Lisbon Fair Weather Atmospheric Electric Field and Influences of the Local Meteorology
Besides the long period influences (e.g. Cosmic radiation variation) the Earth’s local fair-weather electric field is influenced by the local meteorology, e.g. Clouds, relative humidity, intensity and direction of the wind. In this work we analyze, daily and seasonal variations of the vertical component of the atmospheric electric field in fair-weather conditions at the ground level, and search for possible correlations between relative anomalies of hourly values of fair weather atmospheric electric field strength and relative humidity, wind intensity, wind directions, and cloudiness. Data of the electric field strength recorded at the Portela meteorological station (Lisbon) (38o47’N, 9o08’W) together with meteorological synoptic data of relative humidity, wind and cloudiness from the same station have been used. We found that for the direction of the north-east wind a weak correlation exists between the relative humidity and fair weather atmospheric electric field for lag times of 2 e 3 hours. The correlation of the anomaly of the fair weather electric field with wind intensity is strong for the wind directions north and north-east for hourly values in between 3-22 UTC and 4-15 UTC, respectively. We also found that the influence of cloudiness on the fair weather electric field anomalies is strong for Cumulus .
Cláudia Serrano A. Heitor Reis
Geophysics Center of the évora, Rua Romǒ Ramalho, 59, 7000-671 évora, Portugal Department of Physics, University of évora, Rua Romǒ Ramalho, 59, 7000-671 évora, Portugal
国际会议
第13届国际大气电学会议(The 13th International Conference on Atmospheric Electricity)
北京
英文
2007-08-13（万方平台首次上网日期，不代表论文的发表时间）