请输入您要查询的百科知识:

 

词条 red sprites and blue jets
释义
red sprites and blue jets
meteorology
flashes of light that occur above thunderstorms (thunderstorm) and that are associated with normal lightning in the thundercloud below.
The causes of both phenomena are not known. Red sprites tend to form almost instantaneously over a broad region between 40 and 90 km (about 25 to 55 miles) in altitude. This region spans most of the mesosphere, the region of the atmosphere between about 50 and 80 km (30 and 50 miles) in altitude and which overlaps much of the ionospheric D region (between 70 and 90 km, or approximately 40 and 55 miles in altitude). Red sprites have a reddish colour on low-light television records, and blue tendrils have been observed trailing beneath them. Blue jets propagate out of the tops of thunderclouds at surprisingly low velocities (roughly 100 km, or 60 miles, per second) in the form of narrow cones of light that are blue in colour. Both phenomena are the subject of active research.
随便看

 

百科全书收录100133条中英文百科知识,基本涵盖了大多数领域的百科知识,是一部内容开放、自由的电子版百科全书。

 

Copyright © 2004-2023 Newdu.com All Rights Reserved
更新时间:2025/4/5 22:08:36