The LaRC PHIWC and ALPHA HIWC potential products attempt to pinpoint where within deep convection high-IWC conditions are likely, a differing goal relative to the MSG CPP product, which masks areas where high IWC is possible throughout the cloud vertical depth.
The three-dimensional ALPHA HIWC potential product, trained on both cloudy and clear pixels observed during the flights, shows similar statistics when verified against a reserved set of independent flight-level data from the three field campaigns (i.e., data not used for training of the algorithm).
In parallel with this research, the International Civil Aviation Organization (ICAO) has recognized a requirement by the international aviation industry for HIWC guidance products and is working to develop service requirements.
The authors thank the organizers, collaborators, and sponsors of the HAIC and HIWC projects who enabled the collection of essential datasets for this work and provided support for development of these products.
W., and Coauthors, 2016: The High Ice Water Content (HIWC) study of deep convective clouds: Report on science and technical plan.