On the uncertainties of methods used to reconstruct LIA glacier surfaces ...
<!--!introduction!--> Most glaciers in the world reached their Holocene maximum extent during the so-called Little Ice Age (LIA). Glacier volume change since the LIA requires information on former glacier extent and surface elevation. Whereas extents can be digitized from trimlines and moraine...
| Main Authors: | , |
|---|---|
| Format: | Conference Object |
| Language: | unknown |
| Published: |
GFZ German Research Centre for Geosciences
2023
|
| Subjects: | |
| Online Access: | https://dx.doi.org/10.57757/iugg23-3471 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5019437 |
| Summary: | <!--!introduction!--> Most glaciers in the world reached their Holocene maximum extent during the so-called Little Ice Age (LIA). Glacier volume change since the LIA requires information on former glacier extent and surface elevation. Whereas extents can be digitized from trimlines and moraines, former glacier surfaces need to be reconstructed. Recent studies have interpolated the surface from elevation values along the former outline. However, there has been no comparison or uncertainty analysis of various surface reconstruction and interpolation methods. This study evaluates various spatial interpolation methods and the impact of input datasets on glacier surface reconstruction. Modern glacier surfaces were replicated using a recent DEM, and the methods were tested on a sample of 90 glaciers in southern Novaya Zemlya and 266 glaciers in the Aletsch region of Switzerland. The Natural Neighbour and Topo to Raster interpolation methods available in ESRIs ArcGIS performed best, but all methods struggled ... : The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) ... |
|---|