Convective Meteorology (Mesoscale Dynamics)

Sensitivity of Tropopause-Penetrating Convection and Transport to Microphysics Parameterization in WRF-Chem

Daniel Phoenix

School of Meteorology

05 February 2016, 3:00 PM

National Weather Center, Room 5600
120 David L. Boren Blvd.
University of Oklahoma
Norman, OK

Tropopause-penetrating convection is capable of rapidly transporting air from the lower troposphere to the upper troposphere and lower stratosphere (UTLS). Since the vertical redistribution of gases in the atmosphere can have important impacts on the chemistry of the UTLS, the radiative budget, and climate, it has become a recent focus of observational and modeling studies. Aircraft observations in recent field campaigns, such as the Deep Convective Clouds and Chemistry (DC3) experiment have provided new high-resolution observations of convective transport. However, aircraft observations can be limited in space and time. Modeling studies, on the other hand, offer the advantage of providing extra details not obtained by observations. Here, we present preliminary results from a microphysics sensitivity study using the Weather Research and Forecasting model with Chemistry (WRF-Chem). Since the dynamics, physics, and chemistry of convection depend on microphysical processes, we examine the sensitivity of convective transport in several DC3 cases to the choice of bulk microphysics parameterization in WRF-Chem. Model results are evaluated using in situ observations from two aircraft operated during the DC3 experiment.

Convective Meteorology (Mesoscale Dynamics) Seminar Series website