Cold-based debris-covered glaciers Evaluating their potential as climate archives through studies of ground-penetrating radar and surface morphology 冷基碎屑覆盖冰川：通过对探地雷达和表面形态的研究评估其作为气候档案的潜力.pdf

PUBLICATIONS Journal of Geophysical Research: Earth Surface RESEARCH ARTICLE Cold-based debris-covered glaciers: Evaluating 10.1002/2014JF003178 their potential as climate archives through Key Points: studies of ground-penetrating radar • Cold-based debris-covered glaciers preserve long-term records of and surface morphology climate change • Englacial debris bands reflect 1 1 1 2 Sean L. Mackay , David R. Marchant , Jennifer L. Lamp , and James W. Head climate oscillations • Climate changes are observed as arcuate 1Department of Earth and Environment, Boston University, Boston, Massachusetts, USA, 2Department of Earth, ridges on debris-covered glaciers Environmental and Planetary Sciences, Brown University, Providence, Rhode Island, USA Supporting Information: • Readme Abstract We describe the morphology and internal structure of Mullins and Friedman Glaciers, two • Table S1 cold-based, debris-covered alpine glaciers that occur in neighboring valleys in the McMurdo Dry Valleys, • Table S2 • Figure S1 Antarctica. Both glaciers are overlain by a single, dry supraglacial debris layer (8–75 cm thick); each mantling • Figure S2 debris layer is marked with near-identical patterns of arcuate ridges and steps, as well as corresponding • Figure S3 changes in bulk grain size, meter-scale surface topography, and thermal contraction crack polygons. Results • Figure S4 • Figure S5 from 24 km of gro