Correct for Elevation Change

The iceTEA tool determines past changes in sample elevation from either a glacial isostatic adjustment (GIA) model or a linear rate (uplift or subsidence), and then calculates exposure ages correcting for these changes. It uses a modified version of the CRONUScalc calculation framework (Marrero et al., 2016), with time-dependent elevation-latitude scaling factors, and global production rate calibration datasets (Borchers et al., 2016). The corrected ages can then be plotted as kernel density estimates.

Details are described here: Jones et al., 2019, Quaternary Geochronology (preprint version here). Please cite this paper if you use this tool.

For more about the potential impact of land elevation change on ice sheet reconstruction, see this paper.

Upload exposure age data in the ‘standard’ input form (as .xlsx, .csv or .txt), and choose preferred time-dependent production scaling model: ‘Lm’ (Lal, 1991); ‘LSD’ (Lifton et al., 2014); ‘LSDn’, nuclide-specific scaling (Lifton et al., 2014). Then select the elevation change method, either from a GIA model or as an average linear rate. NOTE: This is a calculation-intensive tool and may take 5 minutes per sample.