Preliminary firn-densification model with 38-site dataset

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Abstract
Firn-densification modeling based on hot isostatic pressing with power-law creep is investigated using depth–density data from 38 sites that collectively have mean annual temperatures ranging from 216 to 256 K and accumulation rates ranging from 0.022 to 1.2 m w.e. a−1. We use an inverse technique to obtain free parameters in a simple physical model for different stages of time-dependent firn densification. Our model works as well as or slightly better than previous models interpolating within the data range, but extrapolating would require additional physics.