7.5 A Modeling Study of Low-Level-Jets over the Mid-Atlantic Region during (2009

7.5

A Modeling Study of Low-Level-Jets over the Mid-Atlantic Region during

Mengsteab Weldegaber, Univ. of Maryland, Baltimore, MD; and B. B. Demoz, L. C. Sparling, and R. Delgado

A modeling study of the Low-Level-Jets over the mid-Atlantic region is

presented. The Low-Level-Jets were observed during the Water Vapor

Validation Experiments (WAVES), a Satellite validation experiment, at

Beltsville Howard University research Campus in summer 2006/07. The

objective of this research is to understand the dynamics and horizontal

extension of the observed Low-Level-Jets over Baltimore-Washington area;

and also to test and evaluate the Weather Research and Forecasting (WRF)

model. The observed high-resolution wind profiles from Maryland Department

of Environment; radio soundings and lidar observations at Beltsville

research site; and lidar observations at University of Maryland Baltimore

County are used to validate the simulated wind and moisture profiles.

Sensitivity simulations using different boundary layer schemes in the

National Center for Atmospheric Research (NCAR) Advanced Research WRF

(ARW) dynamic core will be discussed.