From source: "Ice mass measurement by NASA's GRACE satellites. Gap represents time between missions. Credit: NASA" (includes data from GRACE AND GRACE follow-on)
Version 1 was made with Inkscape.
Most of the code for Version 4 (2022-01-22) was made with the "line graph" spreadsheet documented at User:RCraig09/Excel to XML for SVG, with subsequent manual edits in text editor to further optimize code.
Versions 4 and 9: Data downloaded from "Get Data HTTP" button at https://climate.nasa.gov/vital-signs/ice-sheets/ (free registration required to download)
Version 9 data listing: https://podaac-tools.jpl.nasa.gov/drive/files/allData/tellus/L4/ice_mass/RL06.1/v03/mascon_CRI/antarctica_mass_200204_202211.txt (free registration required to read page)
Is an SVG equivalent of NASA chart at https://climate.nasa.gov/vital-signs/ice-sheets/
Archive of 2020-12-09: https://web.archive.org/web/20201209114245/https://climate.nasa.gov/vital-signs/ice-sheets/
Archive of 2022-01-22: https://web.archive.org/web/20220122055014/https://climate.nasa.gov/vital-signs/ice-sheets/
Employee(s) of NASA, U.S. government, in the ordinary course of their employment duties.