Dalian reappears the wonders of "Hai Hao"

Dalian reappears the wonders of "Hai Hao"

Dalian reappears the wonders of "Hai Hao", which should be called by the people. Meteorology calls it "evaporation fog", which is a weather phenomenon. The appearance of this phenomenon is actually similar to the principle of white water mist in boiling water. Dalian reappears the wonders of "Hai Hao".

Dalian reproduces the wonders of "Haihao" 1 The fog rises on the sea, the distant islands are looming, and seagulls shuttle through the fog, just like a fairyland ... 12 On February 24, the "Haihao" landscape appeared in the waters of Donggang and Fujiazhuang. Experts say that this phenomenon is related to the sudden drop in temperature.

On the morning of February 24, 65438, the reporter came to the seaside of Donggang Business District and saw that the sea was like a cauldron with boiling water, steaming hot ... The whole sea was foggy, seagulls shuttled in the fog, factories and islands in the distance were looming in the fog, and the whole scene was like a fairyland.

During the visit, the reporter found that despite the cold weather, many citizens still went to Donggang seaside to enjoy the scenery. The reporter learned that many citizens come for "Haihao".

"It's really beautiful!" "What a shock!" "I really want to see the scene!" ..... Some netizens posted live videos and photos online, and the rare beauty immediately attracted a large number of netizens to watch and praise.

The reporter learned that on the same day, in the waters of Fujiazhuang, there was also a "Haihao" landscape. Mr. Sun, a winter swimmer, told reporters that in recent years, there have been many "Haihao" landscapes in the waters around Dalian, "which should be related to the sudden drop in temperature."

The reporter learned that in recent years, there have been many wonders of "Hai Hao" in Fujiazhuang, Cao Shi and other sea areas in our city. Liu Yuling, a senior engineer at Dalian Ocean Forecasting Station, said that the phenomenon of "Hai Hao" needs two conditions: temperature difference and condensation. At present, the water temperature in the sea area around Dalian is about 10℃, and the temperature is MINUS ten degrees, with a difference of more than 20 degrees Celsius. The temperature of seawater is higher than that of air. Seawater evaporates into water vapor and condenses quickly when it meets cold air, so there is a phenomenon of "sea Hao".

Dalian reappears the wonders of "Hai Hao" II. The word "Haihao" comes from the report of "steaming" on the sea near Zhangzidao in Dalian at the end of 20151. At that time, the sea temperature difference reached 16- 17℃, there was strong wind, and the temperature was below zero, which was similar to the meteorological conditions and appearances we recently saw in the coastal waters of the island city, so the word "Hai Hao" was used in previous reports. Although it is not clear which department or individual put forward this term, it is obviously to distinguish the common phenomenon of "sea fog"

The folk should call it Haihao, which is called "evaporation fog" in meteorology. It is a weather phenomenon, which usually appears on the water in cold winter. Because of the rapid cooling, the temperature of seawater is still relatively high relative to the air temperature, but the absolute temperature of air is already very low.

At this time, the seawater contains a lot of salt, which will not freeze immediately, but the water vapor evaporated from the surface of the seawater will quickly condense into foggy water droplets or small ice crystals, which will appear in clusters as the airflow rises, forming dense steam.

The appearance of this phenomenon is actually similar to the principle of white water mist in boiling water. When water reaches the boiling point, the temperature of water will gradually be higher than that of air, and it will accelerate the evaporation of water in the pot. However, when the evaporated water vapor enters the air, because the temperature of the air is relatively low, the water vapor will immediately condense into small water droplets and become water vapor, so when the water boils, it will be the same as the wonders of the sea.

For people who live by the sea, "sea fog" is more common, especially in spring and early summer. It is a kind of water vapor condensation because warm and humid air meets cold sea surface, and it is a liquid. "Haihao" refers to a kind of water vapor condensation when cold air meets a relatively warm sea surface. This water vapor may be liquid, solid or a mixture of solid and liquid. Compared with the definition of "sea fog", these two phenomena belong to a kind of water vapor condensation (China) in the upper and lower atmosphere of the ocean, forming a large number of water droplets or ice crystals (or both) accumulation, which reduces the horizontal visibility. Therefore, from this attribute, it can be considered that "Haihao" belongs to a kind of sea fog.

Saunders, an American scholar, made some analysis on evaporation fog in an article in 1 964. He pointed out that when the temperature is below zero, the temperature in the steam fog is extremely low, and there will be quite a lot of frost structures on the outer surface of the fog droplets. At the temperature of -20℃, the evaporation fog completely turns into an ice crystal structure, and the lowest temperature that produces this all-ice structure will increase with the increase of particulate matter in the air. Before the arrival of the cold wave, Qingdao was shrouded in smog from June 5438+1October 4, and the air quality was in a state of moderate and severe pollution. At noon on June+10/October 6, 65438, the wind is stronger, and the northwest wind will input air containing more particles to the sea surface, providing crystal nuclei for water vapor crystallization, which is beneficial to the formation of ice crystal structure at a low temperature of MINUS ten degrees.

Dalian reappears the wonders of "Hai Hao" 3 65438+Dalian morning on February 24th.

Due to the sudden drop in temperature

Strong wind broke out

On the sea surface of Dalian xinghaiwan sea-crossing bridge

The magnificent landscape of "Hai Hao" also appeared.

The sea seems to be boiling.

The air is filled with fog and steam rises.

It's like entering a fairyland.

Ms. Chu, a citizen of Dalian, said that her unit is near Xinghai Bay. When she went to work at 8 o'clock in the morning, she saw a thin layer of fog on the sea near the Xinghai Bay Bridge, which seemed to be "boiling". Gradually, the fog became thicker and thicker, covering the whole sea. The island in the middle of the sea is very spectacular in the fog.

This phenomenon is called "Hai Hao"

"Hai Hao" is a folk name.

Meteorology calls it "evaporation fog".

This is a weather phenomenon.

It usually appears on the water in cold winter.

Under normal circumstances

The formation of the phenomenon of "vast sea"

Three main conditions are required:

One is strong wind.

Second, the sea surface temperature difference is large.

Third, there is a certain amount of fine particles in the air as condensation nuclei.