Displacements on selected rock glaciers in the United States

Lateral displacements between two years on selected rock glaciers in the United States (Rocky Mountains and westwards). Displacements were measured using image correlation on repeat orthoimages from the United States Geological Survey archive. Correlation software used: CIAS (http://mn.uio.no/icemass).

The data are the raw data behind the following publication. This publication contains more details about the measurements. 

Kääb, A., Røste, J. Rock glaciers across the United States predominantly accelerate coincident with rise in air temperatures. Nat Commun 15, 7581 (2024). https://doi.org/10.1038/s41467-024-52093-z

Detailed rock glacier positions [lat°, lon°]:

Star Peak [44.253,-120.417]Galena creek [44.645,-109.791]Sulphur creek [44.617,-109.756]Crater Mtn [44.023,-109.627]Old Hyndman [43.743, -114.106]Ferguson ranch [39.270, -107.194]Thomas lake [39.270,-107.155]Arapaho [40.020,-105.641]Mt Mears [38.018,-107.871]Mt Sneffels [38.010,-107.781]Teakettle Mtn [38.011,-107.768]Twin Sisters [37.762,-107.803]Pine creek [37.078,-118.450]Birch creek [37.065,-118.431]Cardinal Mtn N [37.011,-118.414]Cardinal Mtn S [37.008,-118.409].

Names of individual displacement files:

Short-name-of-rock-glacier_year1_year2_correlation-window-size_search-window-size_xxx.txt/.csvxxx is either 'helm' indicating that the two orthoimages have been coregistered using Helmert transformation, or 'filt' indicating Helmert transformation and filtering of grid-based measurements for outliers. 

Data columns of each file:

X: UTM coordinate, Easting of displacement measurement point Y: UTM coordinate, Northing of displacement measurement pointdx: displacement component in eastdy: displacement component in northlength: pythagoras of dx and dy (vector length)direction: azimuth of vector (from North, clock-wise)max_corrcoeff: correlation coefficient of displacement matchavg_corrcoeff: background correlation coefficent at a matching poistion.