An overview of the Stratospheric‐Tropospheric Experiment: Radiation, Aerosols, and Ozone (STERAO)‐Deep Convection experiment with results for the July 10, 1996 storm

摘要: The Stratospheric-Tropospheric Experiment: Radiation, Aerosols and Ozone (STERAO)-Deep Convection Field Project with closely coordinated chemical, dynamical, electrical, microphysical observations was conducted in northeastern Colorado during June July of 1996 to investigate the production NOx by lightning, transport redistribution chemical species troposphere thunderstorms, temporal evolution intracloud cloud-to-ground lightning for evolving storms on high plains. Major were airborne measurements boundary layer, middle upper troposphere, thunderstorm anvils; ground-based Doppler radar measurements; measurement both (IC) (CG) flash rates locations; multiparameter situ structure. Cloud mesoscale models are being used synthesize extend observations. Herein we present an overview project selected results isolated, severe storm that occurred 10. Time histories reflectivity structure, IC CG rates, layer anvil presented showing large spatial variations. one period time suggest limited mixing environmental air into updraft core from cloud base adjacent core. We deduce most likely contribution total observed is 60–90% a minimum 45%. For 10 produced almost exclusively flashes ratio >0.95 throughout storm's lifetime. It argued this probably others, can be major contributors production. Superposition VHF source locations retrieved motion fields 5 min shows activity primarily moderate updrafts weak downdrafts little excursion main downdraft. This may have important implications vertical resulting production, if found true at other times storms.