How small raindrops are formed, how small raindrops are formed

Rain is a natural precipitation phenomenon that is produced by disturbances in the atmospheric cycle, is an indispensable part of the Earth's water cycle, and is the only way for almost all terrestrial plants far from rivers to replenish fresh water. Next, I will share with you the formation and characteristics of rain for reference.

Introduction to how rain is formed.

1. Causes of the formation of rain.

1) Frontal rain (rainy season): The warm and humid air flow from the ocean meets the cold air from the land, because the cold air is heavy and the warm air is light, the warm and humid air flow is forced to rise, and when it condenses, it forms a very long and wide rain band, which is the front rain.

2) Convective rain: In summer, under the strong sunlight, the warm and humid air in the local area rises sharply, and condenses to form rainfall, which is convective rain, which is called "thundershower" in meteorology, and we usually call it "bursting sky", in addition, typhoon rain is also a kind of convective rain.

3) Topographic rain: The warm and humid air currents from the ocean, when they encounter mountains, are forced to rise, and when they meet condensation, they form rainfall.

4) Typhoon rain: Hot and humid air over the tropical ocean rotates and rises strongly on a large scale. During the rise, the temperature drops rapidly, and a large amount of water vapor condenses into clouds and rain, which is called typhoon rain.

2. Frontal rain characteristics.

The first characteristic of frontal precipitation is that it has a large horizontal range, and often forms a wide range of precipitation areas with a belt-like distribution along the front, which is called a precipitation zone. As the mean position of the front shifts seasonally, so does the position of the precipitation band; Another characteristic of frontal precipitation is that it lasts for a long time, because the rise rate of stratiform clouds is small, the water content and precipitation intensity are relatively small, and some pure water clouds rarely experience precipitation, and precipitation occurs also drizzle.

3. Convective rain characteristics.

Convective precipitation is produced under unstable atmospheric conditions, mostly in the hot summer afternoons. Its horizontal scale is very small, usually within kilometers, and the precipitation lasts for a short time, usually tens of minutes, forming showers, often called showers; Changes in precipitation intensity. Convective precipitation is often accompanied by thunderstorms (lightning and thunder) that become thundershowers.

Features of 4 wind and rain.

The water vapor in the typhoon area is sufficient, the upward movement is strong, the precipitation is often very large, and the average daily precipitation is more than 800 mm when the typhoon arrives, and the intensity is very large, and most of them are gusts. Landfall of typhoons often produces torrential rainfall, ranging from 200 to 300 mm and more than 1000 mm.

5 characteristics of terrain rain.

Topographic rain tends to increase with the height of the terrain. Terrain rain is generally not very strong if it is not combined with convective rain or cyclonic rain. In general, precipitation tends to be higher in mountainous areas than in neighbouring plains, and more precipitation on the windward side than on the leeward side.

The distribution of rainfall on the windward slope first increases with the increase of altitude, and then decreases with the increase of altitude after reaching the maximum precipitation altitude.

How rain is formed, the process by which raindrops are formed.

When the sun heats the ground, some of the water in the rivers, lakes and seas becomes water vapor and rises into the air, and the water vapor becomes clouds in the air, and the clouds rise again, and because it is too cold and the air cannot hold it, it becomes rain and falls.

How light raindrops are formed is naturally caused by the exchange of warm air and hot air.

Rain can occur in a variety of ways, from drizzle to continuous rain and downpour showers. When water on Earth is irradiated by sunlight, it becomes water vapor and evaporates into the air. When water vapour meets cold air at high altitude, it condenses into small water droplets.

These small droplets are small, with a diameter of only millimeters and a maximum of millimeters. They are small and light, held in the air by updrafts in the air. It was these small droplets of water that gathered together in the air to form clouds.

For these small droplets to fall to the ground as raindrops, they would have to increase in size by more than 1 million times. It mainly relies on two means, one of which is condensation and condensation increase. The second is to rely on the collision and increase of cloud droplets.

