“航迹云”也称“飞机尾迹”、“飞机尾迹云”、“机尾云”或“飞机拉烟”(不是飞行表演的拉烟),是喷气式飞机在高空飞行时所产生的特有的现象。
这团痕迹可能是飞机或火箭飞上高空后留下的航迹云。
A contrail is the visible vapor trail behind airplanes or rockets traveling at high altitudes.
图片中显示出的水库宽度大约为8千米(5英里),一架从上方飞过的飞机在水库两岸之间留下了一条航迹云。
The width of the reservoir illustrated here is approximately 8 kilometers (5 miles); a jet flying over the reservoir left a contrail midway between the shorelines.
对航迹云的现场研究一直是很稀少的。威斯康星大学白水分校的戴维·崔维斯说,我们所了解到的大部分对航迹云的研究都是基于模型研究的。
Field studies of contrails are rare, says David Travis of the University of Wisconsin-Whitewater. Most of our understanding of their effects is based on model studies.
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