What are the hazards of freezing rain? What are the hazards of freezing rain?

Freezing rain hazards include crushing trees and power poles, interrupting communications and power supply, hindering road and railway traffic, threatening the flight safety of aircraft, increasing the weight of wires after ice on them, shrinking when cold, causing wires to break, and causing communication and transmission interruptions.

Freezing rain is precipitation that consists of a mixture of ice and water that freezes immediately when it collides with an object with a temperature below 0.

Freezing rain occurs mainly in winter and early spring.

The frozen rain landscape is indeed a beautiful landscape that is rare to see in a year, but it is a natural disaster after all, and the damage caused to people is also that estimate. When the wires freeze, they shrink when exposed to cold and the weight of the rain, they will break. Sometimes, rows of power poles are pulled down, disrupting telecommunications and transmission.

Road traffic has been hampered by icy ground, which has led to an increase in traffic accidents. When the field freezes, it can freeze the winter wheat that has returned to green, or freeze the seedlings of crops sown in early spring. In addition, freezing rain can also destroy young forests and frostbitten fruit trees on a large scale.

The thickness of freezing rain can generally reach 10 mm to 20 mm, and the thickest is 30 mm to 40 mm. When freezing rain occurs, the wind is often stronger, so the impact of freezing rain on transportation, especially on communication and transmission lines, is greater. According to the analysis of meteorological experts, freezing rain is a precipitation phenomenon produced under a specific weather background.

During this period, the northwest and southwest airflows over the Yangtze-Huaihe River Basin were very strong, there was cold air intrusion on the ground, and warm airflow over 1500 meters and 3000 meters went northward, and the vertical structure of the atmosphere was cold up and down and warm in the middle, from top to bottom were ice crystal layer, warm layer and cold layer. That is, the atmospheric temperature above 3000 meters is often below -10, at an altitude of about 2000 meters, the atmospheric temperature is generally about 0, and the temperature below 2000 meters is lower than 0. Most of the freezing rain occurred in more than a month from early January to early and mid-February, and the start date was early in the north and late in the south, early in the mountains and late in the plains, and the end date was the opposite.

In the higher mountainous areas, the freezing rain starts early and ends late, and the freezing rain period is slightly longer. For example, at the Guangming Peak of Huangshan Mountain in southern Anhui, the freezing rain generally begins in early November and ends in early April of the following year, which lasts for 5 months. According to statistics, the freezing rain weather in the Jianghuai River basin occurs once in 2 or 3 years along the Huaihe River and once in 7 or 8 years in the south of the Huaihe River.

However, in the mountainous areas, there is a large difference between the valley and the summit, and some valleys in the mountainous areas have almost no freezing rain, while the higher parts of the mountains have freezing rain almost every year. Freezing rain is a kind of disastrous weather, it can crush the power lines and ** lines after a large amount of freezing and accumulation, and severe freezing rain will collapse the house. The aircraft flies over clouds with overcooled water droplets, and the wings and propellers will accumulate water, which will affect the aerodynamic performance of the aircraft and cause serious consequences.

Freezing rain hazards such as crushing trees and power poles, interrupting communications and power supply, hindering road and railway traffic, and threatening the flight safety of aircraft.

Freezing rain is composed of a mixture of ice and water, and it freezes immediately when it collides with an object with a temperature below 0, and it is a kind of disastrous weather seen in early winter or late winter and early spring.

Rain mostly occurs during the winter and early spring periods. Guizhou Province is the area with more freezing rain in China, followed by Hunan Province, Jiangxi Province, Hubei Province, Henan Province, Anhui Province, Jiangsu Province and Shandong Province, Hebei Province, Shaanxi Province, Gansu Province, Liaoning Province and other places, among which there are more mountainous areas than plains, and the most high mountains. Can rain fall from the sky and freeze into harm?

Yes, when this ice accumulates to a certain extent, it is not only harmful, but also harmful.

Freezing rain observations

Freezing rain is observed by the observation station by directly seeing the condensation phenomenon on surface objects, and cannot be observed by weather radar, Doppler or other traditional observation methods; But radar can be used to indirectly predict how likely it is that freezing rain will form.

The intensity of the reflection of the radar signal is related to the radius of the form of precipitation. Although rain reflects a stronger signal than snow, the rain from melting snow is not much stronger than the signal from the previous snow because the radius of the raindrop is much smaller than that of the snowflake.

However, in the airflow layer where the snow is just beginning to melt, the radius of the snowflakes does not change much and water droplets appear on the snowflakes, and the two effects add up, resulting in a very high reflection intensity of the radar signal at this time. Therefore, seeing such a strong reflection signal on the radar screen means that there is a warm air layer over the area and that the snow is melting, and that there is rain or freezing rain in the area. If the surface temperature is lower than the freezing temperature at this time, there is a high chance of freezing rain.

The hazards of freezing rain can be divided into two aspects: on the one hand, transportation, and on the other hand, agriculture.

1. Transportation

A large amount of freezing rain accumulates and freezes, which will overwhelm power poles, not only affect people's normal life and communication, but also affect transportation. Severe freezing rain can lead to severe icing on the road, making it easy for vehicles to slip and causing a high incidence of traffic accidents. In addition, the supercooled rain will affect the wings and propellers of the defeated aircraft, affect the normal flight of the aircraft, and in severe cases, it will also lead to aircraft accidents.

2. Agriculture

Freezing rain falls on plants, and plants will be frostbitten or die, especially some growing seedlings, which are very easy to die in a freezing rain;Fruit trees with large dry fronts can also be frostbitten, affecting their yieldsThe farmland will be frozen, and the seedlings to be plucked will be affected, and the best soil rising period will be missed, which will affect the normal development of the seedlings and cause serious agricultural losses.

Formation of Ice Rain:

Under normal circumstances, when the temperature of rain reaches below freezing, it will turn into ice and form snow, but if the temperature of a certain air layer is high, the ice returns to a liquid state and falls on the ground or an object in a colder state of rain, such a rainfall process is freezing rain. When too much rain falls, a rime is formed.

A natural phenomenon that occurs at the turn of winter and spring, when spring arrives and the cold snap does not recede, the rain falls from the sky and forms ice on the ground, and the rain falls to the ground when the surface temperature is lower than zero degrees Celsius.