helio connections file included
VSP | CGC Hosts Database

Database of CGC Hosts
Project Description

Michigan Technological University

Contact Info

Michigan Technological University
Physics & Atmospheric Sciences
1400 Townsend Drive
118 Fisher Hall
Houghton, MI 49931

Raymond Shaw

Phone: (906) 487-1961
Email: rashaw@mtu.edu
Website: www.phy.mtu.edu/shaw/

Fields of Interest

Atmospheric physics: cloud microphysics, atmospheric turbulence, nucleation, and radiative transfer. Instrumentation science: laboratory and field cloud/turbulence measurements, digital holography, phase-Doppler interferometry.

Description of Scientific Projects

1. How does turbulence influence cloud microphysical processes such as droplet growth by condensation and collision/coalescence? We are addressing this question with a combined laboratory and field experimental effort. We study the Lagrangian motion and spatial distribution of cloud particles in a laboratory chamber that produces locally homogeneous, isotropic turbulence. Particles are tracked in three dimensions using digital holography. In the field, we study the turbulence and microphysics of clouds using a phase Doppler interferometer, flown on a helicopter-borne system operated by colleagues at the Leibniz Institute for Tropospheric Research (IfT). We also have developed an airborne holographic system for cloud measurements (HOLODEC) and are collaborating on the next generation instrument with colleagues at NCAR. 2. How does ice form in clouds? In recent years we have investigated the relative roles of surface and volume-based liquid-solid nucleation of ice. Our efforts in studying ice nucleation have been primarily in the laboratory using single-particle levitation and using a temperature-controlled stage. In collaboration with colleagues at IfT we are conducting experiments to study the possible role of evaporation in ice nucleation.

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