Several typhoons last year

Since 20021,20 typhoons have been generated in the northwest Pacific Ocean and the South China Sea, among which 5 have landed in China, with the characteristics of less generation and landing, weak intensity, concentrated generation and strong mass occurrence, and more typhoons have affected the South China Sea and Hainan. Fireworks was the strongest typhoon that landed in China in 20021year. The average landing intensity of typhoon in 202 1 year (29.4m/s) is weaker than that in 10 (31.3m/s), but stronger than that in normal years (28.2m/s).

In addition, the impact of long-distance typhoons on heavy rains in China also needs attention. In July this year, due to the combined effect of typhoon fireworks and subtropical high, the strongest rainfall process occurred in Henan Province since the "July 8" rainstorm, causing heavy casualties and property losses.

1.202 1 year Typhoon situation and characteristics in the northwest Pacific and South China Sea

In 20021year, typhoons in the northwest Pacific and South China Sea showed the characteristics of less landfall, weak intensity, concentrated generation and strong mass occurrence, which affected many typhoons in the South China Sea and Hainan.

Among them, the typhoons that landed in China were Fireworks No.6, Chapaka No.7, lupit No.9, Lion Mountain No.0/7 and Compass No.0/8. In addition, Typhoon No.4 "Xiong" landed in China with tropical depression intensity.

Typhoon generation and landing are less, which is the least in recent 10 years. As of165438+1October 18, there were 20 typhoons in the northwest Pacific Ocean and South China Sea in 20021year, which was 5.9 fewer than that in normal years (1980-20 10). Five typhoons landed in China this year, less than usual.

The landing intensity in recent 10 years is weak, but it is stronger than that in the previous period. As of June165438+1October 18, five typhoons landed in China on 202 1, with an average landing intensity of 29.4m/s, compared with June10 (31.

Typhoon generation is centralized and mass-produced. Only seven of the 20 typhoons appeared in the form of a single typhoon, and all other typhoons appeared in the form of a double typhoon or a triple typhoon, including two dances of three winds (lupit, Yinhe and Nida, Lion Mountain, Compass and Nanchuan), with an average of about 65,438 such incidents every year. The typhoon generation time is concentrated in July-65438+10, and there are * * 16 typhoons, accounting for 80% of the annual total.

There are many typhoons affecting the South China Sea and Hainan, and typhoon precipitation can effectively alleviate the drought. In 20021year, six typhoons affected the South China Sea and Hainan Island, and two of them landed in Hainan Island in 10. Affected by it, the precipitation in Hainan, south-central Guangdong and south-western Guangxi in June was 1 ~ 2 times more than normal, and the local precipitation was 3 ~ 4 times more. Typhoon precipitation effectively alleviated the drought in South China, increased the water storage of reservoirs and ponds, and laid a good foundation for water use in autumn and winter.

Fireworks landed on 202 1 the strongest typhoon affecting China. On July 25th and 26th, Typhoon No.6 "Fireworks" landed in Zhejiang Province twice, becoming the first typhoon to land in Zhejiang Province twice since 1949. Fireworks landed northward and stayed on land for 95 hours, making it the longest typhoon on land since 1949. * * * Affected 14 provinces (autonomous regions and municipalities). Due to the slow movement and large accumulated rainfall, the average rainfall in Zhejiang Province reached 1, 9 1 mm, which broke the record of the largest rainfall of landing typhoons in Zhejiang Province. The rainfall in Dingjiafan, Dalan Town, Yuyao City, Zhejiang Province reached 1034 mm, which became the new extreme value of typhoon rainfall in Zhejiang Province.

Second, the average intensity of typhoons that landed in China in recent 10 years was significantly higher than before, with more typhoons going northward and more typhoon disasters at sea.

The intensity of typhoons that landed in China in recent 10 years is obviously stronger than before. According to statistical analysis, the average intensity of typhoons that landed in China in recent 10 years (201-2020) is 3 1.3m/s, which is higher than that in normal years (1980-20 10. Among them, among the strongest 10 typhoons that landed in China since the founding of New China, there were 4 in recent 10 years and 6 in recent 20 years.

Second, the number of typhoons going northward has increased significantly, and agriculture in Northeast China and Shandong Province has been greatly affected. In the past 10 years, the impact of typhoons heading north has increased. * * There are 10 typhoons affecting Northeast China. Just after the autumn of 2020, three typhoons ("Bawei", "Meishak" and "Poseidon") continuously affected the northeast region. Strong winds and rainfall caused crops in Heilongjiang, Jilin and other places to fall in a large area, which is in a critical period for the formation of autumn grain output.

From 2065438 to 2008, Shandong Province was affected by six typhoons in succession. Among them, the northern typhoon "Wambia" brought rare and extremely heavy rainfall to Shandong Province, causing serious waterlogging in Shandong Province, large-scale lodging of crops and serious damage to vegetable base facilities. 2065438+August 2009, Shandong Province was once again affected by the northward typhoon "Lichima". In addition, after "Lichima" landed in Zhejiang, it successively affected nine provinces (cities) in eastern China, causing serious economic losses.

