12D.1 Convective Process Experiment (CPEX) 2017

Thursday, 19 April 2018: 8:00 AM
Heritage Ballroom (Sawgrass Marriott)
Shuyi S Chen, Univ. of Washington, Seattle, WA; and E. J. Zipser

CPEX is a NASA supported field experiment to study convective processes in the tropics. The main science objectives are:
  • Improve understanding of convective processes including cloud dynamics, downdrafts, cold pools and thermodynamics during initiation, growth, and dissipation.
  • Obtain a comprehensive set of simultaneous wind, temperature, and moisture profiles, using Doppler wind lidar (DAWN), microwave radiometer and sounder (HAMSR/MASC), and GPS dropsondes, conduct a quantitative evaluation of those profiles in the vicinity of scattered and organized deep convection measured by airborne precipitation radar (APR2), in all phases of convective life cycle.
  • Improve model representation of convective and boundary layer processes over the tropical oceans using a cloud-resolving, fully coupled atmosphere-ocean model, and assimilate the wind, temperature and humidity profiles into the model.

CPEX 2017 took place in the North Atlantic-Gulf of Mexico-Caribbean Sea region from 25 May-25 June 2017. NASA's DC-8 aircraft was based at the Fort Lauderdale, Florida. It logged 106 hours flight time with a total of 16 science missions (91 hours). CPEX conducted a total of sixteen DC-8 missions from 27 May-24 June. The 16 missions covered a wide range of weather conditions from clear and calm wind, isolated convective cloud systems, to Tropical Storm Cindy (2017). It is the first field campaign that collected airborne observations continually from pre-tropical disturbance in the Caribbean Sea, to tropical depression, and formation of Tropical Storm Cindy in the Gulf of Mexico prior to landfall. This talk will provide an overview of the CPEX science missions and preliminary results.

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