Abstract:

In order to have the better application of lightning day parameters of automatic monitoring data from lightning position system, the data of lightning day and thunderstorm day of 13 national climatological stations was studied based on the data of thunderstorm day and automatic monitoring system. The results showed that: (1) there were significant differences between average thunderstorm day and average lightning day in ratio in these stations. Generally, the thunderstorm day number was less than that of lightning day and positive correlation. The proportion had the close relation to the area and topography environment. (2) There were significant differences in observation radius of different lightning days, and the number value of the radius are all less than 10 km, which objectively showed the nonhomogeneity of the lightning activity, and the sensitivity of equipment was better than that of human hearing and vision. The earshot of the observer to the lightning was less than 10 km. (3) The observation radius in main cities was the least, which caused by the combined action of the buildings around the observatory obstacles, environmental noise and air visibility changes. (4) There was obvious relationship between observation radius of lightning day and topography. The observation radius in main cities was less, and in northeast and southeast was bigger. Totally, the data from equipment was continuous and comparability in the similar area.