Fig. 3
Comparison of snow surface changes measured manually at snow thickness stakes with the snow surface changes at the same stakes measured by TLS during two evaluation periods (Table 3). Error bars show the 95% confidence intervals of the measurement uncertainty for the manual measurement (Eq. 2) and the TLS measurement (Eq. 4, note that each TLS measurement has an individual uncertainty which depends on the distance of the stake from the scanner and the number of TLS points within 10 cm of the stake). The black, dashed line is the 1:1 line (on which the manual measurement is equal to the TLS measurement). The grey shading above and below line represents the ± 0.011 m uncertainty in our posterior estimate of the bias. No bias between the manual and TLS measurements is visually apparent.
