1. Comparisons of Cloud In-Situ Microphysical Properties of Deep Convective Clouds to Appendix D/P, Using Data from the HAIC-HIWC and HIWC RADAR I Flight Campaigns
- Author
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Strapp, J. Walter, Schwarzenboeck, Alfons, Bedka, Kristopher M, Bond, Thomas, Grandin-Camels, Alice, Delanoe, Julien, Dezitter, Fabien, Grzych, Matthew, Harrah, Steven, Korolev, Alexei, Leroy, Delphine, Lille, Lyle, Mason, Jeanne, Potts, Rodney, Protat, Alain, Ratvasky, Thomas P, Riley, James, and Wolde, Mengistu
- Subjects
Geosciences (General) - Abstract
In-situ cloud data from three international flight campaigns is compared to the new Federal Aviation Administration (FAA) Title 14 Code of Federal Regulations Part 33 Appendix D mixed-phase/glaciated environmental envelope (1), and the corresponding identical European Aviation Safety Agency (EASA) CS-25 Appendix P envelope (2) (hereafter "Appendix D/P"). Appendix D/P consists of a temperature-altitude envelope, a 99th percentile total water content (TWC99) envelope at the 17.4 Nm distance scale, a distance factor to estimate TWC99 values at other distance scales, ice crystal median mass diameter (MMD), and recommended liquid water content (LWC) levels in mixed-phase icing conditions. The dataset is from 45 flight missions in 3 tropical locations, with 472 runs in approximately 115 clouds, providing about 29,600 Nm of in-cloud data in deep convection over four targeted temperature intervals: 10, 30, 40, and 50 +5 C. The measurements span altitueds from about 17,000' to 39,000'. The comparisons will serve as a basis for regulatory and industry assessment of the efficacy of Appendix D/P.
- Published
- 2019