Traditional Culture Encyclopedia - Weather inquiry - Significance of wind direction sign
Significance of wind direction sign
A weather vane is usually used to indicate the wind and direction on a weather map. Weather maps are divided into ground maps and high-altitude maps. Generally speaking, our daily wind is the wind on the ground map.
Wind direction: expressed by vector poles, that is, F mentioned by LZ, indicating the direction of the wind. The direction of the wind direction is based on the longitude and latitude lines on the map. That is to say, if a person gets a weather map, he will make the latitude horizontal, up north and down south. After observing the wind vane, the vertical direction of F points to the direction of wind blowing.
Represented by wind vector, it consists of wind stems and wind plumes. Wind stalk:? Point out the direction of the wind, there are eight directions. Feng Yu:? Strong winds are represented by 3 or 4 short strokes and triangles, perpendicular to the right side of the wind pole end (northern hemisphere).
Extended data wind speed is the forward speed of the wind. The greater the air pressure difference between two adjacent places, the faster the air flow, the greater the wind speed and the greater the wind force. Therefore, the magnitude of wind is usually expressed by wind power. The unit of wind speed is meters per second or kilometers per hour.
When releasing the weather forecast, the formula is "from all the way to nine, all levels are multiplied by two." It means: from 1 to 9 winds, multiply each level by 2, and you can roughly get the maximum wind speed. For example, the maximum speed of the first wind is 2 meters per second, the second wind is 4 meters per second, the third wind is 6 meters per second, and so on.
There are transitional figures between different levels of wind, such as1-2m per second for the first level wind, 2-4m per second for the second level wind and 4-6m per second for the third level wind. By analogy, wind power can be converted into corresponding wind speed, that is, the distance that air flows in unit time, in meters per second.
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