Fig. 6: Rock glacier surface strain rates measured at the local sites. | Communications Earth & Environment

Fig. 6: Rock glacier surface strain rates measured at the local sites.

From: Rock glaciers throughout the French Alps accelerated and destabilised since 1990 as air temperatures increased

Fig. 6: Rock glacier surface strain rates measured at the local sites.

The strain rate is measured as a variation of displacement rates (my−1) over the distance between the two points projected on the central flow axis. This is done for each period where displacement rate pairs were available on the orthoimages. Low strain rate values in destabilised rock glaciers refer to the deceleration of the destabilised area (Phase IV—Fig. 1). The boxplot respect the standardized sizes: the interquartile (IQR) range groups observations from the 25th (Q1) to 75th (Q3) percentile, while the whiskers represent the maximum (Q3 + 1.5*IQR) and minimum (Q1−1.5*IQR).

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