Jökull - 01.01.2013, Qupperneq 64

Da̧bski and Tittenbrun
Figure 7. Results of micro-roughness measurements; dates of moraine deposition at test sites; diagram includes
means, 95% confidence intervals for the means, medians (white dots), minima and maxima and a horizontal
dashed line (upper limit of 95% confidence interval for moraine VII+) serving as a reference line. – Mælingar
á hrjúfleika steina á jökulgörðunum.
Table 1. The Spearman rank correlation analysis.
– Niðurstöður Spearman prófana.
Rs p
Site rank & Rz 0.38 0.000000
Site rank & Rzmax 0.27 0.000007
Site rank & Ra 0.37 0.000000
Site rank & Rsm 0.00 0.959324
Site rank & weathering
rind thickness
0.65 0.000000
Site rank & Schmidt
hammer R-values
-0.37 0.000000
Bold numbers denote statistically different popula-
tions (p<0.05).
Table 2. Comparison of micro-roughness parameters
rounded to 0.1 µm (with 95% confidence intervals)
for youngest and oldest moraines of Fláajökull and
Biferten glaciers. – Samanburður á mælingum við
Fláajökul og Bifertenjökul í Sviss.
Fláajökull Biferten
Youngest site Oldest site Youngest site LIA max
(> AD 2000) (LIA max?) (> AD 2000)
Ra 4.0±0.4 5.4±0.4 3.1±7.3 7.3±0.6
Rz 21.8±1.8 29.0±2.0 17.6±2.3 39.7±2.6
Rzmax 30.8±2.8 39.4±3.2 23.6±3.8 53.1±4.2
Rsm 258.7±19.4 274.1±19.0 170.4±19.4 256.9±22.7
64 JÖKULL No. 63, 2013