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Poster Title

A unified snow and sea-ice radiative transfer algorithm for Earth System Models

AuthorsCheng Dang (Unlicensed), Charlie Zender, Mark Flanner, Bonnie Light, and Adrian Turner
First AuthorCheng Dang (Unlicensed)
Session TypeE3SM/Integrated Session
Session IDE4
Submission TypePoster
GroupCryosphere
ExperimentCryosphere
Poster Link




Abstract

Solar properties of snow can be computed by the SNow ICe and Aerosol Radiative (SNICAR) model widely used in land models, and by Icepack, the column physics used in CICE and MPAS-seaice. These models adopt 2-stream approximations (TSAs) with different radiative transfer techniques, as a result, the same snow has different solar radiative properties depending whether it is on land or on sea ice in the Energy Exascale Earth System Model (E3SM). A unified cryospheric surface radiative model in E3SM is thus crucial for constraining modeling uncertainties and studying climate/hydrology. We evaluate the current TSA models in E3SM (SNICAR and MPAS-seaice) and a 2-stream discrete ordinate model (2SD) against benchmark models, for their simulations of snow and sea-ice solar properties.

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