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.本数据集文件包含2023年7月在中洛文布拉肯（Midtre Lovénbreen）冰川前缘采集的微粗糙度（micro-roughness，含Ra、Rz参数）数据、Schmidt回弹仪（Schmidt hammer）回弹值的原始与校正数据，以及反射光谱数据。 本研究受波兰国家科学中心（National Science Centre, Poland）资助（项目编号：Preludium Bis-2 2020/39/O/ST10/01068）。 本次采集的微粗糙度、岩石强度（Schmidt回弹仪回弹值）与光谱反射率数据，均为原位测得于冰川磨蚀岩石表面，采样断面从冰舌前端延伸至小冰期（Little Ice Age）形成的最外侧冰碛垄，覆盖了极地冰川前缘环境中约118年的陆上风化时长。 本研究对研究区域开展了无人机（UAV）测绘，以获取数字高程模型（Digital Elevation Models, DEMs），为未来开展精细化对比研究提供支撑。 测试样地1紧邻冰川，其岩石风化时长约3年；样地2位于风化时长约43年的区域；样地3对应约63年风化时长的区域；样地4对应约87年风化时长的区域；最后一处样地（样地5）位于小冰期（LIA）冰碛垄上，其风化时长约118年。 所有样地均设置于冰碛垄中的黑云母片麻岩（biotite gneiss）漂砾上，这些漂砾带有清晰的冰川磨蚀痕迹，由此可推断，冰川堆积前形成的早期风化外皮已被侵蚀殆尽。 样地的选取依据为风化时长、均一的岩相学特征、可及性以及适配微粗糙度测量的条件。 在每个测试样地中，我们选取了10处带有明显冰川磨蚀痕迹的岩石表面（单块面积约100 cm²），用于开展微粗糙度、Schmidt回弹仪回弹值（岩石强度）以及光谱反射率的测量工作。