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Deep Convective Clouds and Chemistry (DC3) Field Experiment

Deep Convective Clouds and Chemistry (DC3) Field Experiment. Principal Investigators: Mary Barth (NCAR), Bill Brune (PSU), Chris Cantrell(NCAR), Steve Rutledge (CSU). Steering Committee: Ken Pickering Jim Crawford Laura Pan

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Deep Convective Clouds and Chemistry (DC3) Field Experiment

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  1. Deep Convective Clouds and Chemistry (DC3) Field Experiment Principal Investigators: Mary Barth (NCAR), Bill Brune (PSU), Chris Cantrell(NCAR), Steve Rutledge (CSU) Steering Committee: Ken Pickering Jim Crawford Laura Pan Andrew Heymsfield Don Lenschow Owen Cooper Andy Weinheimer Paul Krehbiel Jeff Stith Alan Fried

  2. DC3: Characterize the effects of continental, midlatitude deep convection on the transport and transformation of ozone and its precursors • Processing in the convection, • Processing in the anvil • Processing in the convective outflow 12-48 hours later • Contrast different types of convection and different emission regions http://utls.tiimes.ucar.edu/Science/dc3.shmtl

  3. Ancillary Objectives of DC3 • Halogen Chemistry in the UTLS • Determine mass fluxes of air and trace gases into and out of the storm, • Cloud electrification and lightning discharge processes • Effects of deep convection on UT water vapor • Convective processing of aerosols and their impact on water and ice particles http://utls.tiimes.ucar.edu/Science/dc3.shmtl

  4. A Storm Penetrating Aircraft (SPA) can help reach these objectives: • Processing of trace gases in the convection, • Processing in the anvil (mid to lower regions) • Cloud electrification and lightning discharge processes • Effects of deep convection on UT water vapor • Convective processing of aerosols and their impact on water and ice particles

  5. Importance of Production of NOx by Lightning Barth et al., 2006, submitted to JGR

  6. Cross Section of CO CO used as a tracer of boundary layer air ppbv Barth et al., 2006, submitted to JGR

  7. Soluble Species and Their Fate in Deep Convection Total CH2O mixing ratios = gas + cloud water + rain + ice + snow + hail Barth et al., 2006, submitted to JGR

  8. CH2O (gas) CO O3 H2O2 (gas) CO O3 HNO3 (gas) Transects across Anvil Disagreement among models, but no observations available Barth et al., 2007, in preparation

  9. Priority Instruments on a SPA to Understand Convective Processing of Constituents • NO • 150 lbs., 10 pptv detection limit, and 0.5-sec time response • (courtesy of Andy Weinheimer, NCAR) • CO • Soluble Species: • Formaldehyde, Hydrogen Peroxide, Nitric Acid

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