什么是陸地龍卷風?

什么是陸地龍卷風?

There are several types of well-known tornadoes — waterspouts, snowspouts and supercell tornadoes come to mind — but the landspout is unique because it borders the line between a full-blown tornado and a dust devil.

眾所周知，龍卷風有幾種類型——水龍卷風、雪龍卷風和超級單體龍卷風——但陸地龍卷風是獨一無二的，因為它位于全面爆發(fā)的龍卷風和塵暴之間。

A meteorologist named Howard B. Bluestein dubbed these twisters landspouts in 1985.

1985年，一位名叫霍華德·B·布魯斯坦的氣象學家將這些龍卷風命名為“陸地龍卷風”。

Their formation and overall look resemble a waterspout, except that they form on land or on a surface where winds are converging.

它們的形成和整體上看起來像一個水柱，除了它們是在陸地上或風匯聚的地方形成的。

These types of tornadoes have flat bases and a fluffy, cotton-like appearance. They ofter appear thin and rope-like.

這些類型的龍卷風有扁平的底座和蓬松的棉花狀外觀，它們常常顯得又瘦又像繩子。

Unlike a tornado formed by supercell thunderstorms, a landspout can form without any signs of a thunderstorm. Even more interesting, not all landspouts are visible.

與超級單體雷暴形成的龍卷風不同，陸地龍卷風可以在沒有任何雷暴跡象的情況下形成，更有趣的是，并不是所有的陸地龍卷風都是可見的。

Another simple way to explain how a landspout differs from a normal tornado: landspouts are formed from the bottom up in an updraft, whereas normal tornadoes funnel from the sky down to the surface.

另一種簡單的方法來解釋陸地龍卷風和普通龍卷風的不同之處:在上升氣流中，陸地龍卷風從底部向上形成，而普通龍卷風則從天空向下進入地表。

Landspouts tend to last 15 minutes or less. They can cause damage but their winds aren't nearly as powerful as those of a supercell tornado.

陸地龍卷風一般持續(xù)15分鐘或更短。它們可以造成破壞，但它們的風力遠不如超級單體龍卷風那么強勁。

They are particularly hard to forecast, as Doppler weather radar can't detect them.

它們尤其難以預測，因為多普勒天氣雷達無法探測到它們。

You're most likely to experience a landspout in the spring or summer months, but they can occur in any month.

你最有可能在春季或夏季經(jīng)歷一次陸地龍卷風，但它們其實可以發(fā)生在任何月份。

The National Weather Service will often refer to this type of tornado as a "dust tube tornado."

美國國家氣象局經(jīng)常將這種龍卷風稱為“沙塵管龍卷風”。

If you ever encounter one, be sure to stay away from windows. While they aren't quite as powerful as a normal tornado, their winds can shatter windows or damage possessions.

如果你遇到這種情況，一定要遠離窗戶，雖然它們不像普通龍卷風那么強大，但它們的風力可以震碎窗戶或損壞財物。