Strong DC electric field formation in the low latitude ionosphere over typhoons

This paper presents further development of the electrodynamic model of strong electric field formation in the ionosphere above the regions of tropical storm and typhoon origin and its comparison with new experimental results obtained from the satellite observations of DC electric field and plasma density variations over such regions. According to this model the electric field disturbance arises due to perturbation in the atmosphere-ionosphere electric circuit generated by the upward transport of charged water drops and aerosols in the hurricane convection zone. Calculations of spatial distribution of DC electric field in the ionosphere were carried out with the account of oblique geomagnetic field and the conjugate ionosphere effects. Direct measurements onboard the COSMOS-1809 satellite revealed localized DC electric field disturbances with magnitudes up to 25 mV/m and accompanying plasma density variations δn/n ∼6% over the zones of strong atmospheric perturbations. Comparison of observational data with the results of theoretical modeling shows that the considered model adequately describes the electrodynamic impact of meteorological processes on the ionosphere.