Dataset of micro-roughness, Schmidt hammer and reflectance spectra obtained at Midtre Lovénbreen foreland

The files contain data of micro-roughness (Ra and Rz), raw and corrected data of Schmidt hammer rebound-values, and reflectance spectra obtained at Midtre Lovénbreen glacier foreland in July 2023. 

Funding provided by National Science Centre, Poland (Preludium Bis-2 2020/39/O/ST10/01068).

Micro-roughness, rock strength (Schmidt hammer rebound values), and spectral reflectance were obtained in-situ on glacially abraded rock surfaces along a transect from the glacial snout  to the outermost moraines from the Little Ice Age, covering circa 118 years of subaerial weathering in the proglacial polar environment. UAV surveys of the studied area were performed to obtain Digital Elevation Models (DEMs) and allow for detailed comparative studies in the future.

Test site 1 was very close to the glacier (undergoes weathering for 3 years), site 2 was in the zone c. 43 years old, site 3 was in the zone c. 63 years old, site 4 was in the zone c. 87 years old, and the last one (site 5) was on the LIA moraines, where the duration of weathering is c. 118 years. The sites were located on biotite gneiss boulders embedded in the moraines with distinct traces of glacial abrasion, allowing us to infer that older weathering rind (developed before glacial accumulation) has been eroded. The sites were selected based on their age, homogenous petrography, accessibility, and suitability for micro-roughness measurements. Within each test site, we selected ten specific rock surfaces (c. 100 cm2 each), with clear signs of glacial abrasion, for the measurements of micro-roughness, Schmidt hammer rebound (rock strength), and spectral reflectance.