Two and a half months before the hurricane season ends, there is only one name left in the naming list.

Cctv news(Reporter Xu Yeqing) The Atlantic hurricane season in 2020 is so active that the conventional names of tropical storms are almost exhausted. On September 14th, local time, the National Hurricane Center issued the warning of five tropical cyclones over the Atlantic Basin, which was the same as that recorded in September 1971.

The World Meteorological Organization has a nomenclature table that is recycled every six years, assigning 21 names to each Atlantic hurricane season. Teddy and Vicky, named after Sally, are the 19th and 20th tropical storms that disturb the Atlantic Ocean. At present, only one name "wilfred" is available on this list.

The World Meteorological Organization said that if the names in the list are exhausted, the extra storms will be named in Greek letters.

The last time the Greek alphabet was used for naming was in 2005 — — There were 27 storms. Greek letters used by scientists in those days: Alpha, Beta, Gamma, Delta, Epsilon, etc.

Popular science: How to name a hurricane?

In the early 20th century, Australian forecaster Clement Wragge first named typhoons.

In 1945, the northwest Pacific was officially named after a hurricane. In 1979, male names were officially included.

In 1997, at the 30th annual meeting of the Typhoon Committee of ESCAP/WMO, it was suggested that a commonly recognized naming system should be established to improve the warning effectiveness.

According to the World Meteorological Organization, because tropical cyclones will last for a week or more, there may be multiple cyclones at the same time, so naming hurricanes (tropical cyclones) can help people quickly identify storms in warning messages and avoid confusion.

It is understood that the names of tropical cyclones are arranged in alphabetical order, and the names of women and men appear alternately, and the list is used every six years. Therefore, the 2019 list will be used again in 2025.

In general, the named table is stable. However, once a hurricane has caused particularly serious disasters or casualties, in order to prevent it from having the same name as future hurricanes, members of the Committee may apply to delete it from the list of names, that is, leave the name for this hurricane forever, and the vacant name will be recommended again by the original providing country or region.

Interpretation: There may be a correlation between global warming and storm intensity.

For this year’s unusually active Atlantic hurricane season, Dennis Feltgen, spokesman and meteorologist of the National Hurricane Research Center of the United States, said in an interview with The New York Times: "We have experienced 20 named storms, but the hurricane season has just passed about half, and there are still two and a half months to go."

Feltgen called the Atlantic hurricane season "extremely active" in 2020. In the past hurricane season, there were only 12 named storms on average, and two of them would be upgraded to hurricanes. The National Oceanic and Atmospheric Administration of the United States predicted in May that the Atlantic Ocean will usher in an extraordinary hurricane season this year. There may be 19 named storms, and at least 10 will turn into hurricanes.

In recent decades, researchers have found that the activity of storms in the North Atlantic has increased, which is reflected in its intensity, frequency and duration. Some experts believe that there is a correlation between global warming and storm intensity. When the ocean temperature rises, the warm water will make the storm stronger and may escalate into a hurricane. This is because warm air will carry more water vapor and make the storm stronger.

Review: Typhoon that seriously affected China in recent years and was removed from the list.

Image source: China Meteorological News Agency