What do you think of weather fax wave forecast?

The wave forecast chart in meteorological facsimile chart is used to forecast the wave situation. To interpret such a chart, you need to know some basic knowledge about waves.

Ocean wave forecast map usually includes contour line, effective wave height and main wave direction. Isowave height line is a kind of contour line representing ocean fluctuation, and its value represents the height of waves. Effective wave height is the standard deviation of wave height reaching the coast in a certain time, which reflects the energy of waves. The main wave direction indicates the dominant direction of wind and waves.

When interpreting the wave forecast map, we should pay attention to the following points:

1. Observe the density of contour lines, which reflects the period and frequency of waves. The denser the contour lines, the shorter the wave period and the higher the frequency, and vice versa.

2. Observe the shape of contour line, which reflects the shape of waves. For example, a circular or oval profile indicates that the waves are gentle, while a long or serrated profile indicates that the waves are steep.

3. Analyze the wave forecast by combining wind direction and wind information. Generally speaking, wind direction and wind force are the main factors affecting waves. If the wind direction and wind force are consistent with the main wave direction, the wave will be more intense.

4. Analyze the wave situation in combination with other factors of marine environment, such as tide, seabed topography, seawater temperature, etc. These factors will affect the shape and energy of waves.

It should be noted that the wave forecast chart is only a reference tool, and the actual wave situation may be affected by many unpredictable factors, such as the sudden change of wind direction and the change of seabed topography. Therefore, at sea, we must always pay attention to meteorological changes and changes in sea conditions to ensure safety.