group. The file has seven columns.
1: unique id-number of the group (integer).
2: name of the group (character without spaces).
3:
type (character, "ic" for ice caps, "gl" for valley glacier).
4:
total ice-covered area (floating point number, m²).
5:
total ice volume (floating point number, m³).
6: characteristic response time (floating point number, years).
7: coefficient giving the relative
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