The wind rose. Soon rain fell in torrents.
天上刮起了大风,接着下起了暴雨。
单词 | wind rose | ||
释义 |
wind rose
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维基共享资源中相关的多媒体资源:风玫瑰图 |
A wind rose is a graphic tool used by meteorologists to give a succinct view of how wind speed and direction are typically distributed at a particular location. Historically, wind roses were predecessors of the compass rose (found on maps), as there was no differentiation between a cardinal direction and the wind which blew from such a direction. Using a polar coordinate system of gridding, the frequency of winds over a time period is plotted by wind direction, with color bands showing wind speed ranges. The direction of the longest spoke shows the wind direction with the greatest frequency.
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