Impulsive geomagnetic variations, latitudinally localized to the auroral zone, have been observed from 2015 2020. These impulsive events mostly in pre-midnight sector as upward vertical perturbations. Diurnal variations geomagnetically-triggered harmonic distortion Hydro-Québec’s Système de Mesure Décalage Angulaire (SMDA) synchrophasor measurement system found a peak number of around midnight....

Diurnal variations in the concentrations of culturable fungal and bacterial bioaerosols were measured during winter spring. Significant observed day this measurement campaign. The bioaerosol concentration exhibited two peaks morning evening periods season. variation was greater spring than that winter. However, not affected by diurnal seasonal changes. Environmental properties such as temperatu...

In the revised version, we emphasized new results from EOF analysis and Lagrangian approach. Following sentence is added in the abstract: “The EOF analysis indicated that these diurnal variations over the African continent seem to be closely related to continental-scale daytime solar heating and topography. On the other hand, advection effect on the diurnal variation appeared to be minor becaus...