In the early stages of raindrop formation, cloud droplets mainly rely on the continuous absorption of water vapor around the cloud body to condense and condense themselves. If the water and gas energy sources in the cloud are constantly replenished and the surface of the cloud droplets is often supersaturated, then this condensation process will continue, causing the cloud droplets to grow and become raindrops.

However, sometimes the amount of water vapor in the cloud is limited, and in the same cloud, the water vapor is often in short supply, so that it is impossible to make each cloud drop increase into a larger raindrop, and some smaller cloud droplets have to be merged into the larger cloud droplets. If water droplets and ice crystals coexist in the cloud, the process of condensation and bloom increase will be greatly accelerated.

When the droplets in the cloud increase to a certain extent, due to the increasing size and weight of the large droplets, they will not only catch up with the slower small droplets in the process of descending, but will also "swallow" more small droplets and make themselves stronger. When the large cloud droplets grow larger and larger, and finally the air can no longer support them, they fall straight from the clouds to the ground, becoming our common rain.

We already know that clouds are made up of many small water droplets and Xiaoice crystals, and that raindrops and snowflakes grow and grow larger. So, how do small water droplets and Xiaoice crystals grow and grow in the cloud?

In a water cloud, the cloud droplets are all small droplets. They are mainly increased by continuing to condense and colliding with each other. Therefore, in a water cloud, for the cloud droplet to increase to the size of a raindrop, the cloud first needs to be very thick, dense, and watery, so that it can continue to condense and grow; Secondly, there needs to be a strong vertical motion in the water cloud, so as to increase the chance of multiple collisions and merging.

In the thinner and more stable water clouds, the cloud droplets do not have enough opportunity to condense and merge and grow, and can only cause cloudy, cloudy skies, and little rain.

The distribution of the size of the cloud droplets varies from one cloud to another, and the reason for the uneven size of the cloud droplets is the transfer of water vapor in the surrounding air and the evaporation of the cloud droplets. The factors that make the cloud droplets grow are the condensation process and the collision merger process, in the case of only condensation, the size of the cloud droplets is uniform, but due to the replenishment of water vapor, some cloud droplets grow, plus the result of the merger, the larger cloud droplets continue to grow and become larger into raindrops. Raindrops fall by gravity, and when there is an updraft, an upward force is applied to the raindrops, slowing them down, and some small raindrops may be carried up.

Only when the raindrops increase to a certain extent can they descend to the ground and form rainfall.

How rain is formed, the process by which raindrops are formed.

When the air temperature decreases, the water vapor and the dust in the air condense together, and when the buoyancy of the air cannot support the gravity of the water, it will fall to form small raindrops.

In layman's terms, it is the process by which warm air meets cold air, and water vapor in the atmosphere condenses into water! Where the cold and warm air meet, there is a front, which is most likely to form rain!

Formed by the liquefaction of water vapor and exothermy.

Moist air contains water vapor, when the moist air rises and is cold, the water vapor condenses into fine water droplets suspended in the sky and gathers together to form clouds, and the small water droplets in the clouds continue to collide and increase in the movement such as tumbling up and down, and when they increase to the point that they cannot be suspended, small raindrops are formed.

In layman's terms, it is the process by which warm air meets cold air, and water vapor in the atmosphere condenses into water! Where the cold and warm air meet, there is a front, which is most likely to form rain!

Water vapor in the air, when it encounters cold air, liquefies into small water droplets. (The raindrops) gather bigger and bigger, and when they fall, it's rain.

Gathered together by clouds and then turned into rain.

How rain is formed, the process by which raindrops are formed.

It is related to the wetting ridge and thickness of the seepage layer, the strength of the rising motion, the air temperature at high altitude and near the surface, the number of condensation nuclei, the wind speed and wind direction, etc. Satisfied.

Formation of raindrops.

Clouds made up of liquid water droplets, including supercooled water droplets, are called hydrogenic clouds. If there are conditions for the cloud droplets to increase into raindrops and make the raindrops have a certain rate of decline, then it is rain or drizzle that falls.

, that is, the water evaporates to form water vapor, and the water vapor is cold, condenses, falls to the ground, and forms rain. If you take a closer look at the roof, the water will fall down to a certain extent, and this process is the process of rain.