Seasonal Changes of Mélange Thickness Coincide With Greenland Calving Dynamics

demo_codes_CodeOcean.zip contains the sample code and data file to reproduce Figure 13(a)(d) in the supplemental material (Melange surface elevation profile at Jakobshavn on 19 Apr 2014, from ArcticDEM). User can run the Hx_distribution.m file, which calls peakFit.m function and dpROI_Jakob_20140419.mat data file, and to obtain the figure. This folder has been uploaded to code ocean portal as well (https://codeocean.com/capsule/4948451/tree). 

Termini_offset_tide.xlsx contains the elevation offsets applied on the 108 ArcticDEM strips for the 32 Greenland glacier termini, with corresponding ArcticDEM strip acquisition dates and Mosaic DEM tiles for coregistration.

GlacierID_GlacierName.zip folders contain two types of files: 1) points_yymmdd.csv contains point ID, x and y coordinates in polar stereographic projection (EPSG: 3413). The first and second points (ID=1, 2) delineate the glacier terminus segment, and the third to the last points (ID=3, N) delineate the region of interest of proglacial melange from the corresponding ArcticDEM strip acquired on the same date (yymmdd); 2) dpROI_yymmdd.mat contains all data points from the ArcticDEM strip cropped by the melange region of interest. Every row represents one data point from ArcticDEM, the first to fourth column corresponds to i) x coordinate in polar stereographic projection (EPSG: 3413); ii) y coordinate in polar stereographic projection (EPSG: 3413); iii) elevation above mean sea level in meters before coregistration; and iv) distance of the data point from the terminus segment in meters. Column iii) and iv) are used to plot the melange surface elevation (or thickness) profile as a function of distance from terminus. 

Hx_distribution.m is the MATLAB file (calling the function peakFit.m) that plots the melange surface elevation profile as a function of distance from terminus (Z(x)), providing the dpROI_yymmdd.mat file.

ICESat-2_allData.zip folder contains the ICESat-2 data presented in Figure 2 in the main text (seasonal melange surface elevation profiles for Jakobshavn, Kangerlussuaq, and Store glaciers). Figure 2 in the main text can be reproduced by running the MATLAB code inside the folder (Fig_H_x_disToTerm.m), which includes the geoid and tidal corrections on the ICESat-2 raw data files.