The Microphysical and Radiative Properties of Tropical Cirrus From the 2006 Tropical Warm Pool International Cloud Experiment (twp-Ice)

262 p.Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2009.The impacts of variations in small ice crystal shapes and concentrations on bulk scattering properties of tropical cirrus are quantified. The calculated mean asymmetry parameter g&macr; for the fresh anvil (i.e., 2 Feb) is larger than that for cirrus bands of varying ages (i.e., 27 and 29 Jan.) for -60 < T < -45&deg;C and -45 < T < -30&deg;C where the fractional contributions of small ice crystals to total cross sectional area are small. The impact using different models for small ice crystals on g&macr; is largest at lower temperatures (T < -60&deg;C). The impact of enhanced number concentrations of small ice crystals on the bulk scattering properties depends on the assumed shapes of small ice crystals, which is largest (smallest) in the temperature ranges of -45 < T < -30 T (T < -60&deg;C) where the CAS/CDP ratio of N of small ice crystals is maximum (minimum).U of I OnlyRestricted to the U of I community idenfinitely during batch ingest of legacy ETD