Influence of Cyclones on the Atmospheric Electric Field of Kamchatka

摘要

The effects of the influence of cyclones in Kamchatka on the vertical component of the atmospheric electric field (AEF) E_Z were studied. The cyclones were recorded on the basis of electromagnetic radiation of thunderstorm discharges using a VLF-direction finder developed at the Institute of Cosmophysical Research and Radiowave Propagation. The maximal distance to thunderstorm sources recorded by the direction finder reaches 4 • 10~3 km. Azimuthal distributions of VLF-radiation sources and distributions of the epicenters of cyclones determined on the basis of synoptic charts of the Hydrometeorological Service of Kamchatka are presented. Azimuthal displacements of thunderstorm sources located in the regions adjacent to Kamchatka are shown. Monitoring of E_Z was carried out at the Paratunka observatory in Kamchatka using the Pole-2 instrument. It is shown that the E_Z value decreases synchronously with the atmospheric pressure as the cyclone approaches the observatory. The estimates of the electric charge of the cyclone, maximal atmospheric pressure drop in the cyclone center, and so on are presented. It is shown, that the AEF parameter responds to the displacement of a cyclone at a distance greater than 1500 km.