The relationships between mean terminal velocity and volume diameter of different hydrometeors, as well how they change with background aerosol concentrations have been investigated numerical simulations tropical deep convection from the Weather Forecast Research Model (WRF), coupled spectral bin microphysics. results showed a positive correlation either mass-weighted (Vm) or number-weighted (V...

Abstract The size distributions of raindrops and precipitation particles were measured in a series situ experiments during various weather events Warsaw, Poland. To perform the measurements, shadowgraph instrument, “VisiSize D30”, was set up on roof Institute Geophysics, University together with an “OTT Parsivel 2 ” laser disdrometer. VisiSize D30, recently introduced to atmospheric research, i...

Abstract. Frozen hydrometeors are found in a huge range of shapes and sizes, with variability on much smaller scales than those typical model grid boxes or satellite fields view. Neither models nor situ measurements can fully describe this variability, so assumptions have to be made applications including atmospheric modelling radiative transfer. In work, parameter estimation has been used opti...

A new method to determine the shape and fall velocity of hydrometeors by using a single CCD camera is proposed in this paper, and a prototype of a video precipitation sensor (VPS) is developed. The instrument consists of an optical unit (collimated light source with multi-mode fibre cluster), an imaging unit (planar array CCD sensor), an acquisition and control unit, and a data processing unit....

One of the challenges that limit the amount of information that can be inferred from radarmeasurements of ice and mixed-phase precipitating clouds is the variability in ice mass within hydrometeors. The variable amount of ice mass within particles of a given size drives further variability in single-scattering properties that results in uncertainties of forward-modeled remote sensing quantities...

The efficiency of gas transport to the free and upper troposphere in convective clouds is investigated in an axisymmetric dynamic cloud model with detailed microphysics. In particular, we examine the sensitivity of gas transport to the treatment of gas uptake by different ice hydrometeors. Two parameters are used to describe this uptake. The gas retention coefficient defines the fraction of dis...