Solar Radiation Treatments in Snow and Sea-Ice Charlie Zender , Cheng Dang Department of Earth System Science UC Irvine Acknowledging: Andrew Roberts, Mark Flanner, Nicole Jeffery, Elizabeth Hunke, Robert Pincus On Web ACME All-Hands Meeting Potomac, MD June 5-7, 2017
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Solar Radiation Treatments in Snow and Sea-Ice
Charlie Zender, Cheng Dang Department of Earth System Science UC Irvine
Acknowledging:Andrew Roberts, Mark Flanner, Nicole Jeffery,
Single-scattering properties of snow (Dang, Brandt, and Warren 2015)
Mie Theory
Snow radiative transfer simulationSea ice: CICE Delta Eddington methodLand and ice sheet: SNICAR
Optical Properties of Bare Ice and Ponded Ice
SHEBA 1998multi-year sea ice
ICESCAPE 2010, 2011first-year sea ice
• Sea ice interior optical properties measured at finer spectral resolution• Optical properties of first-year sea ice more suitable for the simulation of
current summer Arctic sea ice
Light et al., 2015Briegleb and Light, 2007
Opportunities for Improvement1. Harmonize land/ice with sea-ice snow RT
○ CICE delta-Eddington○ SNow-ICe-Aerosol Radiative model (SNICAR)
2. Re-organize spectral bands○ CAM-SE: RRTMG with 14 solar bands○ ALM+CICE: Two bands (visible+NIR)