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TRACKS - Transport and Chemical Conversion in Convective Systems

Explore the transport processes and chemical conversion in convective systems, with a focus on trace gas and aerosol transport. Investigate the influence of deep convection on the budget of climatically active substances in the upper troposphere and the impact on the trace gas balance of the atmospheric boundary layer. Various research interests include convective transports, precipitation formation, lightning, anvil properties, and turbulent gas transport measurements.

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TRACKS - Transport and Chemical Conversion in Convective Systems

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  1. TRACKS – Transport and Chemical Conversion in Convective Systems - an activity associated to COPS • TRACKS-COPS • Focus • Convective trace gas and aerosol transport • Objectives • Transport Processes (and Precipitation Formation) in Convective Systems • Influence of Deep Convection on the Budget of Climatically Active Substances (Gases and Aerosols) in the Upper Troposphere • Influence of Convection on the Trace Gas Balance of the Atmospheric Boundary Layer

  2. TRACKS – Transport and Chemical Conversion in Convective Systems • DLR Interests in TRACKS-COPS • Convective Transports; Inflow of trace gases and aerosols, • CCN, Precipitation formation • Lightning and influence of aerosols on lightning • Strength of convection • Anvil properties • MPI interests • details of trace gas transport in updrafts • reduction of PBL pollutant concentrations by updrafts and mesoscale • descending motion • moist deposition by convective precipitation (SFB/WRF) • lightning and Nitrous Oxides production (SFB / WRF) • FZK interests • Turbulent gas transport measurement by airborne eddy correlation • Proving dilution of PBL pollutants by deep convection • Effects of mountain/valley wind systems on pollutant transport

  3. TRACKS – Transport and Chemical Conversion in Convective Systems g IUP Focus Mapping of one-dimensional to three-dimensional distributions of water vapour and other greenhouse gases (O4, CO, CH4) as well as reactive species by remote sensing of trace gases inside and outside convective systems with passive DOAS (Differential Optical Absorption Spectroscopy). • FZJ Focus • Photochemical development of a city plume • Pseudo-Lagrangian experiment on photochemical conversion of pollutants (VOC + Nox -> O3, HCOH, PAN, Particles • IPM Focus • High resolution water vapour distribution in the PBL • Turbulent fluxes from Lidar • Data assimilation

  4. FZJ – Airborne Zeppelin NT, HOx-measurements, UV actinic flux, meteorology, MAX-DOAS (U Heidelberg) FZK - Airborne Dornier 128; CO, H2O, CO2, NO, NOx, O3, turbulence, pyranometers, pyrgeometers, dropsondes IUP - Airborne MAX-DOAS, I-DOAS on Zeppelin NT; opt. on other aircraft, H2O + in UV/VIS range (O3,O4,NO2, NO3, CH2O, SO2)and infrared(CO, CH4) MPI - Airborne Learjet 35A (see figure) DLR - Airborne Falcon with DIAL and Wind-Lidar; some instruments for air chemistry?

  5. Common mission types? • Transport by individual convective cells • Pseudo-Lagrangian experiment: Photochemical development of a plume • Budget estimates for mesoscale regions

  6. Pseudo-Lagrangian experiment: Photochemical development of a (city) plume Flight Track Do 128 Wind trajectory Wind trajectory Wind trajectory , HCHO, PAN, Particles Photochemical Conversion of Pollutants O 3 Flight Track Zeppelin Flight Track Zeppelin x VOC + NO Source Area

  7. Pseudo-Lagrangian experiment: Photochemical development of a (city) plume Flight Track Do 128 Wind trajectory Wind trajectory Wind trajectory , HCHO, PAN, Particles Photochemical Conversion of Pollutants O Flight Track Zeppelin 3 x VOC + NO DOAS Source Area A. Hofzumahaus, F. Holland FZJ

  8. Transport by individual convective cells + Learjet Sketch: H. Höller, DLR

  9. Budget estimates for mesoscale regions

  10. Budget estimates for mesoscale regions

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