Current Research

CURRENT RESEARCH

Cynthia H. Twohy

Last updated 4/29/2003

My research at Oregon State is related to atmospheric aerosols and aerosol/cloud interactions, with an emphasis on airborne measurements. I'm interested in the indirect effect (through clouds) of aerosol particles on climate, and take measurements of CCN and ice nuclei in clouds. I'm also involved in airflow analysis of airborne instrumentation and work on projects for the Research Aviation Facility at the National Center for Atmospheric Research.

One of the instruments I use, the counterflow virtual impactor (CVI), is used for cloud physics and chemistry studies. The CVI is an NCAR instrument and can be made available to the community by request. Here are the CVI aircraft mounting requirements (slightly out of date; contact me for details).

This J TECH paper (in press) describes wind tunnel results of the CVI measurement of cloud condensed water content.

Some early results using the CVI to measure ice water content in thunderstorm anvils CRYSTAL-FACE program are given here (PowerPoint presentation).

Some CVI and CCN results from the Indian Ocean Experiment (INDOEX) project can be found in this JGR paper.

You can access some early electron microscope results of ice nuclei in thunderstorm anvils here (PowerPoint presentation).

This JGR paper reports on one of the largest particle nucleation events ever detected in the upper troposphere.

Go back to Cynthia Twohy's home page