您现在的位置是:熱點 >>正文
【】
熱點1人已围观
简介Helicopter pilot Jerry Ferguson was cruising through the skies above Phoenix on Monday as thundersto ...
Helicopter pilot Jerry Ferguson was cruising through the skies above Phoenix on Monday as thunderstorms erupted around the desert city.
While filming the weather for a local television station, Ferguson took a picture that ranks among the best photos ever captured of a dangerous meteorological phenomenon known as a microburst.
SEE ALSO:Earth has another record warm month, but the string may be ending (for now)Microbursts occur when a rush of rain cooled air collapses toward the ground from a parent thunderstorm, crashing to the ground and spreading out at speeds above 100 miles per hour.
The microburst in this image, and in a related timelapse video shot by Bryan Snider from the vantage point of Phoenix's Sky Harbor International Airport.
As Angela Fritz of the Capital Weather Gang blogwrote on Tuesday, microbursts "form within the main downdraft of the storm, and are triggered by two main physical processes — the drag that’s created by falling rain and hail, and evaporation."
"When water evaporates it cools the air, which makes it more dense and accelerates the descent," she wrote.

Microbursts are a major hazard for aircraft that are landing or departing an airport at relatively low rates of speed, since such winds can cause significant airspeed fluctuations and even cause a plane to stall and crash.
For example, the crash of Delta Flight 191 in Dallas in 1985 was blamed on a microburst, as was Pam Am flight 759, a Boeing 727, in New Orleans in 1982.
These crashes and others led to the development of radar technology and warning systems that give pilots early warning of such weather conditions.
One of the leading scientists who investigated microbursts and helped lead the way toward these lifesaving systems was Tetsuya (Ted) Fujita, whose subsequent tornado studies led to the development of the Fujita Tornado Damage Scale.
Tags:
转载:欢迎各位朋友分享到网络,但转载请说明文章出处“夫榮妻貴網”。http://new.maomao321.com/news/04d8699909.html
相关文章
5 people Tim Cook calls for advice on running the biggest company in the world
熱點It's only fitting that the leader of the biggest company in the world has a pretty impressive list o ...
【熱點】
阅读更多利物浦主場戰前7無一勝績 安菲爾德竟讓客隊狂歡
熱點利物浦主場戰前7無一勝績 安菲爾德竟讓客隊狂歡_歐冠www.ty42.com 日期:2021-10-31 01:31:00| 評論(已有310300條評論) ...
【熱點】
阅读更多瓜帥英超200場慘遭裏程悲 無鋒陣頑疾又被拿捏死
熱點瓜帥英超200場慘遭裏程悲 無鋒陣頑疾又被拿捏死_曼城www.ty42.com 日期:2021-10-31 01:01:00| 評論(已有310298條評論) ...
【熱點】
阅读更多