Table 2.
Length changes at Jamtalferner for the period 1864–2018, with annual area losses and lowest glacier altitudes in the periods from direct measurements and calculated from the shapes (GIS). *… no DEM of the glacier bed is available, #… direct length change measurements from 1925 onwards, GIS data refers to 1921.
| Year | Interval (in years) to previous measurement | Length change | GIS | Total period | difference | Per year | |
|---|---|---|---|---|---|---|---|
| measured | difference | difference | |||||
| years | m | m | m | % | m | ||
| 1864 | |||||||
| 1895 | 31 | 784 | |||||
| 1898 | 3 | 30 | |||||
| 1904 | 6 | 95 | |||||
| 1909 | 5 | 137 | |||||
| 1921 | 12 | 135 | |||||
| 1954 | 33 | 449 | 389.5 | # | 59.5 | 15.3 | 1.8 |
| 1969 | 15 | 84 | 173.4 | −89.4 | −51.6 | −6.0 | |
| 1970 | 1 | 28 | 3.2 | 24.8 | 775.0 | 24.8 | |
| 1995 | 25 | 157 | 163.7 | −6.7 | −4.1 | −0.3 | |
| 1996 | 1 | 12 | 12.1 | −0.1 | −0.8 | −0.1 | |
| 2002 | 6 | 54.8 | 57 | −2.2 | −3.9 | −0.4 | |
| 2006 | 4 | 52.6 | 53.6 | −1 | −1.9 | −0.3 | |
| 2009 | 3 | 7.6 | 33.8 | −26.2 | −77.5 | −8.7 | |
| 2010 | 1 | 2.8 | 19.4 | −16.6 | −85.6 | −16.6 | |
| 2015 | 5 | 53.2 | 65.4 | −12.2 | −18.7 | −2.4 | |
| Total | 151 | 901 | 971.1 | −70.1 | −7.2 | −0.5 |