The Effect of The Gust Front on The Generation of New Convection

The importance of gust fronts in triggering new storm development is widely recognized. A three-dimensional numerical cloud model developed by Klemp and Wilhelmson is used to study the relationship of new convection to previously generated gust fronts. The model has been modified with a vertically stretched grid, a fourth-order conservative approximation for horizontal advection, and an Orlanski type boundary condition. The sounding taken from the multicell Raymer storm that occurred in NHRE on 9 July 1973 is used as the initial environment in the model. Five new cells form about 25-30 min apart due to the downdraft from the previous cell enhancing the convergence along the gust front. A comparison with observation data shows qualitative agreement. Comparison of results with those obtained by other modelers for different storms is also included.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Atmospheric Sciences

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2014

Author dc:creator

• Chen, Ching-Sen

• Physics, Atmospheric Science

Language dc:language

eng

Identifier

(UMI)AAI8026462

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/67804