A WRF-Chem analysis of flash rates, lightning-NOx production and subsequent trace gas chemistry of the 29-30 May 2012 convective event in Oklahoma during DC3

- Indicates paper has been withdrawn from meeting
- Indicates an Award Winner
Wednesday, 7 January 2015: 11:15 AM
225AB (Phoenix Convention Center - West and North Buildings)
Kristin A. Cummings, University of Maryland, College Park, MD; and K. Pickering, M. C. Barth, M. M. Bela, Y. Li, D. Allen, E. C. Bruning, D. R. MacGorman, S. Rutledge, B. Basarab, B. R. Fuchs, A. J. Weinheimer, I. B. Pollack, T. B. Ryerson, H. Huntrieser, and M. I. Biggerstaff

The Deep Convective Clouds and Chemistry (DC3) field campaign in 2012 provided a plethora of aircraft and ground-based observations (e.g., trace gases, lightning and radar) to study deep convective storms, their convective transport of trace gases, and associated lightning occurrence and production of nitrogen oxides (NOx). This is a continuation of previous work, which compared lightning observations (Oklahoma Lightning Mapping Array and National Lightning Detection Network) with flashes generated by various flash rate parameterization schemes (FRPSs) from the literature in a Weather Research and Forecasting Chemistry (WRF-Chem) model simulation of the 29-30 May 2012 Oklahoma thunderstorm. Based on the Oklahoma radar observations and Lightning Mapping Array data, new FRPSs are being generated and incorporated into the model. The focus of this analysis is on estimating the amount of lightning-generated nitrogen oxides (LNOx) produced per flash in this storm through a series of model simulations using different production per flash assumptions and comparisons with DC3 aircraft anvil observations. The result of this analysis will be compared with previously studied mid-latitude storms. Additional model simulations are conducted to investigate the upper troposphere transport, distribution, and chemistry of the LNOx plume during the 24 hours following the convective event to investigate ozone production. These model-simulated mixing ratios are compared against the aircraft observations made on 30 May over the southern Appalachians.