Journal ArticleDOI
Kinetics of Hydrometeor Growth from a Vaper-Spherical Model
Norihiko Fukuta,L. A. Walter +1 more
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In this paper, a new growth equation for pure water and solution droplets with radii≳1µm has been developed which features discrete vapor and temperature fields at the surface of growing droplets.Abstract:
A new growth equation for pure water and solution droplets with radii≳1µm has been developed which features discrete vapor and temperature fields at the surface of growing droplets. The discrete fields are created by the condensation and thermal accommodation coefficients in order to maintain steady state in the vapor and heat transfers. The newly derived equation is compared with previous theories, and their differences and ranges of applicability are clarified. It is shown that the newly derived equation includes some of the previous equations as special cases. The new equation is numerically evaluated and graphically examined for the case of pure water droplets. The results show a spreading tendency in size distribution of formed droplets at the start of their growth. The present theory and equations may also be applied to the evaporation of a droplet and the growth of an ice particle where the shape can he assumed to he spherical.read more
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Journal ArticleDOI
A Continuous-Flow Streamwise Thermal-Gradient CCN Chamber for Atmospheric Measurements
Gregory Roberts,Athanasios Nenes +1 more
TL;DR: In this paper, a cylindrical continuous-flow thermal-gradient diffusion chamber employing a novel technique of generating a supersaturation is proposed to maximize the growth rate of activated droplets, thereby enhancing the performance of the instrument.
Book
Sea Salt Aerosol Production: Mechanisms, Methods, Measurements, and Models - A Critical Review
TL;DR: In this paper, Sea salt aerosol (SSA) particles interact with other atmospheric gaseous and aerosol constituents by acting as sinks for condensable gases and suppressing new particle formation, thus influencing the size distribution of other aerosols and more broadly influencing the geochemical cycles of substances with which they interact.
Journal ArticleDOI
Cloud microphysics: Analysis of the clouds of Earth, Venus, Mars and Jupiter
TL;DR: In this paper, the probable microphysics of a cloud is deduced by a described method which requires information on cloud particle mean size, composition, number density, and atmospheric structure, but does not require any additional information.
Journal ArticleDOI
The influence of entrainment on the evolution of cloud droplet spectra: I. A model of inhomogeneous mixing
TL;DR: In this article, the growth of condensate droplets rising above cloud base within small cumuli which are entraining undersaturated environmental air is investigated. But the authors assume that the mixing process is inhomogeneous.
Journal ArticleDOI
Continued development of a cloud droplet formation parameterization for global climate models
TL;DR: In this paper, the authors extended the Nenes and Seinfeld (2003) cloud droplet activation parameterization to accommodate the effect of size (and potentially organic films) on the droplet growth rate.