cause
If the cold and warm air conflict violently, it will produce heavy rainfall; However, if the airflow suddenly pulls the low-level cumulonimbus clouds containing ice crystals or snowflakes to the ground, there will be a spectacle of snowflakes flying in a small area in a short time. Beijing's "Six In the snow" belongs to the latter.
The direct cause of "six in the snow" is mostly strong cold advection in summer. For example, 1980 Moscow's "six in the snow" was caused by the invasion of cold current in northern Scandinavia. Recently, some experts believe that the occurrence of "Six In the snow" is related to solar activity, ocean current changes, volcanic eruptions and other factors that can lead to climate anomalies.
report
southern hemisphere
It will snow in Australia in summer! Silver Christmas Report: It's summer in Australia in the southern hemisphere, but it's snowing! In recent days, the climate in Australia has suddenly changed. The temperature dropped from more than twenty or thirty degrees Celsius in the previous two days to minus one degree today, and it was still snowing, which made Australians taste the silver Christmas for the first time. Two months before it snowed, the weather was "very hot, reaching 40℃, and forest fires were everywhere." The burning area in Victoria Province is over 40,000 square kilometers. Firefighters all over the country are exhausted and one person is burned to death. "
Northern Hemisphere
"The weather changes in Chengde Bashang, and it snows in July of the lunar calendar" reported that on September 8 and 9, 2006 (Lunar leap month 16, 17 and 16 are white dew), heavy snow generally fell in Weichang County and Bashang area of Fengning County, Chengde District, Hebei Province. Among them, the deepest snowfall in the paddock reached 30 cm, which was the earliest large-scale snowfall since the county had meteorological records.
"Six In the snow in Hami, Xinjiang, East Tianshan Mountain Wrapped in Silver" reports: World Environment Day, from June 5, 2006, light snow suddenly fell along the Tianshan Mountain in Barkun, Hami, Xinjiang, making the East Tianshan Mountain, which had just been dyed green, wrapped in silver again. Snowfall in East Tianshan Mountain in June is very rare.
Residents marvel at Shenzhen's "Eight In the snow", which experts call the "Moon". Report: In the first five days of beginning of autumn in 2006, it rained heavily for more than ten minutes at about 5 pm on August 2nd of Gregorian calendar. Resident Li took a ten-minute "Snow Video".
"It snows in Nanjing in July, and experts express surprise that it snows unheard of in summer" reports that Qinhuai District, Nanjing, one of the four major stoves in China, experienced a few minutes of snow after a gust of wind at about 12: 50 on July 30, the seventh day after the summer heat in 2005, and the weather after the snow was heavy rain and hail.
"Wonderful, surprise! Report: On the way to Jiuzhaigou in June 2005, the Dongguan tour group encountered heavy snow while staying in Songpan County. The next day, when visiting the colorful pool in Jiuzhaigou, they liked the snow flying all over the sky.
"A few days ago, there was a sudden In the snow in Fuzhou, and experts explained its magical causes." Report: On the sixth day after the slight summer heat in 2005-at 4 pm in July of Gregorian calendar 13, it snowed for one minute after the gale, then it rained for one minute, and then it turned into a rainstorm.
"Five In the snow: Snow Float in Mentougou, Beijing on the 5th" reported that in the summer of 2005, snow fell in some areas of Mentougou, Beijing on May 5th.
"Heavy Snow in July in Jiang 'an, Sichuan" reported that in the summer of 2004, at about 8: 0018, a heavy snow suddenly fell for about 5 minutes within one kilometer of the school circle of Baizhuhai Center in Renhe Township, Jiang 'an County, Sichuan Province.
The Spectacle of Flying Snow in June in Linzi, Shandong Province reported that on the sixth day after the great summer heat in 2002, timely snow fell over Linzi City, Shandong Province from 3 pm to 3: 20 pm.
On July 28th, 2002, the activity "Notes on Environmental Protection in Hoh Xil: Snow Flying in Zhuonaihu Tibetan Antelope Aggregation Tibetan Antelope Group in July" was held in Zhuonaihu Tibetan Antelope Aggregation Tibetan Antelope Group in Hoh Xil District, Tibet.
It snowed in June in Baluntai, Xinjiang, and there was no snowstorm for 30 years. It was reported that it snowed for two consecutive days in Baluntai District in the north of Hejing County, Xinjiang from 6: 00 on June 17, 2002, and the deepest snow depth reached 50 to 80 cm, resulting in 2 16, 2 18 national highways and expressways. But two years ago, China News Service: Six In the snow in Barentai, Xinjiang reported that in mid-June, the sun was blazing all over Xinjiang, and the temperature was as high as 30 degrees. However, there was a rare heavy snow in Chahannur, Baluntai County, Xinjiang. Barentai County is located in the south of Urumqi. As of June 13, the snowfall has lasted for 36 hours, the thickness of snow is more than 40 cm, the temperature has dropped to-15 degrees, and there are 1688 people trapped due to the disaster, including severe disaster10/3 people and livestock 70/kloc-0.
It is reported in Chengdu in April that the sky is abnormal to warn the world: From 8: 30 pm on April 16, 2002, snow fell for more than ten hours in Xiling Snow Mountain, Sichuan, with a thickness of 50 to 60 cm.
"It snowed six times in Shijiazhuang, which is really shocking! Report: On May 30th, the eighth day after 200 1 light summer, a heavy snow suddenly fell in Wuyuezhai, Lingshou County, Hebei Province in the high temperature for several days, and the snow on the ground exceeded one foot.
Thick. 1In June, 1999, it suddenly snowed for more than forty minutes in Beijing.
"Where will it snow in summer" reports: Xinmin Evening News reported that it rained for one minute in the afternoon of August 1987 (the tenth day after beginning of autumn): it rained that afternoon, and the window was white. Many people witnessed the rain, with white flocs, about 2 cm long, about 65438+. It was also reported in the sixth issue of Primary School Science and Technology in 2002.
The sixth report of primary school science and technology in 2002: 1 981June1day, heavy snow fell in Guancenshan forest area of Shanxi Province, with a depth of 25 cm; 1On June 5, 987, there was a heavy snow in Zhangjiakou, Hebei Province, and the minimum temperature dropped to MINUS 7 degrees Celsius.
The last two "Six In the snow", one was on June 20, 2007, when it snowed heavily in Gansu.
Another time was on July 30, when it snowed heavily in Beijing.
In June 2008, it snowed in Pujiang County, Zhejiang Province. The spectacle of flying snow lasted about 5 minutes.
20 1 1 June in the lunar calendar (July in the solar calendar) In Shanghai, it snowed again in June, and netizens took photos one after another.
3 related reports
In the northern hemisphere, Xia Xue is not a specialty of China, such as:
Primary School Science and Technology Report No.6 in 2002: It snowed in Moscow in June, 1980.
"Global climate anomalies, what is" acquired "for human beings? Report: On July 17, 2004, in the mountainous area of Bavaria, Germany, the storm turned into heavy snow, and the highest mountain in Germany soon became a snow-covered mountain, and the temperature dropped sharply. The German meteorological department said it snowed heavily, and the snowfall actually reached 10 cm. At the same time, the local temperature dropped to MINUS 6℃, setting a record for the lowest temperature in July in Germany in 10 years.
"Germany 5 In the snow freezes Togo, Ecuador complains that the host country won before the war" reports that in late May 2006, it rained continuously in southern Germany and it snowed heavily near the Alps. All the buildings are covered with thick "white quilts", and the cold scene is similar to that in winter.
"It's amazing! It snows in Switzerland in June, staring at pure white. Report: In June 2005, it snowed in Saint Moritz, Switzerland.