edu.ucar.opensky::articles:21279 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-25T16:10:45.759838 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d7qf8whn https://doi.org/10.1594/PANGAEA.548743 https Related Dataset #1 High resolution density, conductivity, deuterium, and δ¹⁸O of ice core FRI09C90_13 https://doi.org/10.1594/PANGAEA.548637 https Related Dataset #2 Annual means of density, δ¹⁸O, deuterium, tritium, and accumulation rates of firn core BER01C90_01 Improving the representation of polar snow and firn in the Community Earth System Model 2017-11-16T00:00:00Z publication https://n2t.org/ark:/85065/d7qf8whn https://doi.org/10.1002/2017MS000988 van Kampenhout, L. author Lenaerts, J. T. M. author Lipscomb, William author Sacks, William J. author Lawrence, David M. author Slater, A. G. author van den Broeke, M. R. author UCAR/NCAR - Library publisher In Earth system models, terrestrial snow is usually modeled by the land surface component. In most cases, these snow models have been developed with an emphasis on seasonal snow. Questions about future sea level rise, however, prompt the need for a realistic representation of perennial snow, as snow processes play a key role in the mass balance of glaciers and ice sheets. Here we enhance realism of modeled polar snow in the Community Land Model (CLM), the land component of the Community Earth System Model (CESM), by implementing (1) new parametrizations for fresh snow density, destructive metamorphism, and compaction by overburden pressure, (2) by allowing for deeper snow packs, and (3) by introducing drifting snow compaction, with a focus on the ice sheet interior. Comparison with Greenlandic and Antarctic snow density observations show that the new physics improve model skill in predicting firn and near-surface density in the absence of melt. Moreover, compensating biases are removed and spurious subsurface melt rates at ice sheets are eliminated. The deeper snow pack enhances refreezing and allows for deeper percolation, raising ice temperatures up to 15 degrees C above the skin temperature. UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact PDF Text theme Resource Type 2016-01-01T00:00:00Z publication Copyright author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. None eng geoscientificInformation