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December 1, 2005Journal of Applied Meteorology

Bulk Scattering Properties for the Remote Sensing of Ice Clouds. Part II: Narrowband Models

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Authors

BBBryan A. BaumNSF National Center for Atmospheric ResearchPYPing YangSinopec (China)AHAndrew J. HeymsfieldFlorida State University

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Implication

Radiative transfer modeling demonstrates significant variations in ice cloud scattering properties across crystal habits, indicating improved satellite cloud property retrievals for MODIS.

Key Points

  • To develop band-averaged bulk single-scattering ice cloud models at MODIS wavelengths for use in satellite remote sensing retrievals.
  • Analyzed 1,117 ice cloud particle size distributions measured across five field campaigns: FIRE-I, FIRE-II, ARM IOP, KWAJEX, and CRYSTAL-FACE.
  • Computed band-averaged bulk scattering properties—including single-scattering albedo, asymmetry factor, and phase function—at 0.65, 1.64, 2.13, and 3.75 μm.
  • Compared radiative properties calculated using a habit mixture model against a uniform solid hexagonal column model and MODIS Version 1 operational models.
  • Bulk scattering properties differed substantially between ice clouds generated in deep convective updrafts and those found in low-updraft environments.
  • Single-scattering albedo was consistently lower for solid hexagonal columns than for habit mixtures across 1.64, 2.13, and 3.75 μm, with divergence increasing at longer wavelengths.
  • Asymmetry factor differences between crystal habits peaked at 0.65 μm and converged to near-identical values at 3.75 μm, with MODIS Version 1 discrepancies attributable to assumed particle size distributions.

Cite This Study

Baum et al. (2005) studied this question.

synapsesocial.com/papers/69dab8e8a6045d71bfa3df1bhttps://doi.org/10.1175/jam2309.1
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Also Consider

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