Third, offshore typhoons have a great impact and coastal fisheries have suffered heavy losses. According to the statistics of China Fishery Statistical Yearbook, in the past 10 years, the cages (fish rafts) caused by typhoons have been damaged by about 315,000 boxes annually, with losses of several billion yuan and more than 900 shipwrecks. Among them, in 20 16, affected by eight landing typhoons, 568,000 boxes of coastal cages (fishing rafts) were damaged, and more than 900 fishing boats sank in16.

In 20 13, Typhoon Butterfly (No.21) rapidly developed from a tropical storm level to a strong typhoon level, moving from east to west, crossing the Xisha Islands with strong typhoon intensity, and the wind power in the waters near the Xisha Islands reached 10 ~ 14. Heavy rain to heavy rain generally occurred in Sansha Island Reef, causing many ships to sink and people to die and disappear.

Fourth, a long-distance typhoon triggered an extreme rainstorm in Central China. Previous studies have shown that about 14.7% of tropical cyclones at sea interact with mid-latitude weather systems, and long-distance (land-based) rainstorm events will occur, half of which last for more than 2 days. In July this year, due to the interaction between typhoon fireworks and subtropical high, water vapor at sea was continuously transported to Henan, which led to the strongest rainfall process since the "July 8" rainstorm in Henan, causing heavy casualties and property losses.

Typhoon naming:

202/KOOC-0/Typhoon Du Fu, English name: Dujuan, No.2/KOOC-0/0/KOOC-0/,name from China, meaning: a flower;

202 1 No.2 typhoon Shu Liji, English name: Surigae, number: 2 102, name from North Korea, meaning: an eagle;

202 1 No.3 typhoon Cai Yun, English name: Choi-wan, No.2103, the name comes from Hongkong, China, which means: clouds in the sky;

202 1 No.4 typhoon bear, English name: Koguma, No.2104, whose name comes from Japan, meaning Ursa minor;

202/KOOC-0/Typhoon Qiangpi, English name: Champi,No.: 2/KOOC-0/05, name from Laos, meaning: a flower;

Typhoon Fireworks 202 1 No.6, English name: In-Fa, No.2106, the name comes from Macau, China, which means: fireworks;

202 1 No.7 Typhoon Chapaka, English name: Cempaka, No.2107, name from Malaysia, meaning: a plant famous for its fragrant flowers;

Typhoon Nibert No.8 in 20021year, English name Nepartak, No.2108, Micronesia meaning: famous warrior;

Typhoon Lupit, 202 1, English name Lupit, No.2109, Filipino meaning: cruel;

Typhoon YinheNo. 10 in 20021year, with English name Mirinae and No.2 1 10, which means Yinhe in Korean;

Typhoon Nida 1 1 in 20021,English name Nida, No.211,Thai meaning: Mrs.' s name;

No. 12 typhoon Omais 202 1, English name Omais, number 2 1 12, which means roaming;

Typhoon Kang Sen, 202 1, English name Hong Kong Xin Business, No.2 1 13, Vietnamese meaning: historic site;

202/KOOC-0/No./KOOC-0/4 Typhoon Chandu, English name Chanthu, No.2/KOOC-0//KOOC-0/4, a flower in Cambodia;

Typhoon Dian Mu (No.202 15), English name Dian Mu, No.2115, named after China, the legendary god of thunder and lightning;

Typhoon DandelionNo. 16 in 20 16, English name Mindulle, No.2 1 16, North Korea, meaning Little Yellow Flower;

Typhoon Lion MountainNo. 17 in 20021year, English name Lionrock, No.2 1 17, the symbol of Hong Kong;

No. 18 of Typhoon Compass 202 1, English name Kompasu, No.2 1 18, Japanese meaning: compass constellation;

/KOOC-0/9 Typhoon Nanchuan 202/KOOC-0/,English name Namtheun, 2/KOOC-0//KOOC-0/9, the name of a river in Laos;

Typhoon agate No.2021,English name Malou, No.2120, name from Macau, agate is a kind of jade;

Typhoon Niyatu No.265438 in 2002/KOOC-0/year, English name Nyatoh, No.2/KOOC-0/2/KOOC-0/,from Malaysia, which means: a tree;

Typhoon Rey No.22 in 20021year, English name Rai, No.2122, Shikoku, Yap Island, Micronesia;

Typhoon Marka No.23 202 1, English name Malaks, No.2123, which means strong in Filipino;

No.24 typhoon catfish 202 1, English name Megi, No.2124, the name comes from Korea, the name of a fish;

202/KOOC-0/Typhoon Siam, English name Chaba, No.2/KOOC-0/25, tropical flower in Thailand;

No.26 typhoon Avery 202 1, English name Aere, No.2126, American storm name.

202 1 No.27 Typhoon Sanda, English name Songda, No.2127, which means: a river in the northwest of Vietnam;

202 1 Typhoon Tracy, English name Trases, No.2128, source: Cambodia, which means: woodpecker;

202/KOOC-0/No.29 Typhoon Mulan, pinyin: Mulan, No.2/KOOC-0/No.29, the name comes from China, which means: a flower originated in China.