is greater than the saturated water vapor pressure on the edge, and the water vapor will condense on the edge and on the surface, because the speed of condensation is also related to the degree of bending, the condensation is faster in places with a large degree of bending, so the condensation on the edge of the ice crystal is faster than that on the surface, and more flakes are formed at this time; If the water vapor in the cloud is very abundant, the actual water vapor pressure is greater than the saturated water vapor pressure on the corner, so that there are water vapor condensation on the surface, on the edge, and on the corner, but the position at the sharp corner is prominent, the water vapor ** is the most sufficient, and the condensation grows the fastest, so it forms more branch-like or star-shaped snowflakes, so it is also known as six out.

In addition, the constant movement of ice crystals and the changing temperature and humidity conditions in which they are exposed make the various parts of the ice crystals grow at different rates, forming a variety of snowflakes.

Snowflake, also known as Weiyang Flower and Liuchu, is a crystalline body that is a solid precipitation of water vapor in the sky through condensation, and its structure changes with the change of temperature. Snowflakes climb together in clumps during the fall process to form snow flakes, the size of a single snowflake is usually between millimeters, the weight of a single is only grams, and its crystals are regularly hexagonal.

"Snowflakes and Plants".

Beautiful snowflakes are winter rain. What it brings to the plant is help, and snowflakes are the friend of the plant.

Winter wheat, for example, is generally sown from mid-to-late September to early October and matures from late May to mid-to-late June of the following year. Winter wheat has to survive the long, cold winter, and it has an indissoluble bond with snowflakes.

"Rainy Snow Trillion Year" is a popular agricultural proverb that means that heavy snow in winter is a harbinger of a good harvest of winter wheat in the coming year. There are three main reasons for this.

First of all, the winter weather is cold, the snow is often not easy to melt, the snow covering the soil is soft, there is a lot of non-flowing air hidden inside, the air does not transfer heat, so it is like covering the winter wheat with a thick quilt, no matter how cold the weather outside, the temperature below will not drop very low. After the cold wave passes, the weather gradually warms up and the snow slowly melts, which not only protects the crops from frost, but also allows the water from the snow melt to seep into the soil, which is beneficial to the growth and development of winter wheat.

The second is to add fertilizer to the soil. Snow contains a lot of nitride. It has been observed that one litre of rain contains about 1.5 milligrams of nitride, while one litre of snow contains 7.5 milligrams of nitride.

When the snow melts, these nitrides are carried into the soil by the melted snow water, which becomes the best fertilizer for winter wheat.

Again a frozen pest. The snow cover insulates the soil, and pests that burrow into the ground for the winter temporarily survive. But when the snow melts, it absorbs a lot of heat from the soil, and then the soil suddenly becomes very cold, and the pests freeze to death.

Snowflakes are also lethal to plants, many plants are attacked by snowfall, the original green branches and leaves lose their true color, from green to yellow, dying, almost dead. But it is the protection of winter snow that keeps the root system alive and the plant revivs in spring. Overall, snow is a friend of plants.

How are snowflakes formed? Snowflakes are formed by the condensation of water vapor in the air. In general, water vapor condenses into water before it freezes. Snowflakes are formed directly from the condensation of water vapor.

What color is a snowflake? It seems, the snowflakes are white. Actually, snow is a crystal of ice, and ice crystals are colorless and transparent. But each side of it resembles a small mirror, and its ability to reflect light is very strong, and it shows white color.

How big are snowflakes? The largest snowflakes are more than 2 mm in diameter. Our common goose feather snow, the kind of snow flakes that seem to be formed by many snowflakes sticking together during the landing process.

How much do snowflakes weigh? Snowflakes are very light, weighing only one gram from 5,000 to 10,000 snowflakes. There are between six billion and eight billion snowflakes in one cubic meter of fresh snow.

What is the shape of a snowflake? Snowflakes come in a wide variety of shapes, and each snowflake is a delicate work of art. By now, it is known that there are 20,000 different patterns of snowflakes. It's basically hexagonal though.

Snowflakes are transformed from cold air to water, and water is the most cold air to change into snowflakes.

Water molecules condense at zero degrees, and when winter comes, if you blow bubbles, they will freeze into a ball of ice flowers, and if you look at it under a microscope, why are snowflakes all six-sided and different shapes?

There is a tree on Shuikou Mountain in Dongkou County, Hunan Province, which is 10 meters high and has a circumference of meters. The leaves are like camphor trees, and they are like poplars. The canopy is more than 10 meters in diameter and has white flowers. Forestry experts say the tree has not yet found its scientific name.

Locals call it "Snowflake Tree". Because it blooms every time it snows in winter, and it blooms several times a year when it snows; The next year it snowed, and it still bloomed.

Why this is so, experts are also working on it.

There is a "snowflake tree" in Shuikou Mountain, Dongkou County, Hunan Province, which is about 10 meters high, with a waist circumference of meters, the leaves resemble a camphor tree, and resembles a poplar tree, the crown diameter is more than 10 meters, and the flowers are white. This tree blooms when it snows in the winter, and it blooms several times during the year when it snows. The reasons for this are yet to be studied.