Shapefiles of volcanoes and nearby glaciers in South America used to demonstrate the link between glacier equilibrium line altitude (ELA) and volcano thermal anomaly.
收藏Mendeley Data2024-01-31 更新2024-06-27 收录
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* 37_GVP_Volacanoes.shp and 13_AVTOD_Volacanoes.shp It is recognised that magma vent and tectonic structures could be complex for specific volcanoes (e.g., Nevado del Huila in Colombia) and hence GVP points can underestimate the extent and exact location of volcanic activity (thus, glacio-volcanic interactions). However, a volcano by volcano (field based) analysis of the magmatic geometry and geothermal heat flux each volcano was not feasible. * 600_RGI_Glaciers.shp and 139_Remapped_Glaciers.shp RGI/GLIMS have acknowledged that an ~5% gross geometry error was observed for the Southern Andes (region 17) for RGI 6.0 glacier outlines due to the inclusion of seasonal glacier-peripheral snow and transient ice, which was misclassified as glacial ice. Our exclusion of glaciers smaller than 0.1 km2 will have removed the likelihood of including at least some erroneously mapped snow patches and seasonal ice cover. While checking and potentially re-mapping all 74 volcanic- and 526 proximal glaciers would have been unfeasible within the scope of this particular study, we attempted to correct such factors for 13 volcanoes with a record of measured thermal anomalies (analysis central to this research), for which all glaciers outlines were re-mapped by applying a semi-automated mapping process. Using this technique, we could efficiently extract glacier polygons before carrying out manual adjustments to improve alignment with the glacier margins observed on short-wave false colour composite imagery.
创建时间:
2024-01-31



