The mass balance of a glacier represents the link between climate and glacier dynamics. It tells us how much the mass of a part of the glacier has changed in the selected period. There are several methods for determining the mass balance. Triglav glacier has been monitored with various geodetic methods since 1946. Based on the results of geodetic measurements of the glacier and obtained meteorological data, we can calculate the mass balance. This allows us to model the change in the thickness of the glacier even at the time when the measurements were not performed. Based on measurements in 2011 and 2012, we firstly calculated the empirical mass balance coefficients DDF and D(x,y). With these two coefficients, we calculated changes in the thickness of the glacier, based on measurements from September 2012, when the glacier was the smallest and thinnest. In the years 2010–2016, changes in thickness were between 1 m and 3 m. Between 2016 and 2020, changes in glacier thickness were between 1,5 m and 3 m, with significant areas with negative thickness differences. We compared the results with the glacier area size and found that its area increases as the average thickness of the glacier increases and vice versa. Finally, we calculated the average specific mass balance for all the years under consideration. In the whole analysed period 2010–2020 we calculated the highest mass balance for the year 2013 with 1,64 m w.e.a-1 and the lowest for 2015 with –2,68 m w.e.a-1.
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