A visual feast in winter! Please keep the national rime viewing map to see the best viewing periods in various places.
China Weather Network News In winter, if you want to encounter the fairy tale world of "Frozen", in addition to looking forward to snow, admiring rime has also become the choice of many people. Rime is neither ice nor snow, neither flowers nor fog. It is a visual feast in winter. At present, many places in my country have entered the best viewing period for rime. What are the good places to see rime? What special conditions are needed for the formation of rime? China Weather Network has specially launched a national rime viewing map to help you get to know the most beautiful rime and feel the temperature of ice and snow.
Many places in my country have entered the best viewing period for rime, and can be viewed from both the north and the south.
On December 1, a large area of rime appeared in Altay, Xinjiang. (Picture/Wu Xiaoming)
Rime can be viewed in both north and south of my country. It can be formed as long as there are supercooled water droplets in the fog and meet a certain temperature. It is very common in the neighboring areas with higher humidity in the north. , also relatively common in southern alpine areas.
In areas with long winters in the north, Northeast China, Inner Mongolia and Xinjiang, you can enjoy rime for a longer time. Aershan in Xing'an League, Inner Mongolia, has a rime belt of more than 50 kilometers long, known as the "Hundred-mile Rime Corridor in the Greater Khingan Mountains". The seven-month ice and snow period provides natural protection for the rime landscape; Jilin is a holy place for rime appreciation. There are many. Rime Island and the banks of the Songhua River are famous rime viewing spots. The rime in the Changbai Mountain Demon Realm Scenic Area is more mysterious than ordinary rime viewing spots due to the larger fog.
In the south, Tianmen Mountain and Hengshan Mountain in Hunan, Huangshan Mountain in Anhui Province and Mount Emei Mountain in Sichuan are all excellent places for viewing rime. Among them, Mount Emei has the longest viewing period for rime, with an average of more than 140 rime days per year.
The forms of rime are granular and crystalline. Wang Weiyue, a meteorological analyst at the China Weather Network, said that granular rime is formed when supercooled fog droplets are blown by the wind over a slender object and quickly freeze in contact with the object. Wind plays a key role in its formation process; while crystalline rime It is mainly the condensation process of water vapor in low temperature environment, which requires the environment to be lower than -15.
Are all the trees hanging rime? I can’t tell the difference between rime and rain.
People often confuse rime and rain. Wang Weiyue said that there is actually a difference between the two. Rime is formed under natural conditions of low temperature and large water vapor. The ornamental landscape is a natural "air humidifier", providing sufficient moisture for overwintering crops; while smog is the product of freezing rain. The ice hanging formed often bends wires and trees, causing power outages, tree lodging and other disasters. It is a kind of disastrous weather.
Data picture: Rainstorms appeared in Guizhou in 2018, and the ice crystal trees seemed to "quickly freeze" the plants. (Photo/Luo Dafu)
Yusong is the product of freezing rain. It is the ice crystals, tree hangings and other landscapes formed after the freezing rain process. The formation of freezing rain also requires specific meteorological conditions. The temperature of precipitation is lower in the atmosphere above 4000 meters, and the phase is ice crystals and snowflakes. However, when passing through the atmosphere between 2000 meters and 4000 meters, it encounters a warm layer with a temperature higher than 0, and precipitation It turns into the phase state of water droplets, and then enters the cold layer again before landing, but it is too late to freeze and becomes supercooled water droplets. When it lands, it comes into contact with cold objects, and the surrounding environment is lower than 0, thus forming ice crystal tree hangings.
The area with the most freezing rain and smog in my country is Guizhou, followed by Hunan, Hubei, Henan and other places. In the north, rainstorms are also more common in Shandong, Hebei, Liaodong Peninsula, Shaanxi and Gansu. Among them, there are more mountainous areas than plains, and the highest number of mountains.
Once rainstorm occurs, timely measures must be taken to clean up tree hangings covering trees and power lines. People should go out as little as possible to prevent tree hangings from high places from falling and injuring people.
Tips for viewing rime in winter. Please put it away in the morning as the best time to take pictures
Since the environment for viewing rime is very cold, it is recommended that friends who watch rime wear a down jacket, a hat, gloves, and a scarf. Don’t miss anything; also bring a baby warmer, a thermos cup and other warm-keeping gadgets; in addition, the sun’s reflectivity is high in the snow, so it’s best to wear sunglasses when enjoying the scenery.
In addition to enjoying the scenery, there are also techniques for photographing rime. First of all, rime usually appears about 2 hours after sunrise. Morning is an excellent time to shoot rime. Secondly, you need to choose the correct light position. When shooting rime, you generally don’t use a smooth-light environment. You often shoot rime as gray-white. In order to get the best results, Rime pictures with rich layers and strong texture should be taken with side lighting, side backlighting or backlighting. In addition, since the temperature in the rime viewing environment is generally below freezing point, after shooting, the camera should be sealed in a sealed bag before entering the room. Pay attention to keeping the camera warm to avoid damage to the camera due to condensation on components caused by the large temperature difference between indoor and outdoor.
(Text/Jiang Yi Data support/Wang Weiyue design/Luo Jiaxue)