The Impact of One- and
Two-Moment Microphysical Schemes on Precipitation in an Ordinary
Thunderstorm is the title of Emily's research poster. Emily worked with
Prof. Susan van Den Heever on her research this summer using the RAMS
regional forecasting model.
One- and two-moment microphysical schemes are commonly implemented in
atmospheric models that are used for research or forecasting. In one-moment
schemes, typically the mixing ratio of a cloud species is predicted, and either
the number concentration or diameter is fixed. In contrast, double-moment
schemes predict both the mixing ratio of the property and the number
concentration. This way, all three properties can vary throughout the cloud,
which creates a more realistic simulation. However, most forecast models use
single-moment schemes because they are faster and cheaper.
In Emily's study, the sensitivity to the choice of parameters in single-moment
schemes was explored through examination of the changes to dynamical and
microphysical processes in an ordinary thunderstorm.
Emily came to us from Pacifica, California. She is a senior studying
meteorology at San Francisco State University. Among her academic interests
are the marine layer, advection fog and cloud physics.
Emily's hobbies include yoga, hiking & camping, cloud watching, bird watching
and playing the piano.