The Center for Atmospheric Sciences | » Ariana C. Atwell

    • B.S., Physics, Norfolk State University, 2011

    • Email
  • Project Links

  • News

  • Ariana C. Atwell

    Master’s Student, Atmospheric Science

    Ariana Atwell is working on the Evolution of Aerosol due to the 2011 Nabro Eruption in Eritrea, Africa using CALIPSO and HYSPLIT forward-trajectories.

    The Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) is a NASA satellite  launched into the Afternoon Constellation (A-Train) in 2006. The A-Train Constellation orbits the earth, and crosses the equator at 1:30 pm local time flying in formation with a number of other NASA and international satellites. The Hybrid Single Particle Langrangian Integrated Trajectory (HYSPLIT) Model is a commonly-used trajectory model for predicting air parcel displacement and the dispersion of such parcels or system of parcels. HYSPLIT model has an integrated system to supply accurate trajectories for aerosol tracing, which includes both puff and particulate dispersion-based trajectories (Draxler, 2008).

    CALIPSO is composed of an active Light Detection and Ranging (Lidar) system called CALIOP and measures particle backscatter profiles at two wavelengths, 532 nm and 1064 nm. CALIOP is the cloud-aerosol lidar with orthogonal polarization. CALIPSO’s goal was and still is to determine Direct and Indirect Aerosol Forcings (along with uncertainty), and Cloud-climate feedbacks (Platnick, 2008).