This work describes an inviscid solution for a cyclonic flowfield evolving in hemispherical chamber configuration. In this context, vigorously swirling motion is triggered by gaseous stream that introduced tangentially to the inner circumference of chamber's equatorial plane. The resulting updraft spirals around while sweeping wall, reverses direction approaching headend, and then tunnels itsel...

A method has been developed for using particle hygroscopicity measurements made with a humidified tandem differential mobility analyzer (HTDMA) to determine water activity as a function of solute weight percent. In Part I, the method was tested for particles composed of sodium chloride and ammonium sulfate. Here, we report results for several atmospherically-relevant organic species: glutaric a...

Staring at a hailstone helps to determine various characteristics, such as shape or size. However, from the physics point of view, one most important characteristic is type growth. Each stone’ elements (nucleus, lobes, rings) conductive explaining environmental behaviour its formation and development stages. The thermodynamic variables derived upper-air soundings numerical weather prediction si...

By using Weather Research and Forecasting Model (WRF) to simulate a southwest vortex precipitation process, this work studies the correlations between entrainment rate (λ) dynamical parameters in cloud further fit λ. We relate probability density distribution (PDF) parameterization of λ find that greater probability, larger slope logarithmic liner function. The log-linear fitting function decre...

The time-dependent freezing rate (TDFR) model here described represents the formation of ice particles by immersion freezing within an air parcel. The air parcel trajectory follows an adiabatic ascent and includes a period in time when the parcel remains stationary at the top of its ascent. The description of the ice nucleating particles (INPs) in the air parcel is taken from laboratory experim...

Invariance properties of physical systems govern their behaviour: energy conservation in turbulence drives a wide distribution of energy among modes, as observed in geophysical or astrophysical flows. In ideal hydrodynamics, the role of the invariance of helicity (correlation between velocity and its curl, measuring departures from mirror symmetry) remains unclear since it does not alter the en...