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“People were dying and we didn’t know why,” Cornman told me. “We didn’t understand the physics of why the planes were crashing.” The deadly gusts were thought to be blowing in from the ocean or from thunderstorms outside the airports. But the danger turned out to be right above them. In the late seventies, researchers at NCAR and the University of Chicago discovered that the crashes were caused by microbursts—sudden, violent downdrafts. In a microburst, a storm cloud dumps cool air and rain straight down, like water from a broken awning. The air spreads horizontally after it lands, so the pilot thinks he’s flying into a headwind at first. He lifts the plane’s nose slightly and decreases the engines’ thrust. Then the downdraft hits, followed by a vicious tailwind, sending the aircraft to the ground.
。业内人士推荐体育直播作为进阶阅读
Composition II with Red, Blue, and Yellow is in the U.S. public domain. It has been since January 1, 2026. No amount of Spanish law or invented “dual copyright” theories changes that.。搜狗输入法下载对此有专业解读
Толщина морского льда в Северном Ледовитом океане, у мыса Челюскин полуострова Таймыр, составила по итогам февраля 145 сантиметров. Об этом сообщает ТАСС со ссылкой на заявление техника-метеоролога первой категории Объединенной гидрометеорологической станции имени Е.К. Федорова Александра Фанталова.