1a. Incident radiation: Direct Diffuse 1b. Solar zenith angle, if incident radiation is direct (0–89 degrees): degrees
2. Surface spectral irradiance conditions: (Clear-sky conditions assumed for direct incident radiation, cloudy conditions assumed for diffuse light): Mid-latitude winter Mid-latitude summer Sub-Arctic winter Sub-Arctic summer Summit Greenland High Mountain (surface pressure of 556 hPa) Top of atmosphere
3. Snowpack thickness: meters
4. Snowpack density: kg/m3
5. Ice refractive index data: Warren (1984) / Perovich and Govoni (1991) Warren and Brandt (2008) Picard et al. (2016) / Warren and Brandt (2008) Carbon dioxide ice (Hansen, 2005; Singh and Flanner, 2016)
6. Snow grain effective radius (30–1500 microns): μm
7. Snow grain shape (He et al., 2017): Spheres Spheroids (aspect ratio of 0.5) Hexagonal plates (aspect ratio of 2.5) Koch snowflakes (aspect ratio of 2.5)
8. Broadband albedo of underlying ground:
9. Black carbon concentration (ppb, or nanograms of BC per gram of snow): Uncoated: ppb Sulfate-coated: ppb (Note: This BC has a similar absorption enhancement as BC internally-mixed in ice grains)
12. Type of dust: Sahara (Balkanski et al.,2007) San Juan Mountains, CO (Skiles et al., 2017) Greenland (Polashenski et al., 2015) Mars (Wolff et al.,2009,2010; Singh and Flanner, 2016)
14. Type of volcanic ash: Eyjafjallajökull (Flanner et al., 2014)
15. Snow algae concentration (cells/mL): cells/mL
16. Mean algal cell radius (microns) (Valid values are: 1 2 5 10 15 20 25 30 40 50): μm