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CPI and 3V-CPI Imagery at Storm Peak Lab

CPI and 3V-CPI Imagery at Storm Peak Lab. Paul Lawson Jay Mace SPEC Incorporated University of Utah. CPI Installed at Storm Peak Lab (Remained free of Rime Ice). 3V-CPI Replaced CPI in February 2011.

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CPI and 3V-CPI Imagery at Storm Peak Lab

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  1. CPI and 3V-CPI Imagery at Storm Peak Lab Paul Lawson Jay Mace SPEC Incorporated University of Utah

  2. CPI Installed at Storm Peak Lab (Remained free of Rime Ice)

  3. 3V-CPI Replaced CPI in February 2011

  4. 3V-CPI Electro-optics

  5. 3V-CPI Characteristics • Combines CPI and 2D-S probes, which doubles as the particle detection system for the CPI imaging camera. • 2D-S reduces uncertainties in CPI size distribution. Can use wind speed measurements from SPL annemometer or 2D-S particle transit time measurements. • Identification of water drops and ice crystals is done using CPI imagery. 2D-S measurements are then used to quantitatively determine water and ice size distributions. • Software development to produce separate water and ice size distributions is under development (currently not in existence).

  6. Following Example Shows how CPI (and 3V-CPI) Images can be used Qualitatively to Identify Regions of Water, Mixed-Phase and Ice Regions of Cloud

  7. Water Drops Water Ice Ice/Water

  8. Mixed Water Drops Water Ice Ice/Water

  9. Mixed Water Water Drops Water Ice Ice/Water

  10. Mixed Water Mixed Water Drops Water Ice Ice/Water

  11. Mixed Water Mixed Water Drops Ice Water Ice Ice/Water

  12. Mixed Water Mixed Water Drops Ice Water Drops Water Ice Ice/Water

  13. Data Processing Scheme • CPI Images will be placed in the archive shortly following the close of StormVex. • The Water/Mixed/Ice time series product will follow. • Algorithm to Detect Riming CPI Images may be Possible • 2D-S data will take longer yet to process. • Combined CPI/2D-S Data Products will be Available sometime within a year following the close of StormVex.

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