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ri_dust

Constants​

Complex refractive index of mineral dust (silicate-rich, e.g., Saharan): n + i k, wavelength in nm. Assumptions: dry, ~300 K, bulk effective constants representative of a typical desert mineral dust (quartz/feldspar/clays mix). Morphology not modeled; values intended for bulk-equivalent Mie.

Composite sources and notes:

  • OPAC mineral dust (Hess et al., 1998) — visible/NIR anchors (m ≈ 1.53 + 0.008i at 0.55 µm).
  • Sokolik & Toon (1999), JGR 104, 9423–9444 — spectral behavior and strong Si–O features in 8–12 µm.
  • Querry (1985/1991), Optical constants of minerals — silicate trends in MIR/LWIR (quartz/feldspars/clays).
  • Patterson, Winchester & Barlow (1977), and Shettle & Fenn (1979) — atmospheric dust guidance.

Table design:

  • 200–20,000 nm coverage; linear interpolation by ParameterLookupTable.
  • Preserves your original 400–700 nm values exactly to avoid visible-range regressions in graphics.
  • Denser sampling near 3 µm OH-complex and the strong 9–10 µm Si–O reststrahlen band.

Functions​

💨 MINERAL DUST

DUST_REFRACTION_INDEX_LUT​

Complex refractive index of mineral dust (silicate-rich, e.g., Saharan): n + i k, wavelength in nm. Assumptions: dry, ~300 K, bulk effective constants representative of a typical desert mineral dust (quartz/feldspar/clays mix). Morphology not modeled; values intended for bulk-equivalent Mie.

Composite sources and notes:

  • OPAC mineral dust (Hess et al., 1998) — visible/NIR anchors (m ≈ 1.53 + 0.008i at 0.55 µm).
  • Sokolik & Toon (1999), JGR 104, 9423–9444 — spectral behavior and strong Si–O features in 8–12 µm.
  • Querry (1985/1991), Optical constants of minerals — silicate trends in MIR/LWIR (quartz/feldspars/clays).
  • Patterson, Winchester & Barlow (1977), and Shettle & Fenn (1979) — atmospheric dust guidance.

Table design:

  • 200–20,000 nm coverage; linear interpolation by ParameterLookupTable.
  • Preserves your original 400–700 nm values exactly to avoid visible-range regressions in graphics.
  • Denser sampling near 3 µm OH-complex and the strong 9–10 µm Si–O reststrahlen band.

Kind: global constant

ri_dust(result, wavelength_nm)​

💨 MINERAL DUST

Kind: global function

ParamTypeDescription
resultArray.<number>complex number, refraction index
wavelength_nmnumberin nanometers