A Numerical Model of Aerosol Scavenging: Part 1, Microphysics Parameterization

Conference · Mon Jul 15 04:00:00 EDT 1991

OSTI ID:6099388

Molenkamp, Charles R. ^[1]; Bradley, Michael M. ^[1]

---

1. Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

We have developed a three-dimensional numerical model (OCTET) to simulate the dynamics and microphysics of clouds and the transport, diffusion and precipitation scavenging of aerosol particles. In this paper we describe the cloud microphysics and scavenging parameterizations. The representation of cloud microphysics is a bulk- water parameterization which includes water vapor and five types of hydrometeors (cloud droplets, rain drops, ice crystals, snow, and graupel). A parallel parameterization represents the scavenging interactions between pollutant particles and hydrometeors including collection of particles because of condensation nucleation, Brownian and phoretic attachment, and inertial capture, resuspension because of evaporation and sublimation; and transfer interactions where particles collected by one type of hydrometeor are transferred to another type of freezing, melting, accretion, riming and autoconversion.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6099388
• Report Number(s): UCRL-JC-106109-Rev.1; CONF-9107104--19-Rev.1; ON: DE92004665
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540110*
AEROSOLS
ATMOSPHERIC PRECIPITATIONS
CLOUDS
COLLOIDS
DISPERSIONS
DROPLETS
EVAPORATION
ICE
MATHEMATICAL MODELS
NUCLEATION
PARTICLE RESUSPENSION
PARTICLES
PHASE TRANSFORMATIONS
RAIN
SCAVENGING
SNOW
SOLS
SUBLIMATION