[ti:Why Fewer Typhoons Are Hitting Taiwan, Philippines]
[00:00.04]Weather experts say Taiwan and the Philippines have experienced fewer typhoons in recent years.
[00:10.88]The reduced storm activity may be be the result of higher water temperatures
[00:17.40]and changes in upper-atmosphere winds.
[00:22.84]Taiwan, which sits in the western Pacific, normally gets hit hard
[00:29.24]by three to four typhoons each year between the months of June and October.
[00:37.68]Each storm can kill five to 10 people and can cause major damage.
[00:45.48]Taiwan's neighbor to the south, the Philippines, can get up to 20 typhoons per year.
[00:54.24]The storms bring winds strong enough to blow down trees, and rainfall that can quickly turn streets into rivers.
[01:04.60]They usually cause mass evacuations and widespread transportation problems.
[01:13.24]The systems are called cyclones and hurricanes in other parts of the world.
[01:21.08]For the past three years, Taiwan and the Philippines have missed their historical average typhoon counts.
[01:31.20]Weather officials say one of the main reasons for this is higher water temperatures
[01:37.47]in the mid-Pacific, where such storms form.
[01:42.88]In addition, wind directions have changed in the upper-atmosphere
[01:48.21]and are blowing more typhoons to the north.
[01:53.32]Jason Nicholls is an international weather expert with U.S.-based forecasting company AccuWeather.
[02:03.28]Nicholls told VOA that weather officials have seen a general warming of waters
[02:09.79]in the Indian Ocean and in the Pacific in recent years.
[02:16.48]Nicholls added that ocean temperatures in the central and eastern Pacific Ocean have been warming up since 2017.
[02:27.24]He said this caused typhoons to form in areas to the north and east of Taiwan and the Philippines.
[02:37.16]Upper-atmosphere winds pushed the storms north.
[02:42.28]Most of this year's 21 typhoons in Asia moved north to reach Japan, South Korea and China.
[02:52.76]The most severe, Typhoon Hagibis, killed 80 people in eastern Japan earlier this month.
[03:03.04]Western Pacific waters have been somewhat cooler this year, Nicholls said.
[03:09.76]This means fewer storms have formed near the eastern coasts of Taiwan or the Philippines.
[03:18.56]Asia's deadliest storms each year often reach the Philippines,
[03:23.80]including 2013's super-typhoon that killed 6,340 people.
[03:32.96]So far this year, no major typhoons have hit the country.
[03:37.88]It has experienced weaker tropical storms, however.
[03:44.08]Chen Meng-shih is a forecaster with Taiwan's Central Weather Bureau.
[03:51.44]He told VOA more northward-moving typhoons are likely to continue
[03:57.68]as long as "Pacific Ocean high pressure is weak and higher north."
[04:04.68]Many scientists have blamed rising ocean temperatures in the Pacific and Atlantic
[04:11.08]on a combination of natural conditions and man-made climate change.
[04:18.56]Man-made causes include the burning of coal, oil and gas.
[04:26.00]I'm Bryan Lynn. 更多聽力請訪問51VOA.COM